Axell Wireless - Omu Ii_um 00018um

8/16/2019 Axell Wireless - Omu Ii_um 00018um

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AXELL OPTICAL MASTER UNIT MARK II

PRODUCT DESCRIPTION AND USER’S MANUAL

© Axell Wireless Ltd Doc PN 00018UM Rev. 1.9 I

Optical Master Unit Mark II

Product Description and User’s Manual

Doc PN 00018UM Rev. 1.9

THIS DOCUMENT IS VALID FOR ALL OMU MARK II MODELS


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II Doc PN 00018UM Rev. 1.9 © Axell Wireless Ltd

Copyright © 2013 Axell Wireless LtdAll rights reserved.

No part of this document may be copied, distributed, transmitted, transcribed, stored in a retrieval system, ortranslated into any human or computer language without the prior written permission of Axell Wireless Ltd.

The manufacturer has made every effort to ensure that the instructions contained in this document areadequate and free of errors and omissions. The manufacturer will, if necessary, explain issues which may notbe covered by this document. The manufacturer's liability for any errors in the document is limited to thecorrection of errors and the aforementioned advisory services.

This document has been prepared to be used by professional and properly trained personnel, and thecustomer assumes full responsibility when using them. The manufacturer welcomes customer comments aspart of the process of continual development and improvement of the documentation in the best way possiblefrom the user's viewpoint. Please submit your comments to the nearest Axell Wireless sales representative.

Contact Information

Headquarters Axell WirelessAerial HouseAsheridge RoadCheshamBuckinghamshire HP5 2QDUnited Kingdom

Tel: +44 1494 777000Fax: +44 1494 777002

Commercial inquiries [email protected] Web site www.axellwireless.com

Support issues [email protected] Technical Support Line, English speaking +44 1494 777 747

Contact information for Axell Wireless offices in other countries can be found on our web site,www.axellwireless.com

mailto:[email protected]:[email protected]://www.axellwireless.com/http://www.axellwireless.com/mailto:[email protected]:[email protected]://www.axellwireless.com/http://www.axellwireless.com/http://www.axellwireless.com/mailto:[email protected]://www.axellwireless.com/mailto:[email protected]


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© Axell Wireless Ltd Doc PN 00018UM Rev. 1.9 III

About This Manual

This Product Manual provides the following information:• Description of the OMU Unit• Procedures for setup, configuration and checking the proper operation of the unit• Maintenance and troubleshooting procedures

For whom it is IntendedThis Product Manual is intended for experienced technicians and engineers. It is assumed that thecustomers installing, operating, and maintaining Axell Wireless Remotes are familiar with the basicfunctionality of Remotes.

Notice

Confidential - Authorized Customer UseThis document may be used in its complete form only and is solely for the use of Axell Wirelessemployees and authorized Axell Wireless channels or customers. The material herein is proprietary toAxell Wireless. Any unauthorized reproduction, use or disclosure of any part thereof is strictly

prohibited.All trademarks and registered trademarks are the property of their respective owners.

Disclaimer of LiabilityContents herein are current as of the date of publication. Axell Wireless reserves the right to changethe contents without prior notice. The information furnished by Axell Wireless in this document is

believed to be accurate and reliable. However, Axell Wireless assumes no responsibility for its use.

In no event shall Axell Wireless be liable for any damage resulting from loss of data, loss of use, orloss of profits and Axell Wireless further disclaims any and all liability for indirect, incidental,special, consequential or other similes damages. This disclaimer of liability applies to all products,

publications and services during and after the warranty period.

Safety Instructions and Warnings

Throughout this manual, important safety warnings and admonishments are included to warn of possible hazards to persons or equipment. A safety warning identifies a possible hazard and thendescribes what may happen if the hazard is not avoided. The safety warnings – in the form ofDangers, Warnings and Cautions must be followed at all times. These warnings are flagged by the

use of a warning icon, usually the triangular alert icon seen below. The exclamation point within thetriangular alert icon is intended to warn the operator or service personnel of operation andmaintenance from factors relating to the product and its operating environment, which could pose asafety hazard.

Exclusive RemediesThe remedies provided herein are the Buyer’s sole and exclusive remedies. Axell Wireless shall not

be viable for any direct, incidental, or consequential damages, whether based on contract, tort, or anylegal theory.


