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NT2H7908 323-1401-380
FiberWorld Transmission Product
Digital Video Codec DV-45
DV-OC3 Unit Reference Manual
FW02 3.01 Standard September 1995
FiberWorld Transmission Product
Digital Video Codec DV-45 DV-OC3 Unit Reference Manual
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
1995 Northern TelecomAll rights reserved.
Integrated Community Networks is a trademark of Northern Telecom. DV-45 is a trademark of Northern Telecom.
Publication number: 323-1401-380Product release: FWP02 3.01Publication status: StandardPEC: NT2H7908Date: September 1995
ii
Publication historySeptember 1995
Standard issue for general release.
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
iii
ContentsPublication history ii
Introducing the DV-45 system 1–1DV-45 purpose 1–1DV-45 components 1–1
Cabinets 1–1DV-45 filler cards 1–2DV-45 shelves 1–2DV-45 Coders 1–2DV-45 Decoders 1–2DV-45 DCS units 1–2DV-45 MCUs 1–2DV-45 OC3 units 1–4
DV-OC3 unit description 2–1Feature description 2–2Functional description 2–3Interface description 2–4
Alarm indications 3–1Overview 3–1Alarm and status reporting 3–1Faceplate alarm indicators 3–2Alarm port indicators 3–5
Parallel alarm port 3–6Serial alarm port 3–6
Interpreting alarms and status indicators 3–9
DV-OC3 unit applications 4–1Bidirectional applications 4–1Unidirectional applications 4–2Single DS3 feed application 4–4Multiple DS3 feed application 4–5Data interface applications 4–6Hubbing to an OC12 application 4–7Hubbing from a DVN application 4–8
DV-OC3 Unit Reference Manual 323-1401-380 FW02 3.01 Standard
iv
Contents
Ordering information 5–1Typical configurations 5–2
Four DV-OC3 units in a DV-45 shelf 5–2One DV-OC3 unit within a DV-45 shelf 5–3
Provisioning DV-OC3 units 5–4
Technical specifications 6–1
Observing safety guidelines 7–1DV-45 shelf 7–1DV-45 units 7–1
Handling units 7–2Storing units 7–2Installing or replacing units 7–2
Optical fibers 7–3Laser radiation 7–3Bending optical fibers 7–3Handling optical fibers 7–3Splicing optical fibers 7–4Repairing optical fibers 7–4
Radio-frequency emissions 7–5
Installing and setting DV-OC3 unit options 8–1Requirements 8–1Chapter task list 8–2Procedure 8-1Installing a heat deflector and routing fiber cables 8–3Procedure 8-2Setting DV-OC3 unit options 8–7Procedure 8-3Installing DV-OC3 units in a DV-45 shelf 8–10Procedure 8-4Upgrading DV-45 MCU firmware 8–15Procedure 8-5Connecting DS3 signals to a DV-OC3 unit 8–17Procedure 8-6Cleaning and assembling optical connectors 8–19Procedure 8-7Measuring optical output power 8–24Procedure 8-8Measuring optical receive power 8–27
Digital Video Codec DV-45 323-1401-380 FW02 3.01 Standard
v
About this documentThis document provides DV-45 DV-OC3 unit descriptive, alarm, application, ordering, technical specification, and installation information.
AudienceThis document is intended for DV-45 equipment planners, provisioners, network administrators, installers, and maintenance personnel.
OrganizationThis document contains eight chapters:
Introducing the DV-45 system Gives an overview of the DV-45 system of which DV-OC3 units are part.
DV-OC3 unit description Describes the DV-OC3 unit purpose, features, functions, and interface connections.
Alarm indications Lists the DV-OC3 unit alarms, the conditions that initiate them, the TBOS mappings, and alarm interpretation.
DV-OC3 unit applications Describes applications of DV-OC3 units.
Ordering information Provides DV-OC3 unit provisioning and ordering information.
Technical specifications Summarizes the technical specifications of DV-OC3 units.
Observing safety guidelines Describes the precautions that should be observed when working with DV-45 shelves, DV-45 units, and optical fibers.
Installing and setting DV-OC3 unit options
Provides procedures for setting DV-OC3 unit options and installing DV-OC3 units.
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
vi
About this document
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
1-1
Introducing the DV-45 system 1-DV-OC3 units are part of the Northern Telecom (Nortel) DV-45 Digital Video Codec system. This chapter introduces the DV-45 system and describes how DV-OC3 units are used within it.
DV-45 purposeA DV-45 system converts analog video signals into digital signals for transmission on standard digital telecommunication equipment. A DV-45 system converts RS-170A National Television Systems Committee (NTSC) composite video signals to standard DS3 (44.736 Mb/s) digital signals. Typical applications of the DV-45 system are the Nortel Digital Video Network (DVN) and Video Operations Center (VOC) products.
DV-45 componentsThe main components of a DV-45 system are:
• cabinets
• filler cards
• DV-45 shelves
• DV-45 Coders
• DV-45 Decoders
• DV-45 DCS units
• DV-45 MCUs
• DV-45 DV-OC3 units
CabinetsFiber terminal inside plant (FTIP) cabinets and video codec enclosures (VCE) are used to house rack-mountable DV-45 shelves. Each FTIP cabinet has one 2.13 m (7 ft) by 584.20 mm (23 in.) wide equipment frame with a total of 44 mounting spaces (one mounting space equals 44.45 mm [1.75 in.]). Each VCE cabinet can house one DV-45 shelf, one power supply, and one interface panel. Both cabinets are designed to operate in 0°C to 40°C (32°F to 104°F) ambient temperatures.
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
1-2
Introducing the DV-45 system
DV-45 filler cardsIn order to meet electromagnetic interference (EMI) requirements, empty DV-45 shelf slots must be equipped with single or double filler cards.
DV-45 shelvesA DV-45 shelf is a light-weight steel card cage with a multilayer backplane. Modular plug-in units slide along card guides into connectors mounted in the backplane. The shelf has 11 plug-in positions which are keyed to prevent modules from being inserted in the wrong position. Adjustable mounting brackets allow installation into either a 482.6 mm (19 in.) or 584.2 mm (23 in.) mounting bay without additional hardware. See Figure 1-1.
DV-45 CodersA DV-45 Coder is a plug-in module that converts an analog NTSC video signal and up to four audio inputs to a DS3 digital output. A DV-45 Coder occupies a single DV-45 shelf position. All connections are made at the rear of the DV-45 shelf—BNC connectors for video input and DS3 output signals and screw connections for audio input signals.
DV-45 DecodersA DV-45 Decoder is a plug-in module that converts a DS3 digital input into a video signal and up to four audio signals. A DV-45 Decoder occupies a single DV-45 shelf position. All connections are made at the rear of the DV-45 shelf—BNC connectors for video output and DS3 input signals and screw connections for audio output signals.
DV-45 DCS unitsA DV-45 data communication synchronization (DCS) unit is a plug-in module that inserts or extracts low-speed data into or from the DS3 signal with the encoded video and audio signals. A DCS unit occupies a single DV-45 shelf position. All connections are made at the rear of the DV-45 shelf—BNC connectors for DS3 signals and screw connections for data signals.
DV-45 MCUsA DV-45 maintenance control unit (MCU) is a plug-in module that communicates with the other modules in a DV-45 shelf and gathers alarms and status data and interprets them as major or minor alarm indicators. A MCU plugs into DV-45 shelf position 10. All connections are made at the rear of the DV-45 shelf—wire-wrap connections for major and minor alarms parallel interface; an E2A1 TBOS alarm serial interface (RS-422); and an E2A2 computer control data serial interface (RS-422).
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
Introducing the DV-45 system
1-3
Figure 1-1DV-45 shelf—front and rear views
FW-3101.1 & FW-2361
Decoder
CAUTION
Decoder
Position #
DecoderCoder MCUDCS
0 1 2 3 4 5 6 7 8 9 10
OC3
FW-2361Position # 7 6 5 4 3 2 1 0
VIDEOOUT/IN
VIDEOOUT/LOOP
VIDEOIN/OUT
VIDEOLOOP/OUT
VIDEOOUT/IN
VIDEOOUT/LOOP
VIDEOIN/OUT
VIDEOLOOP/OUT
VIDEOOUT/IN
VIDEOOUT/LOOP
VIDEOIN/OUT
VIDEOLOOP/OUT
VIDEOOUT/IN
VIDEOOUT/LOOP
VIDEOIN/OUT
VIDEOLOOP/OUT
DS3IN/OUT
DS3MONITOR
DS3OUT/IN
DS3MONITOR
DS3IN/OUT
DS3MONITOR
DS3OUT/IN
DS3MONITOR
DS3IN/OUT
DS3MONITOR
DS3OUT/IN
DS3MONITOR
DS3IN/OUT
DS3MONITOR
DS3OUT/IN
DS3MONITOR
DECODER/CODER CODER/DECODER DECODER/CODER CODER/DECODER DECODER/CODER CODER/DECODER DECODER/CODER CODER/DECODER
CODEC 4 CODEC 3 CODEC 2 CODEC 1
VIDEO & DS3 INPUT / OUTPUT FIELD
PORT 1
PORT 2
RS-232
BAT A
BAT B
DS1 FIELD FUSESRET BAT BAT RET
A B
POWER
MONITOR PROGRAM MONITOR PROGRAM MONITOR PROGRAM MONITOR PROGRAM MONITOR PROGRAM
CODER/DECODER DECODER/CODER CODER/DECODER DECODER/CODER CODER/DECODER
CODEC 2 CODEC 1
AUDIO INPUT / OUTPUT FIELD
MONITOR PROGRAM MONITOR PROGRAM MONITOR PROGRAM
GRTG
CH1
CH2
CH3
CH4
+-G+-G+-G+-G
DECODER/CODER CODER/DECODER DECODER/CODER
CODEC 4 CODEC 3
GRTG
CH1
CH2
CH3
CH4
+-G+-G+-G+-G
GRTG
CH1
CH2
CH3
CH4
+-G+-G+-G+-G
GRTG
CH1
CH2
CH3
CH4
+-G+-G+-G+-G
GRTG
CH1
CH2
CH3
CH4
+-G+-G+-G+-G
GRTG
CH1
CH2
CH3
CH4
+-G+-G+-G+-G
GRTG
CH1
CH2
CH3
CH4
+-G+-G+-G+-G
GRTG
CH1
CH2
CH3
CH4
+-G+-G+-G+-G
ALARMS
AUXILIARY
IN OUT
Video and DS3Input/Output Field
AlarmsAudio Input/Output Field
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
1-4
Introducing the DV-45 system
DV-45 OC3 unitsA DV-45 DV-OC3 unit is a plug-in module that multiplexes and demultiplexes three DS3 signals to one SONET OC3 (155 Mb/s) fiber signal. An DV-OC3 unit occupies two slot positions in a DV-45 shelf. DS3 signals are connected by BNC connectors located at the rear of the DV-45 shelf and OC3 fiber optic connections are made at the front of the unit.
Additional informationFor additional information on the DV-45 Digital Video Codec product, refer to the DV-45 Reference Manual, PEC NT2H7902.
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
2-1
DV-OC3 unit description 2-This chapter describes the DV-45 DV-OC3 unit purpose, features, functions, and interface connections.
A DV-OC3 unit is a plug-in module used to multiplex and demultiplex up to three DS3 signals to one SONET OC3 fiber signal. The unit occupies two slot positions in a DV-45 shelf (slots 0 and 1, 2 and 3, 4 and 5, or 6 and 7). The three DS3 signals are connected by BNC connectors located at the rear of the DV-45 shelf. The OC3 fiber optic signals are connected to intermediate-reach or long-reach optical modules using ferrule (FC), straight (ST), or subscriber (SC) connectors located at the front of the DV-OC3 unit. The long-reach optical modules have a greater output power and greater input sensitivity.
The two types of optical module and three types of connector lead to six types of DV-OC3 unit. The six types of DV-OC3 unit, identified by their Nortel product engineering code (PEC), are:
PEC Description
NT2H08AB DV-OC3 unit, long reach, FC connector
NT2H08AC DV-OC3 unit, long reach, ST connector
NT2H08AD DV-OC3 unit, long reach, SC connector
NT2H08BB DV-OC3 unit, intermediate reach, FC connector
NT2H08BC DV-OC3 unit, intermediate reach, ST connector
NT2H08BD DV-OC3 unit, intermediate reach, SC connector
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
2-2
DV-OC3 unit description
Feature descriptionThe DV-OC3 unit:
• provides an unprotected fiber and DS3 interface
• fits in a DV-45 shelf and occupies two slot positions in a DV-45 shelf
• multiplexes three DS3 signals to one SONET OC3 signal
• demultiplexes one SONET OC3 signal to three DS3 signals
• can be used in bidirectional or unidirectional modes of operation
• can be equipped with intermediate and long reach optical units
• supports FC, ST, and SC type optical connectors
• interfaces to a SONET OC3 tributary on a SONET OC12 product
• interfaces to the DV-45 shelf backplane maintenance bus for alarms
• consists of two boards—one for control and one for the interface connectors
• does not support traffic protection by the K1, K2 bytes of the SONET line overhead layer; a fixed code is set at initialization
• does not support indicator byte H4
• sets, when required, bits 6–8 of the SONET line overhead byte K2 to indicate a line AIS (alarm indication signal) and far-end receive failure (FERF); when used in unidirectional mode, line FERF must be suppressed
• does not use the SONET data communication channels (DCC) of section overhead (bytes D1-D3) and line overhead (bytes D4-D12); when used with other equipment, the DCC alarm must be suppressed
• does not support performance monitoring
• does not support fault isolation, using SONET section overhead byte E1 (local orderwire) and line overhead byte E2 (express orderwire)
• does not use the SONET path overhead STS path trace byte (J1)
• does not support SONET OC-3C operation.
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
DV-OC3 unit description
2-3
Functional descriptionSee Figure 2-1 for a functional block diagram of a DV-OC3 unit.
Figure 2-1Functional block diagram for a DV-OC3 unit
Block Description
DS3 Line Interface This module interfaces the DS3 signals from the BNC connectors on the back of the DV-45 shelf to the DS3/STS1 Mapper circuitry
VCO The voltage control oscillator (VCO) recovers the DS3 clock from the STS1 signal
DS3/STS1 Mapper This module provides the mapping between the DS3 and STS1 signals
STS1/STS3 Mux/DeMux and Synchronizer
This module synchronizes, multiplexes, and demultiplexes the STS1 and STS3 signals
Optical Module This module converts the STS3 electrical signal to an OC3 optical signal; it also provides interface circuitry for the input and output connectors on the front of the unit
CPU The central processing unit (CPU) controls all provisioning, alarm reporting, maintenance signaling, and data transfers between modules and the DV-45 backplane; the CPU is controlled by firmware stored in ROM and DIP switches on the unit
System Clock This module automatically provides the Tx Freerun clock signal when disconnected from the Rx fiber signal or when optioned to do so
PUPS The point-of-use power supply (PUPS) converts the DV-45 shelf -48 V dc supply to the voltages required by the unit
VCO
VCO
VCO
OC3
OpticalModule
CPUMaintenance Bus
Faceplate LEDs PUPs
DS3-1
DS3-2
DS3-3S
TS
1/S
TS
3 M
ux/D
eMux
and
Syn
chro
nize
r
SystemClock
o
DIPSwitches
o
DS3/STS1Mapper
DS3/STS1Mapper
DS3/STS1Mapper
DS3Line Interface
DS3Line Interface
DS3Line Interface
Out
In
In
In
In
Out
Out
Out
STS3
STS1-1
STS1-2
STS1-3
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
2-4
DV-OC3 unit description
Interface descriptionThe DV-OC3 unit accepts: up to three DS3 input and three DS3 output connections; one OC3 input fiber connection; and one OC3 output fiber connection. The DS3 connections are made using BNC connectors at the rear of the DV-45 shelf (see Figure 2-2). The OC3 connections are made using fiber connectors on the front of the DV-OC3 unit (see Figure 2-3).
Figure 2-2Rear DS3 BNC connections
FW-2377.2
Note: A DS3 in and out ports label is provided with all DV-OC3 units.
DS3-1 OUT
DS3-2 OUT
DS3-3 OUT
DS3-1 IN
DS3-2 IN
DS3-3 IN
OC3 Line Interface
VIDEOOUT/IN
VIDEOOUT/LOOP
DS3IN/OUT
DS3MONITORDECODER/CODER
CODEC 2
Slot 5
DS3 inputs DS3 outputs
Slot 4 Slot 3
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
DV-OC3 unit description
2-5
Figure 2-3Front OC3 fiber connections
FW-3103.1
Note: The OC3 input and output fibers are routed through a DV-45 fiber management heat deflector mounted on top of the DV-45 shelf. The fiber management integrated into the heat deflector provides for storing additional fiber for up to 16 cables and four miniature variable optical attentuators (mVOA). Transmission fiber access is provided at the left-hand side of the heat deflector. Access to DV-OC3 units is provided through the bottom of the heat deflector.
Locking Bar
01
2
67
89
10
CAUTION
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
2-6
DV-OC3 unit description
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
3-1
Alarm indications 3-This chapter lists the DV-OC3 unit alarms, the conditions that initiate them, the telemetry byte-oriented serial (TBOS) mappings, and alarm interpretation.
OverviewThe central processing unit (CPU) of a DV-OC3 unit detects and diagnoses alarms. The CPU routes alarms to the unit’s faceplate and the internal maintenance bus (M-bus) on the DV-45 shelf backplane. A DV-45 maintenance control unit (MCU) collects alarms from the M-bus, classifies them as major or minor alarms, and routes them to parallel and serial (TBOS) alarm ports at the rear of the DV-45 shelf.
Various conventions are used to define signal transmit (Tx) and receive (Rx) directions; the convention used within this chapter is illustrated in Figure 3-1.
Figure 3-1Signal convention
Alarm and status reportingA DV-OC3 card has two modes of operation—bidirectional or unidirectional. These modes determine alarm and status reporting. The OC3 line and STS-DS3 transmit (Tx) and receive (Rx) interfaces may be equipped or unequipped. The DS3 line build out (LBO) may be set to IN or OUT using switches or TBOS commands. The system clock may be set to Loop timed or Freerun mode.
Rx Tx
RxTx
OC3 signalsDS3 signals
Rx = receiveTx = transmit
DV-OC3 unit
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
3-2
Alarm indications
Some TBOS control points function as both status indicators and command points. When used as a command point, the operator can operate a momentary latch from TBOS and override the switch settings. The state of the OC3 line, STS path, DS3 interface, LBO, and system clock are set by switch settings on the DV-OC3 unit (see “Setting DV-OC3 unit options” on page 8-7) and may be overwritten by TBOS command points set by the MCU. STS path unequipped and DS3 alarm indication signal (AIS) are automatically inserted by the software on unequipped channels. Hardware status is reported using alarm points and may be accessed through the MCU E2A1, RS-422, serial alarm port using a TBOS digital alarm scanner.
Most hardware faults are detected by self-checking circuitry. Alarm and status information is reported by the software as equipment or facility alarms. The CPU is reset whenever a software failure is detected. Remote alarm and status reporting is not supported, so all alarm and status information is only reported locally. Alarms on channels provisioned as unequipped are not reported.
Note: For TBOS 1.0, the “DS3-x Fac. Lpb” control points function as both status indication and command points. For TBOS 2.0, the “STS-x Tx Eqp.”, “STS-x Rx Eqp.”, “DS3-x Fac. Lpd Rq”, “DS3-x LBO”, and “Loop Time” all function as both status indication and command points.
Faceplate alarm indicatorsEquipment and facility alarms are indicated using colored light-emitting diodes (LED) on the faceplate. Refer to Table 3-1 for each alarm indication and its associated LED. Refer to Figure 3-2 for the location of each LED on the faceplate. To eliminate related alarm indications; lower-level alarms are masked when associated higher-level alarms are generated (see Figure 3-3).
Table 3-1DV-OC3 unit faceplate LED alarm indicators
LED Alarm Indication
OC3 (Yellow) This LED indicates one or more OC3 facility alarms: LOS (loss of signal); LOF (loss of frame); Line AIS (alarm indication signal); Line FERF (far-end receive fault); Line degrade (B2 BIP-8); Section degrade (B1 BIP-8); Signal degrade
STS/DS3-1 (Yellow) These LEDs indicate one or more of the following STS1 path or DS3 facility alarms (alarms on unequipped channels are not reported): STS AIS (alarm indication signal) path detect; STS yellow detect; STS path degrade; STS Rx path unequipped; STS signal label mismatch; DS3 Tx loss of signal; Tx BCV (bipolar code violation); DS3 Tx/Rx frame loss; DS3 Tx/Rx AIS (alarm indication signal); DS3 Tx/Rx degrade
STS/DS3-2 (Yellow)
STS/DS3-3 (Yellow)
ON (Green) This LED indicates that the unit is active and functioning correctly
FAIL (Red) This LED indicates one or more of the following equipment failure alarms: battery A and B; power; mapper (R96); TOP; Muldem; clock module; PAL chip; optics
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
Alarm indications
3-3
Figure 3-2DV-OC3 unit faceplate LED locations
FW-3100.1
ALARM STATUS
STS-DS3-1
UNITON
FAIL
OC3
STS-DS3-2
STS-DS3-3
In Out
CAUTIONAvoid direct exposureto beam. Invisible light can blind. Keep all optical connectors capped.
OC3 facility alarm LED (Yellow)LOS; LOF; Line AIS and FERF; Line, Section, and Signal degrade
STS-DS3 facility alarm LEDs (Yellow)STS: path AIS detect; yellow detect; path degrade; SPE Rx path unequipped; signal label mismatchDS3: Tx loss of signal; Tx bipolar code violation; Tx/Rx frame loss; Tx/Rx AIS; Tx/Rx degrade
ON LED (Green)Unit is active and functioning properly
FAIL LED (Red)Unit equipment failure: battery A or B; power; mapper; TOP; Muldem; clock module; parity; optics
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
3-4 Alarm indications
Figure 3-3Alarm hierarchy (higher-level alarms mask lower-level alarms)
Optical Line
OC3 Facility
DS3 Facility
Rx LOS
Rx LOF
Rx Line AIS
Rx Line FERF Rx Degrade
STS Rx Yellow
STS Rx Path AIS
STS Rx Path Unequipped
STS Rx
STS Rx
mismatch
DS3 Tx LOF
DS3 Tx AIS
STS-1
DS3
DS3 Rx LOS
DS3 Rx LOF
DS3
DS3 Rx AIS
DS3 Rx Degrade
DS3 Rx BPV
Signal label
Path Degrade
DS3 Tx Degrade
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
Alarm indications 3-5
Alarm port indicatorsAll equipment and facility alarms routed to the maintenance bus (M-bus) on the DV-45 shelf backplane are gathered by the MCU, classified as major or minor, and routed to parallel (relay closure) and serial (E2A TBOS) alarm ports at the rear of the DV-45 shelf (refer to Figure 3-4). Visual and audible indicators can be connected to the parallel, relay contact, port. A TBOS digital alarm scanner can be connected to the serial E2A1 RS-422 port. To determine alarm causes, see “Interpreting alarms and status indicators” on page 3-9.
Note: Orderwire capability is not supported.
Figure 3-4DV-45 shelf alarm port connections
FW-0301.1
ALARMS
MON1MON2NOC
NCNO
CNCEXT ACO
BAT RETNOC
NCNO
CNC
MAJVISMAJAUD
MINVISMINAUD
T+T-R+R-T+T-R+R-
12345678
E2A1E2A2
OW
JACK
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
3-6 Alarm indications
Parallel alarm port The parallel port provides normally open (NO) and normally closed (NC) relay connections for major and minor visual (for example, lamp) and audible (for example, buzzer) indicators. All major and minor alarm indicators are activated upon power failure. An external alarm cutoff (ACO) connection is provided so that audible alarm indicators can be silenced (see Figure 3-4).
Serial alarm port The serial alarm port is an industry standard E2A, RS-422, port (see Figure 3-4) which can represent up to 512 alarm points (each point is represented by one bit). The alarm points can be accessed through the port eight bits at a time by a TBOS digital alarm scanner. This section assumes you are familiar with TBOS; for a full description, see Alarms and Surveillance, 323-1401-102, within the DV-45 Reference Manual, PEC NT2H7902.
Alarm points are used to represent the same alarms as those routed to the LED faceplate indicators on the DV-OC3 unit. All alarm points are mapped to bits and bytes according to the DV-45 shelf position of the DV-OC3 unit. A DV-45 MCU can be optioned for TBOS 1.0 or TBOS 2.0 E2A mappings and display addresses (see Figure 8-10 on page 8-16). For TBOS 1.0 mappings, refer to Table 3-2. For TBOS 2.0 mappings, refer to Table 3-3, Table 3-4, Table 3-5, and Table 3-6; for TBOS 2.0, each DV-OC3 unit occupies an entire display.
Table 3-2TBOS 1.0 displays 0, 2, 4, 6 (MCU E2A addresses 00, 01, 10, 11—local only)
Bit 1 2 3 4 5 6 7 Bit 8Byte
0Shelf Minor Shelf
Major
DV-OC3 unit in shelf slots 0 and 1Byte
1OC3 Fac. Err.
STS1/DS3-3 Fac. Err.
STS1/DS3-2 Fac. Err.
STS1/DS3-1 Fac. Err.
Unit Fail
5 DS3-3 Fac. Lpb
DS3-2 Fac. Lpb
DS3-1 Fac. Lpb
DV-OC3 unit in shelf slots 2 and 3Byte
2OC3 Fac. Err.
STS1/DS3-3 Fac. Err.
STS1/DS3-2 Fac. Err.
STS1/DS3-1 Fac. Err.
Unit Fail
5 DS3-3 Fac. Lpb
DS3-2 Fac. Lpb
DS3-1 Fac. Lpb
DV-OC3 unit in shelf slots 4 and 5Byte
3OC3 Fac. Err.
STS1/DS3-3 Fac. Err.
STS1/DS3-2 Fac. Err.
STS1/DS3-1 Fac. Err.
Unit Fail
6 DS3-3 Fac. Lpb
DS3-2 Fac. Lpb
DS3-1 Fac. Lpb
DV-OC3 unit in shelf slots 6 and 7Byte
4OC3 Fac. Err.
STS1/DS3-3 Fac. Err.
STS1/DS3-2 Fac. Err.
STS1/DS3-1 Fac. Err.