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IV Doc PN 00018UM Rev. 1.9 © Axell Wireless Ltd

References

References to standards apply as relevant to the remote type being connected to the OMU II. Pleasesee respective remote manual for details.

GuaranteesAll antennas must be installed with lightning protection. Damage to power modules, as a result oflightning are not covered by the warranty.

General Safety Warnings Concerning Use of This SystemAlways observe standard safety precautions during installation, operation and maintenance of this

product.

Caution labels!

Throughout this manual, there are "Caution" warnings. "Caution" callsattention to a procedure or practice, which, if ignored, may result ininjury or damage to the system, system component or even the user. Donot perform any procedure preceded by a "Caution" until the describedconditions are fully understood and met.

Danger: Electrical Shock

To prevent electrical shock when installing or modifying the system power wiring, disconnect the wiring at the power source before workingwith un insulated wires or terminals.

Caution: RF Exposure

RF radiation, (especially at UHF frequencies) arising from transmitteroutputs connected to AWL’s equipment, must be considered a safetyhazard.

This condition might only occur in the event of cable disconnection, or because a ‘spare’ output has been left un- terminated. Either of theseconditions would impair the system’s efficiency. No investigationshould be carried out until all RF power sources have been removed.This would always be a wise precaution, despite the severe mismatch

between the impedance of an N type connector at 50 Ω, and that of freespace at 377Ω, which would severely compromise the efficientradiation of RF power. Radio frequency burns could also be a hazard, ifany RF power carrying components were to be carelessly touched!

Antenna positions should be chosen to comply with requirements (bothlocal & statutory) regarding exposure of personnel to RF radiation.When connected to an antenna, the unit is capable of producing RFfield strengths, which may exceed guideline safe values especially ifused with antennas having appreciable gain. In this regard the use ofdirectional antennas with backscreens and a strict site rule that

personnel must remain behind the screen while the RF power is on, isstrongly recommended.

Where the equipment is used near power lines or in association withtemporary masts not having lightning protection, the use of a safetyearth connected to the case-earthing bolt is strongly advised.


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© Axell Wireless Ltd Doc PN 00018UM Rev. 1.9 V

Caution: Safety to personnel.

• Before installing or replacing any of the equipment, the entiremanual should be read and understood.

• The user needs to supply the appropriate AC or DC power to theequipment. Incorrect power settings can cause damage to the

equipment and cause injury to the user.• Please be aware that the equipment may, during certain conditions

become very warm and can cause minor injuries if handled withoutany protection, such as gloves

• All servicing must be carried out by certified servicing engineers.

Caution: Safety toequipment

• When installing, replacing or using this product, observe all safety precautions during handling and operation. Failure to comply withthe following general safety precautions and with specific

precautions described elsewhere in this manual violates the safetystandards of the design, manufacture, and intended use of this

product.• Axell Wireless assumes no liability for the customer's failure to

comply with these precautions. This entire manual should be readand understood before operating or maintaining the remote.

• All servicing must be carried out by certified servicing engineers.

Attention: ElectrostaticSensitivity

Observe electrostatic precautionary procedures. ESD = Electrostatic Discharge Sensitive Device .Semiconductor transmitters and receivers provide highly reliable

performance when operated in conformity with their intended design.However, a semiconductor may be damaged by an electrostaticdischarge inadvertently imposed by careless handling.

Static electricity can be conducted to the semiconductor chip from thecentre pin of the RF input connector, and through the AC connector

pins. When unpacking and otherwise handling the remote, follow ESD precautionary procedures including use of grounded wrist straps,grounded workbench surfaces, and grounded floor mats.

Caution: Class 1 Laser

Equipment described in this manual are equipped with class 1 lasers, as per definition in EN 60825-1Caution - Un-terminated optical receptacles may emit laser radiation.Exercise caution as follows:• Do not stare into beam or view with optical instruments. Optical

transmitters in the fibre optic converter can send out high energy

invisible laser radiation. There is a risk for permanent damage tothe eye.• Always use protective cover on all cables and connectors which are

not connected.• Never look directly into a fibre cable or a connector.• Consider that a fibre can carry transmission in both directions.• During handling of laser cables or connections, ensure that the

source is switched off.• Regard all open connectors with respect and direct them in a safe

direction and never towards a reflecting surface. Reflected laser

radiation should be regarded as equally hazardous as directradiation.