Unit Fail
6 DS3-3 Fac. Lpb
DS3-2 Fac. Lpb
DS3-1 Fac. Lpb
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
Alarm indications 3-7
Table 3-3TBOS 2.0 displays 0, 4 (MCU E2A addresses 00, 01) for an OC3 unit in slots 0 & 1
Bit 1 2 3 4 5 6 7 Bit 8
Byte 0
OC3 Optical Degr.
OC3 Sect. Degr.
OC3 Line Degr.
Shelf Minor
OC3 Line AIS
OC3LOF
OC3 LOS
Shelf Major
1 OC3Line FERF
STS-3 Rx Eqp.
STS-3 Tx Eqp.
STS-2 Rx Eqp.
STS-2 Tx Eqp.
STS-1 Rx Eqp.
STS-1 Tx Eqp.
Unit Fail
2 STS-2 Path SigMis
STS-2 Path Uneqp
STS-2 Path AIS
STS-1 Path SigMis
STS-1 Path Uneqp
STS-1 Path AIS
3 STS-2 Path Degr.
DS3-2 Tx Degr.
DS3-2 Tx AIS
DS3-2 Tx LOF
STS-1 Path Degr.
DS3-1 Tx Degr.
DS3-1 Tx AIS
DS3-1 Tx LOF
4 DS3-2 Rx Degr.
DS3-2 Rx AIS
DS3-2 Rx Fail
STS-2 Path Yel.
DS3-1 Rx Degr.
DS3-1 Rx AIS
DS3-1 Rx Fail
STS-1 Path Yel.
3 DS3-2 LBO
DS3-1 LBO
DS3-1 Fac. Lpd Rq
STS-3 Path SigMis
STS-3 Path Uneqp
STS-3 Path AIS
6 Loop Timed
DS3-3 LBO
DS3-2 Fac. Lpd Rq
STS-3 Path Degr.
DS3-3 Tx Degr.
DS3-3 Tx AIS
DS3-3 Tx LOF
7 Config. Fail
DS3-3 Fac. Lpd Rq
DS3-3 Rx Degr.
DS3-3 Rx AIS
DS3-3 Rx Fail
STS-3 Path Yel.
Table 3-4TBOS 2.0 displays 1, 5 (MCU E2A addresses 00, 01) for an OC3 unit in slots 2 & 3
Bit 1 2 3 4 5 6 7 Bit 8
Byte 0
OC3 Optical Degr.
OC3 Sect. Degr.
OC3 Line Degr.
Com. Chan. Fail
OC3 Line AIS
OC3LOF
OC3 LOS
Remote Alarm
1 OC3Line FERF
STS-3 Rx Eqp.
STS-3 Tx Eqp.
STS-2 Rx Eqp.
STS-2 Tx Eqp.
STS-1 Rx Eqp.
STS-1 Tx Eqp.
Unit Fail
2 STS-2 Path SigMis
STS-2 Path Uneqp
STS-2 Path AIS
STS-1 Path SigMis
STS-1 Path Uneqp
STS-1 Path AIS
3 STS-2 Path Degr.
DS3-2 Tx Degr.
DS3-2 Tx AIS
DS3-2 Tx LOF
STS-1 Path Degr.
DS3-1 Tx Degr.
DS3-1 Tx AIS
DS3-1 Tx LOF
4 DS3-2 Rx Degr.
DS3-2 Rx AIS
DS3-2 Rx Fail
STS-2 Path Yel.
DS3-1 Rx Degr.
DS3-1 Rx AIS
DS3-1 Rx Fail
STS-1 Path Yel.
3 DS3-2 LBO
DS3-1 LBO
DS3-1 Fac. Lpd Rq
STS-3 Path SigMis
STS-3 Path Uneqp
STS-3 Path AIS
6 Loop Timed
DS3-3 LBO
DS3-2 Fac. Lpd Rq
STS-3 Path Degr.
DS3-3 Tx Degr.
DS3-3 Tx AIS
DS3-3 Tx LOF
7 Config. Fail
DS3-3 Fac. Lpd Rq
DS3-3 Rx Degr.
DS3-3 Rx AIS
DS3-3 Rx Fail
STS-3 Path Yel.
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
3-8 Alarm indications
Table 3-5TBOS 2.0 displays 2, 6 (MCU E2A addresses 00, 01) for an OC3 unit in slots 4 & 5
Bit 1 2 3 4 5 6 7 Bit 8
Byte 0
OC3 Optical Degr.
OC3 Sect. Degr.
OC3 Line Degr.
Power Fail
OC3 Line AIS
OC3LOF
OC3 LOS
Batt. Fail
1 OC3Line FERF
STS-3 Rx Eqp.
STS-3 Tx Eqp.
STS-2 Rx Eqp.
STS-2 Tx Eqp.
STS-1 Rx Eqp.
STS-1 Tx Eqp.
Unit Fail
2 STS-2 Path SigMis
STS-2 Path Uneqp
STS-2 Path AIS
STS-1 Path SigMis
STS-1 Path Uneqp
STS-1 Path AIS
3 STS-2 Path Degr.
DS3-2 Tx Degr.
DS3-2 Tx AIS
DS3-2 Tx LOF
STS-1 Path Degr.
DS3-1 Tx Degr.
DS3-1 Tx AIS
DS3-1 Tx LOF
4 DS3-2 Rx Degr.
DS3-2 Rx AIS
DS3-2 Rx Fail
STS-2 Path Yel.
DS3-1 Rx Degr.
DS3-1 Rx AIS
DS3-1 Rx Fail
STS-1 Path Yel.
3 DS3-2 LBO
DS3-1 LBO
DS3-1 Fac. Lpd Rq
STS-3 Path SigMis
STS-3 Path Uneqp
STS-3 Path AIS
6 Loop Timed
DS3-3 LBO
DS3-2 Fac. Lpd Rq
STS-3 Path Degr.
DS3-3 Tx Degr.
DS3-3 Tx AIS
DS3-3 Tx LOF
7 Config. Fail
DS3-3 Fac. Lpd Rq
DS3-3 Rx Degr.
DS3-3 Rx AIS
DS3-3 Rx Fail
STS-3 Path Yel.
Table 3-6TBOS 2.0 displays 3, 7 (MCU E2A addresses 00, 01) for an OC3 unit in slots 6 & 7
Bit 1 2 3 4 5 6 7 Bit 8
Byte 0
OC3 Optical Degr.
OC3 Sect. Degr.
OC3 Line Degr.
OC3 Line AIS
OC3LOF
OC3 LOS
1 OC3 Line FERF
STS-3 Rx Eqp.
STS-3 Tx Eqp.
STS-2 Rx Eqp.
STS-2 Tx Eqp.
STS-1 Rx Eqp.
STS-1 Tx Eqp.
Unit Fail
2 STS-2 Path SigMis
STS-2 Path Uneqp
STS-2 Path AIS
STS-1 Path SigMis
STS-1 Path Uneqp
STS-1 Path AIS
3 STS-2 Path Degr.
DS3-2 Tx Degr.
DS3-2 Tx AIS
DS3-2 Tx LOF
STS-1 Path Degr.
DS3-1 Tx Degr.
DS3-1 Tx AIS
DS3-1 Tx LOF
4 DS3-2 Rx Degr.
DS3-2 Rx AIS
DS3-2 Rx Fail
STS-2 Path Yel.
DS3-1 Rx Degr.
DS3-1 Rx AIS
DS3-1 Rx Fail
STS-1 Path Yel.
3 DS3-2 LBO
DS3-1 LBO
DS3-1 Fac. Lpd Rq
STS-3 Path SigMis
STS-3 Path Uneqp
STS-3 Path AIS
6 Loop Timed
DS3-3 LBO
DS3-2 Fac. Lpd Rq
STS-3 Path Degr.
DS3-3 Tx Degr.
DS3-3 Tx AIS
DS3-3 Tx LOF
7 DS3-3 Fac. Lpd Rq
DS3-3 Rx Degr.
DS3-3 Rx AIS
DS3-3 Rx Fail
STS-3 Path Yel.
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
Alarm indications 3-9
Interpreting alarms and status indicatorsAll alarms are classified as minor or major; the possible alarm and status conditions are listed in Table 3-7 and Table 3-8 to help you determine the cause of the alarm.
Table 3-7Minor alarm and status indications
LED Possible Alarm Point and Signal Description
OC3 (Yellow) • OC3 Line Degrade: the received OC3 optical signal has a line BER (bit error rate) higher than 10 -6
• OC3 Section Degrade: the received OC3 optical signal has a section BER (bit error rate) higher than 10 -6
• OC3 Optical Degrade: the received OC3 optical signal is attentuated without traffic degradation
Note: In TBOS 1.0, all OC3 facility alarms are represented with the OC3 Facility Error E2A alarm point
STS/DS3-1 (Yellow)STS/DS3-2 (Yellow)STS/DS3-3 (Yellow)
• STS Rx Path Unequipped: generated when the STS Tx DS3 facility has been deactivated at another shelf; or a DS3 blue signal has been detected from another shelf
• STS Rx Path Signal Degrade: the STS1 has a BER (bit error rate) higher than 10-6
• DS3 Rx Degrade: a DS3 signal with a BER (bit error rate) higher than 10-6 has been detected on a DS3 input
• DS3 Tx Degrade: a DS3 signal with a BER (bit error rate) higher than 10-6 has been detected on a DS3 output
Note: In TBOS 1.0, all STS1 and DS3 facility alarms are represented by a STS1/DS3-# Facility Error E2A alarm point
Table 3-8 Major alarm and status indications
Alarm LED Possible Alarm Point and Signal Description
OC3 (Yellow) • OC3 LOS (loss of signal): the optical fiber is disconnected; or a Line FERF has been detected from another shelf
• OC3 LOF (loss of frame): the SONET frame is corrupted without optical signal degradation; or a Line FERF has been detected from another shelf
• OC3 Line AIS (alarm indication signal): generated when received from another shelf; or a Line FERF has been detected from another shelf
• OC3 Line FERF (far-end receive failure): an OC3 LOS, OC3 LOF, or OC3 Line AIS has been detected from another shelf
Note: In TBOS 1.0, all OC3 facility alarms are represented with the OC3 Facility Error E2A alarm point
—continued—
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
3-10 Alarm indications
STS/DS3-1 (Yellow)STS/DS3-2 (Yellow)STS/DS3-3 (Yellow)
• STS Rx Path AIS (alarm indication signal): an AIS has been inserted in the SONET overhead and STS Rx Yellow has been sent to another shelf
• STS Path Signal Label Mismatch: the C2 byte has not been set to the allowed C2 bytes (00=unequipped, 01=equipped-non specific payload, 04=asynchronous mapping for DS3)
• STS Rx Yellow: an STS Rx Path AIS alarm exists at another shelf
• DS3 Rx Fail: a DS3 Rx LOS, BPV, or LOF failure has occurred and DS3 Tx AIS has been sent to another shelf to indicate a DS3 LOS or DS3 Tx LOF failure; a DS3 Rx Degrade minor alarm indicates a DS3 BPV failure at another shelf
• DS3 Rx AIS: a DS3 blue signal has been fed into a DS3 input
• DS3 Tx LOF (loss of frame): the payload of an unframed DS3 has been received
• DS3 Tx AIS (alarm indication signal): a DS3 blue signal has been sent out a DS3 output
Note: In TBOS 1.0, all STS1 and DS3 facility alarms are represented by the STS/DS3-# Facility Error E2A alarm point
FAIL (Red) • Battery Fail: battery A or B has failed or backplane fuse A or B is defective
• Unit Fail: hardware failure
• Configuration Fail: an DV-OC3 unit has been inserted in a slot position other than 0, 2, 4, or 6
• Communication Channel Fail: the communication channel between the DV-OC3 unit and the MCU is corrupted
Note: All equipment failure alarms are represented by the Unit Fail E2A alarm point. The Communication Channel Fail E2A alarm point is reported in TBOS 2.0 Displays 1 and 5 and is the result of a Communication Fail alarm from any DV-45 unit
—end—
Table 3-8 (continued)Major alarm and status indications
Alarm LED Possible Alarm Point and Signal Description
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
4-1
DV-OC3 unit applications 4-DV-OC3 units can be used in bidirectional and unidirectional modes of operation. This chapter describes the use of DV-OC3 units in typical bidirectional and unidirectional applications and five specific applications:
• bidirectional applications
• unidirectional applications
• single DS3 feed application
• multiple DS3 feed application
• data interface application
• hubbing to an OC12 application
• hubbing from a DVN application
Bidirectional applicationsTypical bidirectional applications include:
• point-to-point between DV-OC3 units (see Figure 4-1)
• point-to-point between a DV-OC3 unit and a SONET OC3 TBM shelf (see Figure 4-2)
• DV-OC3 unit interfacing as a tributary to a SONET OC12 TBM transport shelf (see Figure 4-3).
In each application, the default DV-OC3 unit switch 1 and switch 2 options (all set to 1) would be used.
Figure 4-1Point-to-point between DV-OC3 units
DV-OC3 DV-OC3
DS3DS3
o
o
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
4-2 DV-OC3 unit applications
Figure 4-2Point-to-point between a DV-OC3 unit and an OC3 TBM shelf
Figure 4-3DV-OC3 unit interfacing as a tributary to an OC12 TBM transport shelf
Unidirectional applicationsUnidirectional DV-OC3 unit applications may take two forms. In the first form, only DS3 signals are transmitted from a site (see site A in Figure 4-4). In the second form, DS3 signals are received and then the same or a different DS3 signal is reinserted (see site B in Figure 4-4) for transmission to the next site (see site C in Figure 4-4). In the second form, the DV-OC3 unit acts as an Add/Drop multiplexer.
Figure 4-4Unidirectional applications
DV-OC3 OC3 TBM
DS3DS3
o
o
DV-OC3 OC3
DS3
o
oOC12
o
o
OC12 TBM Shelf
DV-OC3
DS3
DS3
o o
DV-OC3
OC3, OC12, or DV-OC3
site A site B site C
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
DV-OC3 unit applications 4-3
DV-OC3 unit switch 1 and switch 2 settings for each site shown in Figure 4-4 are shown in Table 4-1. Also see “Setting DV-OC3 unit options” on page 8-7.
Note 1: Setting DV-OC3 unit Sw2-8 to “Unidirectional” masks the line FERF signal being transmitted on a Rx line failure and prevents the echo of the K bytes. If a DV-OC3 unit is NOT being used, the Line FERF alarm must be turned OFF on the OC3 or OC12 product.
Note 2: DV-OC3 units do not support SONET DCC; therefore, the SONET DCC link fail alarm will always be ON. The alarm must be turned OFF on the OC3 and OC12 product.
Note 3: When a DV-OC3 unit STS channels are set as “Unequipped”, a STS Rx Unequipped alarm will be generated. The alarm must be turned OFF on the OC3 and OC12 product.
Note 4: See Provisioning and Operations Procedures, 323-1111-310, for alarm provisioning on Nortel OC3 and OC12 TBM shelf products.
Table 4-1Unidirectional DV-OC3 unit switch settings
Switch Label Site A Site B Site C
Sw1-1 STS Tx1 Equipped Equipped Unequipped
Sw1-2 STS Rx1 Unequipped Equipped Equipped
Sw1-3 STS Tx2 Equipped Equipped Unequipped
Sw1-4 STS Rx2 Unequipped Equipped Equipped
Sw1-5 STS Tx3 Equipped Equipped Unequipped
Sw1-6 STS Rx3 Unequipped Equipped Equipped
Sw1-7 OC3 Rx Unequipped Equipped Equipped
Sw1-8 Loop Freerun Loop Timed Loop Timed
Sw2-1 LBO1 On (=1) On (=1) On (=1)
Sw2-2 LBO2 On (=1) On (=1) On (=1)
Sw2-3 LBO3 On (=1) On (=1) On (=1)
Sw2-4 unused
Sw2-5 STS-1 Unidirectional Unidirectional Unidirectional
Sw2-6 STS-2 Unidirectional Unidirectional Unidirectional
Sw2-7 STS-3 Unidirectional Unidirectional Unidirectional
Sw2-8 OC3 Unidirectional Unidirectional Unidirectional
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
4-4 DV-OC3 unit applications
Single DS3 feed applicationNortel’s Digital Video Network (DVN) room sites use a Video Codec Enclosure (VCE) that houses a DV-45 shelf equipped with units for processing and transmitting video, audio, and control data between DVN rooms. Figure 4-5 shows the equipment required for a single DS3 signal fed into one DVN room. One bidirectional DS3 signal from the DV-OC3 unit is connected to the DCS card; the other two DV-OC3 DS3 channels would be optioned as unequipped. Input and output connections to the fiber network are made from the front of the DV-OC3 unit.
Figure 4-5DV-OC3 unit used with a single DS3 signal
Coder
DCS
DV-OC3
o
o
Tx
Rx
DecoderDS3-1
DS3-2
DS3-3
Unu
sed
Audio & video
Audio & video
X.25 2xT1
Control
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
DV-OC3 unit applications 4-5
Multiple DS3 feed applicationFigure 4-6 illustrates the equipment required to handle three DS3 signals fed into one DVN room. One bidirectional DS3 signal from the DV-OC3 unit is connected to a DV-45 DCS card; the other two DV-OC3 DS3 channels would be optioned as unidirectional. Input and output connections to the fiber network are made from the front of the DV-OC3 unit.
Figure 4-6DV-OC3 unit used with multiple DS3 signals
DV-45Coder
DCS
DV-45Decoder
DV-45Decoder
DV-45Decoder
Control
RoomMonitor
Audio
Audio
Audio
Audio
RoomMonitor
RoomMonitor
X.252x T1
MCU Tx
RxDV
-OC
3
VCR
Laser
Other
Disk
Roo
m V
ideo
Sw
itch
DV-45 shelf
DS3-1
DS3-2
DS3-3
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
4-6 DV-OC3 unit applications
Data interface applicationsFigure 4-7 illustrates the equipment required to handle two bidirectional DS3 signals. One bidirectional DS3 signal from the DV-OC3 unit is connected to a DV-45 DCS card; the second bidirectional DS3 signal is connected to an external SMDS or Frame Relay data interface; the third DS3 channel would be optioned as unequipped.
Figure 4-7Handling a single data interface
Figure 4-8 illustrates the equipment required to handle three bidirectional DS3 signals. Each bidirectional DS3 signal from the DV-OC3 unit is connected to a DCS card; each DCS card is connected to four DS1 data signals. A fully utilized DV-OC3 unit can handle 12 DS1 data signals. In this application, the DV-OC3 unit would use the default factory-set options.
Figure 4-8Handling multiple data interfaces
Control
DCS
DV-OC3
Data I/F
Coder
Decoder
DS3-1
DS3-2
DS3-3
/2
DS-1
SDMS,
Frame Relay
Audio & video
Audio & video Tx
Rx
DCS
DCS
DCS
DV-OC3
Tx
Rx
DS3-1
DS3-2
DS3-3
4 DS1
/
4 DS1
/
4 DS1
/
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
DV-OC3 unit applications 4-7
Hubbing to an OC12 applicationFigure 4-9 shows a DV-45 system handling 12 bidirectional DS3 signals. Each bidirectional DS3 signal is connected to an DV-OC3 unit DS3 input and output; the DV-OC3 unit OC3 optical inputs and outputs are connected to the OC3 optical tributary input and output connections on the OC12 terminal. A fully equipped DV-45 shelf can handle four DV-OC3 units and 12 bidirectional DS3 signals. In this application, each DV-OC3 unit would use the default factory-set options.
Figure 4-9Connecting 12 DS3 signals to an OC12 unit
DV-OC3
DV-OC3
DV-OC3
SO
NE
T O
C-1
2 T
erm
inal
3 DS3
/
3 DS3
/
3 DS3
/
DV-OC33 DS3
/
DV-45 shelf
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
4-8 DV-OC3 unit applications
Hubbing from a DVN applicationFigure 4-10 shows the equipment for handling 12 DS3 signals in a Digital Video Network (DVN) application. The DV-OC3 unit is equipped in a DV-45 shelf within a VCE located at each room site. Each OC3 optical signal, containing the room audio and video signals encoded as a DS3 signal, is sent to the local service providers’s equipment office where it is hubbed to a DV-45 shelf. At this point, the service provider has access to the DS3 signals from the rooms to either connect to a DS3 routing switch or input to a backbone fiber optic transmission system (FOTS). In this application, each DV-OC3 unit at the service provider equipment office, would use the default factory-set options.
Figure 4-10DVN hubbing application
Dec
oder
Cod
er
DC
S
Dec
oder
DV
-OC
3
Dec
oder
Bla
nk
Bla
nk
MC
U
VCE
Room A
MCU
Blank
DV-OC3
DV-OC3
DV-OC3
DV-OC3
3 DS3s
To / from DS3
Routing Switch
or
Backbone FOTS
3 DS3s
3 DS3s
3 DS3s
OC3
OC3
OC3
OC3
Service ProviderEquipment Office
Dec
oder
Cod
er
DC
S
Dec
oder
DV
-OC
3
Dec
oder
Bla
nk
Bla
nk
MC
U
VCE
Room B
Dec
oder
Cod
er
DC
S
Dec
oder
DV
-OC
3
Dec
oder
Bla
nk
Bla
nk
MC
U
VCE
Room C
Dec
oder
Cod
er
DC
S
Dec
oder
DV
-OC
3
Dec
oder
Bla
nk
Bla
nk
MC
U
VCE
Room D
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
5-1
Ordering information 5-This chapter provides the information required for provisioning and ordering DV-45 DV-OC3 units. Ordering information for equipment directly related to DV-OC3 unit provisioning is included. For other DV-45 equipping rules refer to Ordering Information, 323-1401-151, within the DV-45 Reference Manual, PEC NT2H7902.
DV-OC3 units can be used in a number of different applications. To assist you in provisioning DV-OC3 units, two typical configurations are described.
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
5-2 Ordering information
Typical configurationsTwo typical configurations are described: four DV-OC3 units in a DV-45 shelf; and one DV-OC3 unit within a DV-45 shelf.
Four DV-OC3 units in a DV-45 shelfTypically, this configuration would be used in a DV-45 shelf within a 7-ft. mounting bay, at a Digital Video Network (DVN) cell switching site. The DV-OC3 units provide an optical interface to an optical fiber transmission network used to interconnect DVN sites. See Figure 5-1.
Figure 5-1DV-45 shelf fully equipped with DV-OC3 units
FW-3102
Note: A fully-equipped DV-45 shelf configuration could also be used with low-cost hubbing applications; for example, feeding 12 DS3 signals to an OC12 system that accepts four OC3 inputs and outputs one OC12 signal.
FW 3102
Position #
MCU
CAUTION CAUTION CAUTIONCAUTION
0 1 2 3 4 5 6 7 8 9 10
OC3OC3OC3 OC3
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
Ordering information 5-3
One DV-OC3 unit within a DV-45 shelfTypically, this configuration would be used in a DV-45 shelf within a Video Codec Enclosure (VCE) at a DVN room site. This configuration provides for three DS3 feeds into the same room. The DV-OC3 unit provides an optical interface to an optical fiber transmission network used to connect to a DVN cell switching site. See Figure 5-2.
Figure 5-2DV-45 shelf equipped with one DV-OC3 unit
FW-3101.1
Note: A DV-OC3 unit can be optioned to handle a single bidirectional DS3 signal by setting unused STS-1 channels to unequipped.
Decoder
CAUTION
Decoder
Position #
DecoderCoder MCUDCS
0 1 2 3 4 5 6 7 8 9 10
OC3
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
5-4 Ordering information
Provisioning DV-OC3 unitsMajor equipment produced by Nortel is identified with a product engineering code (PEC). Use the circuit pack code (CPC) to order equipment from Nortel. The Bellcore common language equipment identifier (CLEI) is also used to identify equipment.
Note: DV-OC3 units can be used in an existing DV-45 shelf if the existing DV-45 MCU is upgraded to NT2H35LA vintage. For NT2H35CA/EA MCUs, the upgrade can be made by replacing the EPROMs.