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VI Doc PN 00018UM Rev. 1.9 © Axell Wireless Ltd

Table of Contents

1 Introduc tion ................................................................................................................. 1 1.1 Featu res ................................................................................................................................ 2

1.2 Ar ch itectur e .......................................................................................................................... 3 1.3 OMU II Models and Order ing Informat ion .......................................................................... 4 1.4 Point-of-Interface (POI) ........................................................................................................ 5 1.5 Suppo rted Combinatio ns of High-powered and Low -powered Units ............................. 5

1.5.1 OMU II Topology with 24 MBF-20 Remotes ............................................................. 6 1.5.2 OMU II Topology with Eight High-Power Remotes ................................................... 6

1.6 OMU II Front Panel Modules ............................................................................................... 7 1.6.1 WDM Fibre Optic Converter ...................................................................................... 7 1.6.2 Optic Splitter .............................................................................................................. 8 1.6.3 RF Splitter and RF Combiner Modules ..................................................................... 8 1.6.4 Control Module .......................................................................................................... 9 1.6.5 External Alarm and Battery Module ........................................................................... 9 1.6.6 Modem Unit ............................................................................................................... 9 1.6.7 Modem Antenna ...................................................................................................... 10 1.6.8 Rack Communication Board .................................................................................... 10

1.7 OMU Rear Panel Power and RF Interfaces ...................................................................... 11 1.7.1 Rear Panel for One or Two Service Connections ................................................... 11

2 Install ation ................................................................................................................. 12 2.1 Installation Overview ......................................................................................................... 12 2.2 Unpacking ........................................................................................................................... 12 2.3 Mounting in Rack ............................................................................................................... 12 2.4 Grounding – GND LUG ...................................................................................................... 13

2.5 RF Conn ecti ons – Sing le Sector ....................................................................................... 14 2.6 Fibre Optic Connections ................................................................................................... 14 2.7 External Alarm and Relay Conn ecti ons ........................................................................... 16 2.8 Mod em Con necti ons .......................................................................................................... 16

2.8.1 GPRS Modem SIM Card Installation ....................................................................... 17 2.8.2 Wireless Modem Antenna Connections .................................................................. 17 2.8.3 PSTN Modem .......................................................................................................... 17

2.9 Pow er Con nec ti ons ............................................................................................................ 18 2.9.1 Power Cable Connections for Single/Dual Sector Rear Panel ............................... 18 2.9.2 Power Up ................................................................................................................. 19

2.10 RF Spli tt er/Combiner Inst allat ion ..................................................................................... 19

3 OMU Commissioning Procedure ............................................................................. 20 3.1 Initiate Local Web Session ................................................................................................ 20

3.1.1 Supported Browsers ................................................................................................ 20 3.1.2 Opening a Local Web Session to the OMU II ......................................................... 20 3.1.3 Opening a Local USB Session to the OMU II ......................................................... 23 3.1.4 Login to the OMU II ................................................................................................. 24

3.2 Navigating the Web Interface ............................................................................................ 25 3.2.1 Management Options Buttons ................................................................................. 25 3.2.2 Home Pane View ..................................................................................................... 26 3.2.3 Configuration Options .............................................................................................. 27

3.3 Comm iss ioning Steps Overview ...................................................................................... 28 3.4 Conf iguring General Parameters ...................................................................................... 29

3.4.1 Site Information - OMU II Identification ................................................................... 29


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© Axell Wireless Ltd Doc PN 00018UM Rev. 1.9 VII

3.4.2 Date & Time ............................................................................................................. 30 3.4.3 Configure External Alarms ...................................................................................... 30 3.4.4 IP Address ............................................................................................................... 31

3.5 Remote Comm unicatio n Setup ......................................................................................... 32 3.5.1 TCP/IP and Ethernet ............................................................................................... 32

3.5.2 Modem Setup .......................................................................................................... 33 3.6 For Installations WITHOUT POI – RF Signal Level Limitation ....................................... 35

3.6.1 Calculating the Downlink Path Attenuation ............................................................. 35 3.6.2 Setting the Attenuation ............................................................................................ 36 3.6.3 Noise Considerations .............................................................................................. 37