Table 5-1 DV-OC3 unit equipping guidelines
DV-OC3 Equipping
Rule #
Rule Description Ordering Codes
PEC CPC CLEI
1 Order IR FC connector DV-OC3 units according to your configuration; up to a maximum of four per DV-45 shelf (DV-OC3 units can only be installed in shelf slots 0 and 1, 2 and 3, 4 and 5, or 6 and 7)
NT2H08BB A0615639 voiuca01aa
2 Order IR ST connector DV-OC3 units according to your configuration; up to a maximum of four per DV-45 shelf (DV-OC3 units can only be installed in shelf slots 0 and 1, 2 and 3, 4 and 5, or 6 and 7)
NT2H08BC A0615640 voiuba01aa
3 Order IR SC connector DV-OC3 units according to your configuration; up to a maximum of four per DV-45 shelf (DV-OC3 units can only be installed in shelf slots 0 and 1, 2 and 3, 4 and 5, or 6 and 7)
NT2H08BD A0615641 voiuaa01aa
4 Order LR FC connector DV-OC3 units according to your configuration; up to a maximum of four per DV-45 shelf (DV-OC3 units can only be installed in shelf slots 0 and 1, 2 and 3, 4 and 5, or 6 and 7)
NT2H08AB A0615636 voiufa01aa
5 Order LR ST connector DV-OC3 units according to your configuration; up to a maximum of four per DV-45 shelf (DV-OC3 units can only be installed in shelf slots 0 and 1, 2 and 3, 4 and 5, or 6 and 7)
NT2H08AC A0615637 voiuea01aa
6 Order LR SC connector DV-OC3 units according to your configuration; up to a maximum of four per DV-45 shelf (DV-OC3 units can only be installed in shelf slots 0 and 1, 2 and 3, 4 and 5, or 6 and 7)
NT2H08AD A0615638 voiuda01aa
—continued—
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
Ordering information 5-5
7 Order one DV-OC3 unit of each type used in the system as a spare
8 Order one MCU EPROM upgrade kit for existing DV-45 MCUs (NT2H35EA or earlier) that have to handle DV-OC3 units
NT2H99LA A0635821
9 Order one DV-45 MCU for each new DV-45 shelf equipped with DV-OC3 units
NT2H35LA A0618350 votrwcx3aa
10 Order one DV-45 shelf to house up to 4 DV-OC3 units. A DV-45 shelf can be mounted in 483.0 mm (19 in.) or 584.0 mm (23 in.) bays, adjustable mounting brackets are provided with the shelf. A maximum of four DV-45 shelves can be mounted in a 7-ft. bay
NT2H50AC A0349030
11 Order a heat deflector with fiber management for each new and existing DV-45 shelf equipped with DV- OC3 units (to be mounted above each DV-45 shelf)
NT2H51AC A0617282 vomyacnzaa
12 Order double blank information cards as required to fill empty DV-45 shelf positions (required for proper EMI shielding)
NT2H39AA A0349016 vopq2701aa
13 Order one DV-45 Reference Manual for each location that uses DV-OC3 units
NT2H79AA A0350651
14 Order additional DV-45 DV-OC3 Unit Reference Manual, 240-1401-380, as required
NT2H7908 A0635597
15 Order 6 BNC right-angle adapters for use with each DV-OC3 unit
CX01APJ75RT A0361070
16 Order VCE cabinet equipped with knockout panel, DV-45 shelf, power supply, and 10 ft. ac-power cord
NT2H57AA A0626349
17 Order 60 in. cabinet equipped with power supply, FMT-150B, DV-45 shelf, DSX3 X-connect panel, and fuse and alarm panel. 120V 240V
NT7N60ABNT7N60AC
A0623736A0623737
18 Order fiber and DS3 cable as required(see Table 5-2)
see Table 5-2 see Table 5-2
—end—
Table 5-1 (continued)DV-OC3 unit equipping guidelines
DV-OC3 Equipping
Rule #
Rule Description Ordering Codes
PEC CPC CLEI
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
5-6 Ordering information
Table 5-2 Fiber and DS3 cable ordering codes
Cable description PEC CPC
Fiber cables
SM Optical Patchcord (FC-FC) 5 m (16 ft) NT7E46BA A0365303
SM Optical Patchcord (FC-FC) 10 m (33 ft) NT7E46BB A0365304
SM Optical Patchcord (FC-FC) 15 m (49 ft) NT7E46BC A0365305
SM Optical Patchcord (FC-FC) 20 m (66 ft) NT7E46BD A0365306
SM Optical Patchcord (FC-FC) 30 m (98 ft) NT7E46BE A0388572
SM Optical Patchcord (ST-ST) 5 m (16 ft) NT7E46CA A0351099
SM Optical Patchcord (ST-ST) 10 m (33 ft) NT7E46CB A0351100
SM Optical Patchcord (ST-ST) 15 m (49 ft) NT7E46CC A0351101
SM Optical Patchcord (ST-ST) 20 m (66 ft) NT7E46CD A0351102
SM Optical Patchcord (ST-ST) 30 m (98 ft) NT7E46CE A0388573
SM Optical Patchcord (SC-SC) 5 m (16 ft) NT7E46FA A0408374
SM Optical Patchcord (SC-SC) 10 m (33 ft) NT7E46FB A0408375
SM Optical Patchcord (SC-SC) 15 m (49 ft) NT7E46FC A0408376
SM Optical Patchcord (SC-SC) 20 m (66 ft) NT7E46FD A0408377
SM Optical Patchcord (SC-SC) 30 m (98 ft) NT7E46FE A0408378
SM Optical Patchcord with mVOA (FC-FC) 5 m (16 ft.) NT7E47BA A0358876
SM Optical Patchcord with mVOA (FC-FC) 10 m (33 ft.) NT7E47BB A0365410
SM Optical Patchcord with mVOA (FC-FC) 15 m (49 ft.) NT7E47BC A0365411
SM Optical Patchcord with mVOA (FC-FC) 20 m (66 ft.) NT7E47BD A0365412
SM Optical Patchcord with mVOA (FC-FC) 30 m (98 ft.) NT7E47BE A0388575
SM Optical Patchcord with mVOA (ST-ST) 5 m (16 ft.) NT7E47CA A0358877
SM Optical Patchcord with mVOA (ST-ST) 10 m (33 ft.) NT7E47CB A0351096
SM Optical Patchcord with mVOA (ST-ST) 15 m (49 ft.) NT7E47CC A0351097
SM Optical Patchcord with mVOA (ST-ST) 20 m (66 ft.) NT7E47CD A0351098
SM Optical Patchcord with mVOA (ST-ST) 30 m (98 ft.) NT7E47CE A0388576
SM Optical Patchcord with mVOA (SC-SC) 5 m (16 ft.) NT7E47FA A0408379
SM Optical Patchcord with mVOA (SC-SC) 10 m (33 ft.) NT7E47FB A0408380
SM Optical Patchcord with mVOA (SC-SC) 15 m (49 ft.) NT7E47FC A0408381
SM Optical Patchcord with mVOA (SC-SC) 20 m (66 ft.) NT7E47FD A0408382
SM Optical Patchcord with mVOA (SC-SC) 30 m (98 ft.) NT7E47FE A0408383
SM Optical Pigtail (FC) 20 m (66 ft) NT7E48BA A0365308
SM Optical Pigtail (ST) 20 m (66 ft) NT7E48CA A0371187
SM Optical Pigtail (SC) 20 m (66 ft) NT7E48FA A0408384
—continued—
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
Ordering information 5-7
SM Optical Pigtail with mVOA (FC) 20 m (66 ft) NT7E49BA A0365416
SM Optical Pigtail with mVOA (ST) 20 m (66 ft) NT7E49CA A0371188
SM Optical Pigtail with mVOA (SC) 20 m (66 ft) NT7E49FA A0408385
Electrical cables
BNC connector for 734A Coaxial Cable CX01PS007 A060865
DS3 734A Coaxial Cable (BNC) 5 m (16 ft.) NT7E43AA A0351121
DS3 734A Coaxial Cable (BNC) 10 m (33 ft.) NT7E43AB A0370975
DS3 734A Coaxial Cable (BNC) 20 m (66 ft.) NT7E43AC A0370976
DS3 734A Coaxial Cable (BNC) 30 m (98 ft.) NT7E43AD A0370977
DS3 734A Coaxial Cable (BNC) 40 m (131 ft.) NT7E43AE A0370978
DS3 734A Coaxial Cable (BNC) 50 m (164 ft.) NT7E43AF A0370979
DS3 734A Coaxial Cable (BNC) 60 m (197 ft.) NT7E43AG A0370980
DS3 734A Coaxial Cable (BNC) 75 m (246 ft.) NT7E43AH A0370981
DS3 734A Coaxial Cable (BNC) 80m (262 ft.) NT7E43AJ A0373188
DS3 734A Coaxial Cable (BNC) 140 m (459 ft.) NT7E43AK A0373189
DS3 734A Coaxial Cable (BNC) 100 m (328 ft.) NT7E43AL A0375153
BNC connector for 735A Coaxial Cable CX01PS008 A060866
DS3 735A Coaxial Cable (BNC) 5 m (16 ft.) NT7E43BA A0408003
DS3 735A Coaxial Cable (BNC) 10 m (33 ft.) NT7E43BB A0408004
DS3 735A Coaxial Cable (BNC) 20 m (66 ft.) NT7E43BC A0408005
DS3 735A Coaxial Cable (BNC) 30 m (98 ft.) NT7E43BD A0408006
DS3 735A Coaxial Cable (BNC) 40 m (131 ft.) NT7E43BE A0408007
DS3 735A Coaxial Cable (BNC) 50 m (164 ft.) NT7E43BF A0408008
DS3 735A Coaxial Cable (BNC) 60 m (197 ft.) NT7E43BG A0408009
DS3 735A Coaxial Cable (BNC) 75 m (246 ft.) NT7E43BH A0408010
BNC connector for RG59 Coaxial Cable CX01PS009 A0619904
DS3 RG-59B/U Coaxial Cable (BNC) 5 m (16 ft.) NT7E42AA A0364731
DS3 RG-59B/U Coaxial Cable (BNC) 10 m (33 ft.) NT7E42AB A0365949
DS3 RG-59B/U Coaxial Cable (BNC) 20 m (66 ft.) NT7E42AC A0365950
DS3 RG-59B/U Coaxial Cable (BNC) 30 m (98 ft.) NT7E42AD A0365951
DS3 RG-59B/U Coaxial Cable (BNC) 40 m (131 ft.) NT7E42AE A0365952
DS3 RG-59B/U Coaxial Cable (BNC) 50 m (164 ft.) NT7E42AF A0365953
DS3 RG-59B/U Coaxial Cable (BNC) 60 m (197 ft.) NT7E42AG A0365954
DS3 RG-59B/U Coaxial Cable (BNC) 75 m (246 ft.) NT7E42AH A0365955
—end—
Table 5-2 (continued)Fiber and DS3 cable ordering codes
Cable description PEC CPC
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
5-8 Ordering information
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
6-1
Technical specifications 6-Table 6-1 summarizes the technical specifications (size, power requirements, interfaces—DS3 and OC3) for a DV-OC3 unit. Also see Technical Specifications, 323-1401-180, in the DV-45 Reference Manual, PEC NT2H7902.
Table 6-1 DV-OC3 unit technical specifications
Parameter Specification
General: • CSA/UL standards
• Packaging
• Alarm indications
• Safety
• MTBF
• MTTR
• Input connections
• Output connections
• Internal protection
• UL-1459; CAN/CSA C22.2 No. 225-M90; NEC (US)
• Fits in two slot positions in a DV-45 shelf
• Faceplate LEDs, parallel relay, and serial TBOS
• Nortel std #90001.12 and TA-NWT-1089, section 7
• 15 years (Bellcore v 3.0)
• 15 minutes (excluding travel time)
• One front FC, ST, or SC input connection
• Three rear DS3 BNC input connections
• One front FC, ST, or SC output connection
• Three rear DS3 BNC output connections
• None (could be provided using external DS3 switch boxes)
Power: • Voltage
• Dissipation
• Battery noise
• Electrostatic discharge
• -48 Vdc (-42 to -56)
• 30 watts
• Complies with TR-NWT-499
• 3 kV: no DS3 errors or picture defects; 6kV: < 100 errors or picture defect on one line; 8kV: no DS3 frame loss, alarm, or freeze frame; 20kV: no damage to equipment(Bellcore TR-TSY-000078 and TR-NWT-002089)
—continued—
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
6-2 Technical specifications
Environmental:• Temperature
• Relative humidity
• Electromagnetic interference
• Altitude
• Earthquake
• Flammability
• Shock
• Vibration
• Transportation bounce
• Normal: 0 to 40oC Short-term (< 72 hrs): 0 to 50oC Storage: -50 to +70oC
• Operating: 20 to 95%, 3.6 kPa vapour pressure Storage: 10 to 95%, 5.3 kPa vapour pressure
• Bellcore TR-NWT-002089 standard and FCC part 15, subpart B. class A
• Operating: to 4,000 m; Shipping: to15,000 m
• Zone IV
• Bellcore TR-TSY-0000063, TR-NWT-001089, NT std #4118.00
• Shipment drop height: 750 mm Unpacked drop height: 102 mm
• Operating: NEBS 5.6.3 Test 5CShipping: IEC 68-2-6 Test Fc Curve B
• Complies with IEC Draft 58
DS3 Interface:• Line rate
• Line code
• Line impedance
• Electrical standards
• Connector type
• 44.736 Mbit/s ± 20 ppm
• Bipolar with B3ZS
• 75 ohms ± 5% unbalanced
• TR-NWT-000499
• BNC at the rear of the DV-45 shelf
OC3 Interface:• Optical standard
• Maximum Tx power
• Minimum Tx power
• Extinction ratio
• Rx (IN) overload
• Rx sensitivity (at 1 x 10 -10 BER)
• Connector type
• SONET compatibility
• SONET TR-NWT-253 (non-compliance)
• OC3c
• SONET TR-NWT-000253 Intermediate reach (IR-1) and Long reach (LR-1) MLM OC3 at 1310 nm
• Long reach: 0 dBm; intermediate reach: -8 dBm
• Long reach: -5 dBm; intermediate reach: -15 dBm
• Long reach: 10; intermediate reach: 8.2
• Long reach: -10 dBm; intermediate reach: -8 dBm
• Long reach: -34 dBm; intermediate reach: -28 dBm
• FC, ST, or SC connectors on the front of the unit
• Connects to Nortel S/DMS Transport Node equipment and other vendor SONET equipment without raising alarms (for unidirectional, line FERF must be disabled)
• Orderwire (E1, E2); Section DCC (D1-3); Line DCC (D4-D12); APS signaling (K1, K2) disabled and a fixed code used (K2 bits 6-8 used to signal AIS and FERF); STS path trace (J1)
• not supported
Table 6-1 (continued)DV-OC3 unit technical specifications
Parameter Specification
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
7-1
Observing safety guidelines 7-This chapter describes the precautions that should be observed for the following:
• handling and working with DV-45 shelves
• handling, storing, installing, and replacing DV-45 units
• handling, splicing, and repairing optical fibers
DV-45 shelfThe following precaution must be taken when handling and working with a DV-45 shelf (this includes external cabinets, DV-45 shelves mounted inside the cabinets, and DV-45 units mounted in DV-45 shelves).
Wear a skin-contact antistatic bracelet when handling and working with a DV-45 shelf. This bracelet consists of an expandable wrist strap and grounding cord; its function is to rapidly dissipate charges to ground. Alternative personnel ground methods can be used; for example, conductive carpeting, conductive shoes, or heel grounding assemblies. An electrostatic discharge jack is located on the front of all heat deflectors equipped with fiber management.
DV-45 units Damage to units, particularly those that are sensitive to static electricity, may occur at any time. DV-45 units that are sensitive to static electricity are shipped in antistatic shipping bags and are marked with the following symbol.
Note: All DV-45 units must be installed or extracted by using the unit latches to ensure a secure mating with the backplane.
CAUTIONElectrostatic-sensitive devicesAvoid touching any components on the printed circuit board. Electrostatic-sensitive devices can be damaged by electrostatic discharge. Always ground yourself before handling a board.
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
7-2 Observing safety guidelines
Handling unitsThe following precautions must be taken when handling DV-45 units:
• Wear a skin-contact antistatic bracelet when handling all units that are sensitive to static electricity. This bracelet consists of an expandable wrist strap and grounding cord; its function is to dissipate charges to ground.
• At all times, handle the units by the faceplate or stiffener.
• Do not touch the solder side, pin connector, or components.
• Do not stack units on top of, or against each other.
• Do not force units into the packaging material.
• Ensure that the transmit and receive optical connectors of optical units are protected by dust caps at all times.
Note: Alternative personnel grounding methods can be used; for example, conductive carpet, conductive shoes, or heel grounding assemblies.
Storing units Spare units must be left in the original shipping container until required.
To prevent damage to DV-45 units while they are in storage, necessary precautions must be observed, to avoid:
• accumulation of dirt or dust on the gold-plated contact
• defacing of printed wiring areas
• board warpage if stored in an area of high humidity and temperature.
Installing or replacing unitsTo prevent electrostatic damage, the following conditions apply during the installation or replacement of DV-45 units that are sensitive to static electricity:
• all units must be enclosed in static shielding bags for transportation
• upon reaching the trouble location, maintenance personnel must attach a antistatic bracelet before removing units
• suspect units must be removed and immediately placed in a static shielding bag
• all safety precautions listed under “Handling units” should be followed during installation and replacement of units.
Whenever possible use the original static shielding bag, padding, and box in which the DV-45 unit was received. If the original material is lost, use other suitable packing.
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
Observing safety guidelines 7-3
Optical fibersOptical fibers are either single or multiple strand. The following information and precautions apply to all fibers.
Laser radiationAll Nortel optical products and associated optical test sets use laser sources that emit light energy into fiber cables. This energy is within the red (visible) and infrared (invisible) regions of the electromagnetic spectrum.
Laser products are subject to federal regulations, state or provincial regulations, and local practices. Regulation 21CFR 1040 of the U.S. Bureau of Radiological Health requires manufacturers to certify each laser product as Class I, II, III, or IV depending on the characteristics of the laser radiation emitted. In terms of health and safety, Class I products present the least hazard (none at all), while class IV products present the greatest hazard.
During testing and maintenance, some procedures require the handling of optical fibers and transmitters with the dust caps removed. Under these circumstances, laser radiation within the limits of Class IIIb might be present.
This level of radiation is of sufficient magnitude to cause injury to personnel and caution must therefore be exercised to avoid exposure. This precaution applies to any point in the system where the laser signal can be accessed (for example, at the optical connectors on the front of DV-OC3 units).
Bending optical fibersThere is a risk of damaging optical fibers if they are bent too much. A minimum bending diameter of 76 mm (3 in.) is recommended. In addition, all optical connections to optical units should only be finger-tightened.
Handling optical fibersWhen working with optical fibers, you must observe the following precautions:
• Wear safety glasses when installing optical fibers.
• Avoid direct exposure to fiber ends or optical connector ends where the laser signal can be accessed.
All Nortel S/DMS transmission products comply with 21 CFR 1040, Chapter 1, subchapter J as a Class I laser product as set forth by the U.S. Bureau of Radiological Health. These regulations ensure that there are no personnel hazards from the laser
Avoid direct exposure to beam. Invisible light can blind. Keep all optical connectors capped.
transmitter when the system is in its operating configuration. A label similar to this is located on all optical interface packs, near the optical connector.
Caution
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
7-4 Observing safety guidelines
• Wipe clean or wash your hands after handling optical fibers. Small bits of glass are almost invisible and can damage your eyes.
• Do not handle pieces of optical fiber with your bare fingers. Use tweezers or the sticky side of a piece of vinyl tape to pick up and discard any loose fiber ends.
• Place all optical fiber cuttings in a plastic bottle provided for that purpose.
• Handle optical fibers with care. Position them in a safe and secure location during installation.
• Protect all optical fiber connectors with dust caps at all times.
• Follow the manufacturer’s instructions when using an optical test set. Incorrect calibration or control settings could result in hazardous levels of radiation.
Splicing optical fibersDuring the splicing of any fiber, you might be required to look at the fiber using an eye loupe (a small magnifier). Observe the following precautions:
• Before starting the splicing, power off all laser sources to the fiber or disconnect the remote fiber end from the laser sources.
• Ensure that the laser sources stay disconnected or powered off, whether the sources are located in a central office, subscriber premises, or a remote location.
• Before starting the splicing, disconnect any optical test sets from the fiber (whether locally or remotely connected).
• Use only the optical instruments approved by your company.
Repairing optical fibersWhen there is an accidental break in the fiber, you must do the following:
• Notify both equipment-office and field-repair personnel of the problem.
• Identify to the equipment-office personnel where the fibers have been damaged.
• Power off all laser sources to the fiber or disconnect remote fiber end from the laser sources, whether the sources are located in an equipment office, subscriber premises, or a remote location.
DANGERRisk of eye injuryIf there is any suspicion of a glass chip in your eye, seek medical attention at once.
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
Observing safety guidelines 7-5
Radio-frequency emissionsThe following regulatory notice applies to all Nortel SONET transmission products.
This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
This equipment generates, uses, and can radiate radio-frequency energy and, if not installed and used in accordance with the instruction manual, can cause harmful interference to radio communications. Operation of this equipment in a residential area can cause harmful interference, in which case users will be required to correct the interference at their own expense.
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
7-6 Observing safety guidelines
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
8-1
Installing and setting DV-OC3 unit options 8-
This chapter provides procedures for installing DV-OC3 units and setting unit options.
A DV-OC3 unit is part of the DV-45 system and is installed with other DV-45 equipment according to application requirements. This chapter only presents those procedures that are directly related to installing a DV-OC3 unit and setting the available options. For specific DS3 and OC3 connections to other equipment and the required option settings, refer to the application-specific documentation (for example, the System Documentation for the DVN application or Option Settings for S/DMS TransportNode equipment).
RequirementsThe procedures in this chapter assume that:
• all DV-45 shelves have been installed
• the dc-power to all DV-45 shelves has been connected
• all DV-45 equipment DS3, other than OC3, connections have been made
• all cables are installed according to recommended practices
Refer to the Installation NTP, 323-1401-201, within the DV-45 Reference Manual, PEC NT2H7902.
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
8-2 Installing and setting DV-OC3 unit options
Chapter task list
Task See...
Installing a heat deflector and routing fiber cables page 8-3
Setting DV-OC3 unit options page 8-7
Installing DV-OC3 units in a DV-45 shelf page 8-10
Upgrading DV-45 MCU firmware page 8-15
Connecting DS3 signals to a DV-OC3 unit page 8-17
Cleaning and assembling optical connectors page 8-19
Measuring optical output power page 8-24
Measuring optical receive power page 8-27
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
Installing and setting DV-OC3 unit options 8-3
Procedure 8-1Installing a heat deflector and routing fiber cables
Use this procedure to install a DV-45 heat deflector with fiber management and route the fiber cables to and from the heat deflector.
Requirements The following tools and materials are required:
• cable ties
• flexible-tubing conduit
• DV-45 heat deflector with fiber management (NT2H51AC)
• slotted screwdriver
• wire cutters (flush cutting)
Action
Step Action
1 Install a DV-45 heat deflector with fiber management on the bay, directly above each DV-45 shelf which contain DV-OC3 units, as shown in Figure 8-1. Secure the heat deflector with the screws provided.
2 Remove the front grill of the heat deflector by turning the screws on each side by a quarter-of-a-turn.
The fiber cable storage space, securing clips, and miniature variable optical attenuator (mVOA) mounting brackets will be exposed.
3 Fasten the flexible tubing to the left frame upright using the cable ties.
Note: Flexible tubing and fiber cables must be placed on the left side because all cables must enter the heat deflector from the left. All cables must also be easily accessible after the cables have been routed and secured.
4 Route the office fiber cables from the overhead cable rack through the flexible-tubing conduit and down the left side of the bay.
5 Route the fiber cables into the heat deflector through the access funnel on the left side of the heat deflector. See Figure 8-2 and Figure 8-3.
—continued—
CAUTIONRisk of damaging fiber cablesHandle fiber cables with care. Observe a minimum bending diameter of 76 mm (3 in.) at all times when bending fibers. Optical connections to the DV-OC3 units should be finger-tightened.
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
8-4 Installing and setting DV-OC3 unit options
Procedure 8-1 (continued)Installing a heat deflector and routing fiber cables
Figure 8-1Heat deflector with fiber management mounted on top of a DV-45 shelf
FW-0297.1
—continued—
482.6 mm(19 in.)
304.8 mm(12 in.)
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
Installing and setting DV-OC3 unit options 8-5
Procedure 8-1 (continued)Installing a heat deflector and routing fiber cables
Figure 8-2Fiber management
FW-3085
Figure 8-3Heat deflector with fiber management (viewed from the left)
FW-3077.1
—continued—
FW-3085
FW-3077.1
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
8-6 Installing and setting DV-OC3 unit options
Procedure 8-1 (continued)Installing a heat deflector and routing fiber cables
Step Action
6 If miniature variable-optical attenuators (mVOA) are used on the receive (IN) fibers, click them into one of the horseshoe-shaped holders provided.
Note 1: mVOAs are equipped with a screw adjustment mechanism. Attenuation is provided in relation to the number of turns (either clockwise or counterclockwise) of the screw. The screws are accessible through the grill vents. The attenuation of mVOAs is set to the minimum when shipped, and the position of the screw adjustment should not be changed until the optical cable integrity is verified.
Note 2: mVOAs may be required for use with long-reach DV-OC3 units. A mVOA is typically installed 1 m (3.3 ft) from the connector end of the receive (IN) fiber cable.
7 Route the transmit fiber to the appropriate DV-OC3 OUT terminal and the receive fiber to the corresponding IN terminal. Leave sufficient cable for assembling the cable optical connectors (see “Cleaning and assembling optical connectors” on page 8-19).
8 Coil the excess fiber cables and store them in the heat deflector storage space ensuring that coiled fiber cables have a minimum 76 mm (3 in.) diameter. Handle fiber cables with care. Secure the coiled fiber using the twist (horseshoe-shaped) cable clips provided.
Note: Any subsequent cabling should be done carefully to avoid damage to these fiber cables.
9 Reinstall the front grill.
—end—
CAUTIONRisk of damaging fiber cablesDo not hang fiber cables loose on the side of the bay frame. Always store excess fiber cables inside the heat deflector.
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
Installing and setting DV-OC3 unit options 8-7
Procedure 8-2Setting DV-OC3 unit options
Use this procedure to set up a DV-OC3 unit prior to installing it in a DV-45 shelf. This procedure details the available options; for specific settings, refer to the application-specific documentation (for example, the System Documentation for the DVN application).
Requirements Before proceeding with this procedure, see “Observing safety guidelines” on page 7-1 for important information on how to handle DV-45 units.
Tools Antistatic bracelet
Action
Step Action
1 Observe the antistatic precautions as described in “Observing safety guidelines” on page 7-1. Attach the antistatic bracelet and ground it.
2 Remove the DV-OC3 unit from the shipping carton and the static protection bag. Detach the DS3 in/out label from the back of the DV-OC3 unit.
3 Refer to Figure 8-4 and use it to locate S1 on the DV-OC3 unit.
4 Set the sub-switches on S1 as shown in Table 8-1.
Table 8-1DV-OC3 unit S1 settings
—continued—
Switch Description Settings Function1 OC3 STS #1 Tx Set to 1 for equipped
Set to 0 for unequippedUse for equipping STS#1 to transmit a DS3 payload
2 OC3 STS #1 Rx Set to 1 for equippedSet to 0 for unequipped
Use for equipping STS#1 to receive a DS3 payload
3 OC3 STS #2 Tx Set to 1 for equippedSet to 0 for unequipped
Use for equipping STS#2 to transmit a DS3 payload
4 OC3 STS #2 Rx Set to 1 for equippedSet to 0 for unequipped
Use for equipping STS#2 to receive a DS3 payload
5 OC3 STS #3 Tx Set to 1 for equippedSet to 0 for unequipped
Use for equipping STS#3 to transmit a DS3 payload
6 OC3 STS #3 Rx Set to 1 for equippedSet to 0 for unequipped
Use for equipping STS#3 to receive a DS3 payload
7 OC3 Rx Line Set to 1 for equipped Set to 0 for unequipped
Use for equipping the OC3 line to receive an OC3 payload
8 OC3 Rx Loop Timed / Freerun
Set to 1 for Loop Timed Set to 0 for Freerun
Use for setting the DV-OC3 unit timing source
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
8-8 Installing and setting DV-OC3 unit options
Procedure 8-2 (continued)Setting DV-OC3 unit options
Figure 8-4DV-OC3 unit showing location of switches S1 and S2, and EPROM U3
FW-3100
Note 1: By default, from the factory, all switches are set to the 1 position. The default settings equip all options and sets the unit to loop timing.
Note 2: Ignore markings on the actual switches (for example, “on” or “off”).