3.7 Optical Loss Adjustment (OLA) Per L ink ........................................................................ 37 3.8 RF Balancing ...................................................................................................................... 39

3.8.1 Manual RF Balancing .............................................................................................. 39 3.8.2 Automatic Remote RF Balancing ............................................................................ 42

4 Setup and Commissioning of Remote Fibre-Fed Units ..........................................43 4.1 Over view ............................................................................................................................. 43 4.2 Connect to Remote ............................................................................................................ 43

5 Administ rat ion ......... ......... ......... ......... ......... ......... ......... ......... .......... ......... ......... .......45 5.1 User Accoun ts .................................................................................................................... 45

5.1.1 Default User Accounts ............................................................................................. 45 5.1.2 User Access Levels ................................................................................................. 45 5.1.3 Change Password ................................................................................................... 46

5.2 Reboot ................................................................................................................................. 46 5.3 Axell Shel l (Command Li ne In ter fac e) ............................................................................. 47 5.4 At tr ib ute Refer ence ............................................................................................................ 48 5.5 System Monitoring ............................................................................................................. 49

5.5.1 Module Status Monitoring ........................................................................................ 49 5.5.2 Logs ......................................................................................................................... 51 5.5.3 SNMP Support......................................................................................................... 52

6 Troubleshoot ing ........................................................................................................54 6.1 Troublesh ooting Remot e Com municati on ...................................................................... 54 6.2 Mod ule LEDs ....................................................................................................................... 60

6.2.1 WDM Module LEDs ................................................................................................. 60 6.2.2 Control Module LEDs .............................................................................................. 61 6.2.3 GSM Modem Behaviour .......................................................................................... 62

7 OMU II Configurations ...............................................................................................63

7.1 OMU II and MBF-20 Remotes ............................................................................................ 64 7.1.1 Single Sector 24 MBF-20 Remotes with POI .......................................................... 64 7.1.2 Single Sector 24 MBF-20 Remotes with Internal Splitter / Combiner ..................... 66 7.1.3 Dual Sector 24 MBF-20 Remotes with Internal Splitter / Combiners ...................... 68

7.2 OMU I Replacement ........................................................................................................... 70 7.2.1 OMU I Replacement – Single Sector, Six High Power Remotes ............................ 70 7.2.2 OMU II – schematic for OMU I replacement to support 1 Sector x 6 FO ................ 71

7.3 Sing le Secto r – Eigh t High Power Remotes .................................................................... 72 7.3.1 Physical Configuration ............................................................................................. 72 7.3.2 Schematic ................................................................................................................ 73

7.4 Two-Sectors – Eigh t High Power Remotes Split Evenly per Sector ............................. 74 7.4.1 Physical Configuration ............................................................................................. 74 7.4.2 Schematic ................................................................................................................ 75

7.5 Two-Sectors – Eigh t High Power Remotes Spl it Unevenly B etween Sectors ............. 76


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7.5.1 Physical Configuration ............................................................................................. 76 7.5.2 Schematic ................................................................................................................ 77

7.6 OMU II USA Solu tions – wi th External POI ...................................................................... 78 7.6.1 POI Single Sector –8 MBF-40 Remotes.................................................................. 78 7.6.2 OMU II USA POI Solutions ...................................................................................... 80

7.6.3 External POI for OMU II with 8 MBF-40 Remotes in a single sector ...................... 81 8 Maintenance .............................................................................................................. 82

8.1 General ................................................................................................................................ 82 8.2 Preventive Maintenance .................................................................................................... 82 8.3 Pro duct Di sposal ................................................................................................................ 82

Appendix A - Specifi cat ions .......... ......... ......... ......... ......... ......... ......... ......... ......... ......... . 83

Appendix B – Connections with Duplex Fi lt er ................ ......... ......... .......... ......... ......... . 84

Appendix C - F/O Cleaning Procedure ........... ......... ......... ......... ......... ......... .......... ......... 85

Cleaning Procedure ......................................................................................................... 86 Dry Clean ing ............................................................................................................................... 86 Wet Clean ing .............................................................................................................................. 88


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© Axell Wireless Ltd Doc PN 00018UM Rev. 1.9 1

1 IntroductionAxell OMU II is a scalable, flexible and remotely manageable fibre-to-optic conversion systemdesigned to provide media conversion and single source management capabilities for Axell high-

power and low-power fibre-fed Remote units. OMU II is a head-end system that acquires the RFsignal(s) from an external source, such as base station(s) or an off-air device, and converts the RFsignal into light signals for routing via optical fibres to remote Axell devices.

Depending on the model and the physical configuration, OMU II can support up to eight sectors(where support for more than two sectors requires the use of Axell’s Point Of Interface (POI) unit inconjunction with the OMU II).

OMU II can provide single source remote Web access commissioning and monitoring via a range ofremote modems or an Ethernet connection, where the hosted remote units are be monitored andmanaged via an OMU II session.


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2 Doc PN 00018UM Rev. 1.9 © Axell Wireless Ltd

1.1 Features• Wideband frequency range support - supports Cellular 2G, 3G, 4G services up to 2700MHz and

public safety services FM/VHF/UHF/LMR in one enclosure

• Supported Remote units – MBF-20 (low power), MBF-40 and BSF-3604 (high power)• Modular, scalable, highly customizable system• Flexible configuration to support up to 8 sectors via single chassis as well as MIMO and SISO

installations• Single enclosure to support high power (MBF-40/BSF-3604) and low power (MBF-20) remote

units:o Up to 24 MBF-20 remote units connected to a single OMU II unito Up to 8 high-power remote units (MBF-40 or BSF) connected to a single OMU II

unito Various combinations of both high-power and low-power remote units as detailed in

section 1.5• WDM technology (Wavelength Division Multiplexing) – single fibre connection to each Remote

unit • Automatic Optical Loss Adjustment – system initiated pilot tones sent between the OMU II and

each of its remote units are used to automatically determine the fibre loss and perform thenecessary adjustment for each link

• One or two (for redundancy) power-supplies (115-240V AC operation or DC 48V)• Management and control options:

o Hosted fibre-optic remote units are managed and controlled via the OMU II (throughfibre communication)

o Auto detect of connected Remote unitso Local setup via Ethernet (or via USB port)o Ethernet or wireless modem connection (optional) for remote management

o A range of supported modems including: GSM, WCDMA, CDMA 1x, PSTNo SNMP v1/v2c support


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1.2 ArchitectureOMU II comprises of a chassis in which various modules are installed and whose rear panel varies(model dependent) to support one RF sector, two RF sectors or up to eight RF sectors ( the latter requires the use of a POI unit ).

OMU II main function is to perform the RF to optic conversion from the RF source and route theoptic signal over the optical fibres towards fibre-fed Axell remotes. Two main types of remotes aresupported: high-power and low-power. Each optic conversion module provides power to a singlehigh-power remote, where up to 8 optic conversion modules are supported.

To support low-powered fibre-fed remotes, an optic splitter module is used to split the optical signalfrom one converter into four, feeding four low-powered fibre-fed remote units. Thus, variouscombinations of supported remote units can be achieved, within the given limitations. The validcombination of both high-power and low-power remotes per OMU II is detailed in section 1.5.

Below is a general example of an OMU II configuration fed by a single sector (BTS) and acombination of high power (e.g. MBF-40, BSF-3604) and low power (MBF-20) remote fibre-fedunits.

Figure 1-1. Overview of OMU II Architecture


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The following figure illustrates one high-powered and four low-power remote connections to theopto-board and optic splitter board.

Figure 1-2. Optic Converter Connections

1.3 OMU II Models and Ordering InformationOMU II is available in a range of models corresponding to remote products and customer needs.


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1.4 Point-of-Interface (POI)The POI unit is used with specific OMU II models whose rear panel is designed for interface with thePOI. This type of installation provides user customizable configurations of up to eight sectors thatcan be routed to user selectable optical conversion units.

The POI front panel provides the interfaces for up to eight RF sectors, whereas the rear panel allowsthe user to associate each sector to any of the OMU II optical conversion modules.

1.5 Supported Combinations of High-powered andLow-powered Units

The following table demonstrates the available remote combination in a single OMU system. Notethat the extreme options are for only high-power remotes - up to eight are supported; only low-powerremotes - up to 24 are supported. In addition, the available combinations of both types of units.