—continued—
ALARM STATUS
STS-DS3-1
UNITON
FAIL
S2 S1
OC3
STS-DS3-2
STS-DS3-3
In Out
CAUTIONAvoid direct exposureto beam. Invisible light can blind. Keep all optical connectors capped.
1234567812345678
TX
1R
X1
TX
2R
X2
TX
3R
X3
OC
3 Rx
LOO
P
A B
OC3
LB01
LB02
LB03
ST
S-1
ST
S-2
ST
S-3
OC
3 U3
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
Installing and setting DV-OC3 unit options 8-9
Procedure 8-2 (continued)Setting DV-OC3 unit options
Step Action
5 Refer to Figure 8-4 and use it to locate S2 on the DV-OC3 unit.
6 Identify the required cable range, see Table 8-2.
Table 8-2LBO ranges for the DS3 interfaces
7 Set the output line build out (LBO) circuitry for the DS3 interfaces using the sub-switches on S2 as shown in Table 8-3.
Table 8-3DV-OC3 unit switch S2 settings
8 See “Installing DV-OC3 units in a DV-45 shelf” on page 8-10, for instructions on inserting DV-OC3 units into a DV-45 shelf.
—end—
LBO switch setting Cable type and rangeRG-59 734A 735A
ON (=1) 0 - 50 m(0 - 164 ft)
0 - 70 m(0 - 230 ft)
0 - 70 m(0 - 230 ft)
OFF (=0) 50 - 76 m(164 - 250 ft)
70 - 137 m(230 - 450 ft)
70 - 137 m(230 - 450 ft)
Switch Description Settings Function1 OC3 DS3 #1 LBO1 Set to 1 for LBO ON
Set to 0 for LBO OFFUse to set the LBO for DS3#1
2 OC3 DS3 #2 LBO2 Set to 1 for LBO ONSet to 0 for LBO OFF
Use to set the LBO for DS3#2
3 OC3 DS3 #3 LBO3 Set to 1 for LBO ONSet to 0 for LBO OFF
Use to set the LBO for DS3#3
4 Not used Set to 1 5 STS-1 # 1
Unidirectional / BidirectionalSet to 1 for bidirectionalSet to 0 for unidirectional
Use to set the STS-1#1 signal direction
6 STS-1 # 2Unidirectional / Bidirectional
Set to 1 for bidirectionalSet to 0 for unidirectional
Use to set the STS-1#2 signal direction
7 STS-1 # 3Unidirectional / Bidirectional
Set to 1 for bidirectionalSet to 0 for unidirectional
Use to set the STS-1#3 signal direction
8 OC3 LineUnidirectional / Bidirectional
Set to 1 for bidirectionalSet to 0 for unidirectional
Use to set the OC3 line direction
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
8-10 Installing and setting DV-OC3 unit options
Procedure 8-3Installing DV-OC3 units in a DV-45 shelf
Use this procedure to install DV-OC3 units in a DV-45 shelf after the option switches have been set.
A DV-OC3 unit requires two DV-45 shelf slots and can only be installed correctly into adjacent slot positions 0 and 1, 2 and 3, 4 and 5, or 6 and 7.
All DV-OC3 units are keyed to prevent installation in incorrect shelf positions. If resistance is felt when inserting a DV-OC3 unit, do not force the DV-OC3 unit into slots, check that the unit is being inserted into an allowable slot pair. Ensure that all units are properly seated in the backplane connector.
If a DV-OC3 unit is installed into an incorrect shelf position (and the keys are broken), an OC3 Configuration Fail major alarm is generated by the MCU.
Requirements Before proceeding with this procedure, see “Observing safety guidelines” on page 7-1 of this document for important information on how to handle units.
Tools Antistatic braceletFlat-bladed screwdriver
Action
Step Action
1 Observe the antistatic precautions as described in “Observing safety guidelines” on page 7-1 of this document. Attach the antistatic bracelet and connect it to ground or use an antistatic mat.
2 If necessary, remove the locking bar from the DV-45 shelf as shown in Figure 8-6.
3 Use Figure 8-7, Figure 8-8, and Figure 8-9 as guides for determining the DV-OC3 unit position in the DV-45 shelf.
Note: A DV-OC3 unit can only be installed into adjacent DV-45 shelf slot pairs 0 and 1, 2 and 3, 4 and 5, or 6 and 7.
4 Align the DV- OC3 unit with the slot and insert it part way into the slot.
5 Open the latches on the unit as shown in Figure 8-6 by squeezing lightly.
6 Insert the DV-OC3 unit the remainder of the way into the slot. Use the latches to fully seat the unit in the backplane connector.
7 Replace the locking bar when the last DV-45 unit has been installed.
—continued—
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
Installing and setting DV-OC3 unit options 8-11
Procedure 8-3 (continued)Installing DV-OC3 units in a DV-45 shelf
Step Action
8 Using the supplied adhesive label, label the DS3 inputs and outputs as shown in Figure 8-5.
Note 1: Ensure that the label is placed on the slots that the DV-OC3 unit occupies.
Note 2: The adhesive label is supplied attached to the DV-OC3 unit.
Figure 8-5Rear DS3 interface BNC connections
FW-2377.2
—continued—
DS3-1 OUT
DS3-2 OUT
DS3-3 OUT
DS3-1 IN
DS3-2 IN
DS3-3 IN
OC3 Line Interface
VIDEOOUT/IN
VIDEOOUT/LOOP
DS3IN/OUT
DS3MONITORDECODER/CODER
CODEC 2
Slot 5
DS3 inputs DS3 outputs
Slot 4 Slot 3
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
8-12 Installing and setting DV-OC3 unit options
Procedure 8-3 (continued)Installing DV-OC3 units in a DV-45 shelf
Figure 8-6DV-45 shelf showing locking bar
FW-3103.1
—continued—
Locking Bar
01
2
67
89
10
CAUTION
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
Installing and setting DV-OC3 unit options 8-13
Procedure 8-3 (continued)Installing DV-OC3 units in a DV-45 shelf
Figure 8-7DV-45 shelf equipped with a DV-OC3 unit in slots 4 and 5 (typical codec configuration for a DVN quad-split remote site)
FW-3101
Figure 8-8DV-45 shelf equipped with a DV-OC3 unit in slots 6 and 7 (typical codec configuration for a DVN 3DS3 continuous presence remote site)
FW-3101.1
—continued—
Position #
DecoderCoder MCUDCS
CAUTION
0 1 2 3 4 5 6 7 8 9 10
OC3
Decoder
CAUTION
Decoder
Position #
DecoderCoder MCUDCS
0 1 2 3 4 5 6 7 8 9 10
OC3
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
8-14 Installing and setting DV-OC3 unit options
Procedure 8-3 (continued)Installing DV-OC3 units in a DV-45 shelf
Figure 8-9DV-45 shelf fully equipped with DV-OC3 units (typical equipment-office optical hub configuration)
FW-3102
—end—
Position #
MCU
CAUTION CAUTION CAUTIONCAUTION
0 1 2 3 4 5 6 7 8 9 10
OC3OC3OC3 OC3
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
Installing and setting DV-OC3 unit options 8-15
Procedure 8-4Upgrading DV-45 MCU firmware
Use this procedure to install a firmware upgrade in an existing DV-45 MCU (NT2H35EA and earlier) to upgrade it to handle DV-OC3 unit alarms and status data.
Note: New DV-45 MCUs, PEC NT2H35LA, already come equipped with the firmware to handle DV-OC3 unit alarms and status data.
Requirements Before proceeding with this procedure, see “Observing safety guidelines” on page 7-1 of this document for important information on how to handle units.
MaterialDV-45 MCU EPROM upgrade kit, PEC NT2H99LA
Tools Antistatic braceletAntistatic work surfaceFlat-bladed screwdriver
Action
Step Action
1 Observe the antistatic precautions as described in “Observing safety guidelines” on page 7-1 of this document. Attach the antistatic bracelet and connect it to ground or use an antistatic mat.
2 If necessary, remove the locking bar from the DV-45 shelf as shown in Figure 8-6 on page 8-12.
3 If necessary, remove the DV-45 MCU from the DV-45 shelf.
4 Place the DV-45 MCU onto the antistatic work surface and remove the U2 and U3 EPROMs. Refer to Figure 8-10 for the location of U2 and U3.
5 Install EPROM chip U2 (checksum 1EEE). Align the chip notch with the notch in the socket. Align the bottom pins of the EPROM with the bottom pins of the socket.
6 Repeat step 5 for EPROM chip U3 (checksum 5CC3).
7 Attach the adhesive label from the upgrade kit to the bottom latch of the MCU to identify it as an upgraded unit.
8 Check that the MCU options are set correctly (refer to your application documentation).
Note: The EPROM upgrade itself does not require any option changes.
—continued—
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
8-16 Installing and setting DV-OC3 unit options
Procedure 8-4 (continued)Upgrading DV-45 MCU firmware
Step Action
9 Align the MCU with DV-45 shelf slot 10 and insert it part way into the slot.
10 Open the latches on the unit as shown in Figure 8-6 on page 8-12 by squeezing lightly.
11 Insert the unit the remainder of the way into the slot. Use the latches to fully seat the unit in the backplane connector.
12 Replace the locking bar.
Figure 8-10DV-45 MCU EPROM locations
FW-1692.1
—end—
MCU
SHELFALARM
MAJORMINOR
ALARMCONTROL
ACO
LAMP TEST
ALARMSTATUS
BAT ABAT B
REM
ORDERWIRE
C/D 1
C/D 2
C/D 3
C/D 4
SELECT
JACK
UNITON
FAIL
AlarmCut-Off
Lamp Test/Learn
U2 U3
8 S
yn A
larm
Ena
ble
7 R
emot
e A
larm
Ena
ble
6 X
-bit
Ena
ble
5 S
ingl
e A
ddre
ss4
TL1
(po
rt0)
3 E
2A M
appi
ng 1
/TL1
(po
rt1)
2 E
2A A
ddre
ss M
SB
0/N
ot U
sed
1 E
2A A
ddre
ss L
SB
0/N
ot U
sed
Syn
c A
larm
Dis
able
Rem
ote
Ala
rm D
isab
leX
-bit
Dis
able
Dua
l Add
ress
E2A
(po
rt0)
E2A
Map
ping
2/D
VLN
(po
rt1)
E2A
Add
ress
MS
B 1
/Not
Use
dE
2A A
ddre
ss L
SB
1/N
ot U
sed
SW3 SW4
DVLN Address
8
7
6
5
4
3
2
1
B
A
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
Installing and setting DV-OC3 unit options 8-17
Procedure 8-5Connecting DS3 signals to a DV-OC3 unit
Use this procedure to connect DS3 input and output signals to a DV-OC3 unit.
RequirementsA single DV-OC3 unit can support up to three independent bidirectional DS3 channels. It is important to connect associated DS3 input and output signals to the correct DS3 channel. This procedure assumes that the DS3 cables have already been routed to the DV-45 shelf and identified in preparation for connection to the DV-OC3 unit.
Tools Wire strippersBNC crimping toolAntistatic bracelet
MaterialsRG-59B/U, 734A, or 735A coaxial cable BNC male connectorsBNC right-angle adapters
Action
Step Action
1 Identify the required DS3 cables at the rear of the DV-45 shelf.
2 Cut the cables to the appropriate length. Consider cable dressing requirements before cutting the cables.
3 Following standard procedure for BNC cable assembly, strip the DV-45 shelf ends of the cables and install male BNC connector on each cable.
4 Attach the antistatic bracelet and attach it to ground.
5 At the rear of the DV-45 shelf, identify the codec positions occupied by DV-OC3 units.
6 Using the supplied adhesive label (after detaching it from the DV-OC3 unit), label the DS3 inputs and outputs as shown in Figure 8-11.
Note 1: Ensure that the label is placed on the slots that the DV-OC3 unit occupies.
Note 2: The adhesive label is supplied attached to the DV-OC3 unit.
—continued—
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
8-18 Installing and setting DV-OC3 unit options
Procedure 8-5 (continued)Connecting DS3 signals to a DV-OC3 unit
Figure 8-11Rear DS3 interface BNC connections (showing a DV-OC3 unit in slots 4 and 5)
FW-2377.2
7 Connect a right-angle adapter to each labelled DS3 input and output.
8 Connect each DS3 BNC-terminated cable to the appropriate DS3 terminal.
9 Record the DV-45 slot and shelf numbers and the DS3 signal source/destination for configuration purposes.
—end—
DS3-1 OUT
DS3-2 OUT
DS3-3 OUT
DS3-1 IN
DS3-2 IN
DS3-3 IN
OC3 Line Interface
VIDEOOUT/IN
VIDEOOUT/LOOP
DS3IN/OUT
DS3MONITORDECODER/CODER
CODEC 2
Slot 5
DS3 inputs DS3 outputs
Slot 4 Slot 3
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
Installing and setting DV-OC3 unit options 8-19
Procedure 8-6Cleaning and assembling optical connectors
Input and output OC3 fiber optic connections are made using optical connectors at the front of the DV-OC3 unit. Connecting the optical signals involves cleaning and assembling FC, ST, or SC type connectors.
Note: When errors occur during testing or in-service operation, clean the DV-OC3 unit optical connectors.
RequirementsPrior to carrying out this procedure on an in-service system, you must:
• ensure that traffic has been removed from the optical interface, as this procedure necessitates disconnecting the fiber from the DV-OC3 unit.
Tools and materials
—continued—
Can of compressed air (CG Electronics “Airjet II” or equivalent using a designated CFC replacement)
Alcohol dispenser (Lenline SD-18 or equivalent)
Fiberscope with 200X magnification (Seikoh Gikens “Clearfocus”, Bausch & Laumbe eye loupe or equivalent)
Long-nose pliers
Antistatic bracelet
Nonabrasive, low-lint, disposable cloth or tissue (Texwipe Absorbond lint-free cloth or Kimwipes)
Lens paper (Fisher Scientific #11-995 or equivalent)
Lint-free pipe cleaners
Alcohol, reagent grade (99.9% pure), ethanol (denatured), or isopropyl alcohol
DANGERRisk of eye injury At all times when handling optical fibers, follow the safety procedures in “Observing safety guidelines” on page 7-1 of this document, and those recommended by your company.
Avoid direct exposure to laser beam or fiber. Invisible light that can blind is present. Keep all optical connectors capped.
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
8-20 Installing and setting DV-OC3 unit options
Procedure 8-6 (continued)Cleaning and assembling optical connectors
Action
Step Action
1 Observe all the precautions described in “Observing safety guidelines” on page 7-1. Put on an antistatic bracelet and attach it to ground.
Cleaning optical connectors mated to the DV-OC3 unit2 Loosen one of the fiber patchcords from the shelf fiber guide to provide
sufficient slack.
3 Disconnect the optical patchcord from the DV-OC3 unit.
4 Cover the exposed connector sleeve end with a clean dust cap. Do not use dust caps that have been in a dusty location, such as on the floor or in pockets.
Cleaning optical connectors on new patchcords or testcords5 Insert the connector that requires cleaning into the magnifier and assess the
cleanliness of the connector.
6 Remove the connector from the magnifier.
7 Holding the can of compressed air in an upright position, apply a short burst of air perpendicular to the ferrule of the connector, that is, across the end face.
8 Moisten a new, low-lint cloth with alcohol.
Note: Never reuse cleaning cloths. Use new material for each connector.
9 Applying moderate pressure, wipe the ferrule—by rotating the connector along the barrel—and the ferrule tip until the ferrule squeaks.
This removes any contaminants on the ferrule.
10 Immediately, apply a short burst of air perpendicular to the ferrule, to evaporate the alcohol.
11 Polish the ferrule tip by wiping it on a new, clean piece of lens tissue using one or two figure-eight patterns. This polishes off any residue remaining on the ferrule tip.
12 Finally, apply a short burst of air perpendicular to the ferrule tip. This removes any remaining airborne particles.
13 Reinsert the connector into a fiberscope and assess the cleanliness of the connector.
If the connector still looks dirty, remove the connector from the magnifier and repeat steps 8 through 13.
14 Remove the connector from the fiberscope, making sure that the connector end face and ferrule do not come into contact with any contaminants (dust, lint, or hands).
—continued—
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
Installing and setting DV-OC3 unit options 8-21
Procedure 8-6 (continued)Cleaning and assembling optical connectors
Step Action
15 Locate the desired subtask:
16 Assemble the optical patchcord (or test cord) to the DV-OC3 unit:
Assembling an FC connector17 Gently insert the ferrule into the sleeve. Ensure that the guide pin enters the
guide slot. See Figure 8-12.
18 Grasp the heat-shrink cable to keep the ferrule from rotating, while you gently screw the plug retainer onto the sleeve threads. Tighten the connection finger-tight.
19 Seat the tips of the fiber cables by gently pushing the heat shrink cable onto the plug.
20 Repeat steps 5 through 16 for the second connector. Then go to step 28.
Figure 8-12FC connector assembly
FW-3352
—continued—
If you are Then
Replacing a patchcord or performing a test
Remove the existing patchcord from the DV-OC3 unit. If you are performing a test, cover the end of the patch cord with a clean dust cap as soon as the patchcord has been disconnected.
Cleaning an existing patchcord connector
Remove the dust cap on the connector sleeve.
If you are connecting a Then go to
FC connector step 17
ST connector step 21
SC connector step 25
FW-10808
Guide slot
Sleeve thread
Guide pin Heat-shrink cable
Ferrule
Plug retainerSleeve
Ferrule tip(end face)
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
8-22 Installing and setting DV-OC3 unit options
Procedure 8-6 (continued)Cleaning and assembling optical connectors
Step Action
Assembling an ST connector21 Gently insert the ferrule into the sleeve so that the guide pin enters the guide
slot, as shown in Figure 8-13.
22 Rotate the plug retainer so that the retaining pin enters the retaining groove.
23 Push the connectors together and seat the tips of the fiber cables by gently pushing the heat-shrink cable.
24 Repeat steps 5 through 16 for the second connector. Then go to step 28.
Figure 8-13ST connector assembly
FW-3353
Assembling an SC connector25 Gently insert the ferrule into the sleeve so that the guide pin enters the guide
slot, as shown in Figure 8-14.
26 Grasp the plug retainer and gently push it into the connector to lock it in.
27 Repeat steps 5 through 16 for the second connector, then go to step 28.
—continued—
FW-10809
Retaining groove
Ferrule
Retaining pin
Sleeve Plug retainer
Guide slot Guide pin
Ferrule tip(end face)
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
Installing and setting DV-OC3 unit options 8-23
Procedure 8-6 (continued)Cleaning and assembling optical connectors
Figure 8-14SC connector assembly
FW-2968
Step Action
28 Insert each patchcord into the shelf fiber guide.
29 Check the optical output power. See “Measuring optical output power” on page 8-24.
30 Check the integrity of the optical cables.
31 If the optical output power or optical cable integrity are not satisfactory, remove the patchcord connectors from the DV-OC3 unit and cover the ends with clean dust caps (see procedure steps 1 to 4).
32 Replace the DV-OC3 unit.
33 Repeat this procedure from step 15. If problems persist after replacing the DV-OC3 unit, contact your next level of support.
—end—
FW-2968
Guide pin
Guide slot
Plug retainer
FerruleSleeve
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
8-24 Installing and setting DV-OC3 unit options
Procedure 8-7Measuring optical output power
Use this procedure to measure the output power from any optical interface. Keep a record of the results of these tests in your system administration system.
This test must be carried out each time a new optical interface is installed in a DV-45 shelf.
RequirementsPrior to carrying out this test, you must:
• ensure that the optical power meter is properly calibrated, as detailed in the owners manual
• ensure that the OC3 channel is out of service
• all connectors (on the optical interface and the test cord) have been properly cleaned (see “Cleaning and assembling optical connectors” on page 8-19)
Tools• Optical power meter (1310 nm) with a range of -50 to + 5 dBm
• Optical test cord, single-mode, 5 m (16 ft) long. Use:NT7E46BA for FC connectorsNT7E46CA for ST connectorsNT7E46DA for SC connectors
• Antistatic bracelet
.
—continued—
DANGERRisk of personal injuryAvoid direct exposure to laser beam or fiber. Invisible light that can blind is present. Keep all optical connectors capped.
CAUTIONRisk of equipment damageOptical connector performance can be adversely affected by dust. All connectors should be cleaned (see “Cleaning and assembling optical connectors” on page 8-19) prior to insertion in mating sleeves.
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
Installing and setting DV-OC3 unit options 8-25
Procedure 8-7 (continued)Measuring optical output power
Action
Step Action
1 Observe all the precautions described in “Observing safety guidelines” on page 7-1. Put on an antistatic bracelet and attach it to ground.
2 Select the DV-OC3 unit that you are going to test and remove the optical fibers if they are connected.
3 Set the optical power meter to measure the 1310 nm transmitter wavelength.
4 Connect one end of the optical test cord to the optical power meter and the other end to the Out optical connector on the DV-OC3 unit (see Figure 8-15).
Figure 8-15Optical power output measurement
FW-0237.1
—continued—
CAUTIONRisk of damaging circuit packsAvoid touching any components on the printed circuit board. Electrostatic-sensitive devices can be damaged by electrostatic discharge. Always ground yourself before handling a DV-OC3 unit.
ALARM STATUS
STS-DS3-1
UNITON
FAIL
OC3
STS-DS3-2
STS-DS3-3
In Out
CAUTION
Optical power meter(properly calibrated)
DV-45 shelf
DV-OC3 unit
Avoid direct exposureto beam. Invisible light can blind. Keep all optical connectors capped.
Optical test cord
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
8-26 Installing and setting DV-OC3 unit options
Procedure 8-7 (continued)Measuring optical output power
Step Action
5 Measure the optical output power and record the result.
The measured power must be greater than (that is, nearer to zero) or equal to, the following minimum value:
6 If the minimum optical power is not met, carry out the following steps in turn:
a. Disconnect and reconnect both connectors and repeat step 5.
b. Replace the optical test cord and repeat step 5.
c. Reseat the DV-OC3 unit and repeat step 5.
d. Clean all optical connectors as described in “Cleaning and assembling optical connectors” on page 8-19 and repeat step 5.
e. Replace the DV-OC3 unit and repeat step 5.
7 Record all measurements and report them to your system administrator.
8 Disconnect the optical test cord from the Out optical connector on the front of the DV-OC3 unit.
9 Repeat this procedure as required, to test all the DV-OC3 unit optical interfaces installed in the DV-45 shelf.
—end—
Module type Minimum Requirement
Long-reach DV-OC3 connectors −5 dBm
Intermediate-reach DV-OC3 connectors −15.0 dBm
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
Installing and setting DV-OC3 unit options 8-27
Procedure 8-8Measuring optical receive power
Use this procedure to measure the optical power received over the fiber link. The received optical power must be higher than the minimum and lower than the overload. Attenuation may need to be added if the power level is too high. Intermediate-reach units are designed to operate without additional attenuation.
Keep a record of the results of these tests in your system administration system.
This test must be carried out each time a new optical interface is installed in a DV-45 shelf.
RequirementsPrior to carrying out this test, you must:
• ensure that the optical power meter is properly calibrated, as detailed in the owners manual
• ensure that the OC3 channel is out of service
• all connectors (on the optical interface and the test cord) have been properly cleaned (see “Cleaning and assembling optical connectors” on page 8-19)
Tools• Optical power meter (1310 nm) with a range of -50 to + 5 dBm
• Optical test cord, single-mode, 5 m (16 ft) long. Use:NT7E46BA for FC connectorsNT7E46CA for ST connectorsNT7E46DA for SC connectors
• Antistatic bracelet
—continued—
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
8-28 Installing and setting DV-OC3 unit options
Procedure 8-8 (continued)Measuring optical receive power
.
Action
Step Action
1 Observe all the precautions described in “Observing safety guidelines” on page 7-1. Put on an antistatic bracelet and attach it to ground.
2 Select the DV-OC3 unit that you are going to test and remove the optical fibers if they are connected.
3 Set the optical power meter to measure the 1310 nm transmitter wavelength.
4 Disconnect the In optical connector from the DV-OC3 unit. Insert the connector into the optical power meter (see Figure 8-16).
—continued—
DANGERRisk of personal injuryAvoid direct exposure to laser beam or fiber. Invisible light that can blind is present. Keep all optical connectors capped.
CAUTIONRisk of equipment damageOptical connector performance can be adversely affected by dust. All connectors should be cleaned (see “Cleaning and assembling optical connectors” on page 8-19) prior to insertion in mating sleeves.
CAUTIONRisk of damaging circuit packsAvoid touching any components on the printed circuit board. Electrostatic-sensitive devices can be damaged by electrostatic discharge. Always ground yourself before handling a DV-OC3 unit.
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
Installing and setting DV-OC3 unit options 8-29
Procedure 8-8 (continued)Measuring optical receive power
Figure 8-16Optical power reception measurement
FW-4805
Step Action
5 Ensure that the received optical power is greater than the minimum and less than the overload (maximum) level.
Note: If the received power exceeds the maximum then attenuation must be added.
6 Adjust the mVOAs (if used) to an intermediate level. The recommended setting is −20 dBm.
Note: Intermediate-reach units are designed to operate without additional attenuation.
—end—
DV-OC3 unit Minimum Maximum
Intermediate-reach DV-OC3 connectors −28 dBm −8 dBm
Long-reach DV-OC3 connectors −24 dBm −10 dBm
ALARM STATUS
STS-DS3-1
UNITON
FAIL
OC3
STS-DS3-2
STS-DS3-3
In Out
CAUTIONAvoid direct exposureto beam. Invisible light can blind. Keep all optical connectors capped.
ALARM STATUS
STS-DS3-1
UNITON
FAIL
OC3
STS-DS3-2
STS-DS3-3
In Out
CAUTIONAvoid direct exposureto beam. Invisible light can blind. Keep all optical connectors capped.
G2
Opticalpowermeter
G1
Rx G2
Tx G2
Rx G1
Tx G1
Fibercross-connect
Fiber cable
= Miniature variable optical attenuator (mVOA)
RXfiber
TXfiber
DV-OC3 Unit Reference Manual 323-1401-380 FWP02 3.01 Standard
8-30 Installing and setting DV-OC3 unit options
Digital Video Codec DV-45 323-1401-380 FWP02 3.01 Standard
FiberWorld Transmission Product
Digital Video CodecDV-45DV-OC3 Unit Reference Manual
1995 Northern TelecomAll rights reservedInformation subject to change without notice
NTP number: 323-1401-380PEC: NT2H7908
FW02 3.01 StandardSeptember 1995Printed in Canada