# of MBF-40 / BSF-3604 # of MBF-20

8 0

7 4

6 8

5 12

4 16

3 16

2 20

1 20

0 24

Figure 1-3. Remote Combination Table


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1.5.1 OMU II Topology with 24 MBF-20 RemotesIllustrated below is an example of a configuration supporting up to 24 MBF-20 units.

Figure 1-4. Example of an OMU with the maximum supported number of MBF-20 Remotes

1.5.2 OMU II Topology with Eight High-Power RemotesThe following figure illustrates an installation with several sectors (up to eight) – each with adedicated connection via the POI unit to the OMU II . The POI adjusts the power level of eachservices to 10dBm and routes it to one or more (according to manual configuration on the unit) opticconverter units.

Figure 1-5. Example of an OMU and POI for multi-sector support


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1.6 OMU II Front Panel ModulesOMU II chassis is designed for a 19” rack. It houses a number of different modules where the typesof modules must be inserted in specific slots. For reference, the slots in the image below arenumbered from left to right. Each of the modules is described in detail in the following sections.

The OMU II has 12 connector slots configured, where specific types of modules must be inserted inthe relevant slots.

Figure 1-6. Axell OMU Front Panel Interfaces

1.6.1 WDM Fibre Optic Converter

Caution: Class 1 Laser

Caution!!! Un-terminated optical receptacles may emit laser radiation.Do not stare into beam or view with optical instruments.

Location: see Figure 1-6.

Provides WDM (single fibre) RF to optical signal conversion.• Interfaces via the fibre (SC/APC port) to one of the following:

o One high-power fibre-fed remote oro To an Optic Splitter module for feeding four low power

fibre-fed remotes.• Six LED indicators: power status, error, (2) data communication

and (2) optic signals. See section 6.2.1 for more details.

ERR

PWR

ULDATA

DLDATA

OPTORx

OPTOTx

SC/APC

Optic port


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1.6.2 Optic Split ter


Splits an optic signal from the connected WDM fibre-optic converter to fourF/O signals used to feed four MBF-20 units

1.6.3 RF Splitter and RF Combiner Modules


Each pair of modules supports interface to one RF service. Depending onwhether the ports are shorted, the service(s) can be connected from the front(or rear of the chassis).• Combine and distribute the RF signals between the OMU’s RF port and

up to six Fibre Optic modules.• Allows for Front Panel connection to RF source (e.g BTS).• Contains attenuators used to set the master signal levels in the downlink

and uplink.

Note: By default, the module ports are interconnected (UL In to RF out) toallow RF connections at the rear of the unit. However, these may bedisconnected to allow RF connections at the front of the unit for tests ortroubleshooting.

IN/OUT

RF in

DL out

RF out

UL in

To Fibre OpticConverter port

Towards fourMBF-20 remotes


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1.6.4 Control Module


Provides control and management connections. These include local Ethernet(and USB) management Web management and a modem.Manages and controls the OMU and transmits alarms to the control centre.• Includes a Real Time Clock (RTC) with a dedicated backup battery.• Status LEDS:

o Modem Statuso Modem Powero Statuso Login

1.6.5 External Alarm and Battery Module

Location: see Figure 1-6. • Supports connections for four dry-contact external alarms and an alarm

relay (output alarm).• ON/Off switch – can switch On/Off rechargeable battery pack. When

on, allows the modem to transmit an alarm in case input power loss isdetected. Switch for ON/OFF.

• LED - Power

1.6.6 Modem Unit

Location: see Figure 1-6. • Optional – if a modem is not available on the Control unit. For

example, PSTN modems or wireless modems with a form factor that prevents it from being integrated with the Control Module.

• The access to a PSTN modem is via an RJ11 connector on the front ofthe module.

M o d em S

t a t u s

M o d em P

ow

e

r

S t a t u s

L o gi n

.. .. .. .. .

.. .. .. .. .

L MT P

or t

Ethernet

PWR

BatteryPower

OnOff

PWR


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1.6.7 Modem Antenna

Location: see Figure 1-6. • Always relevant if a modem (except for PSTN modem) is

installed – either as an integrated part of the Controlmodule or as a dedicated module.

• Provides the connection to an external (modem) antenna

1.6.8 Rack Communication BoardLocation: see Figure 1-6. • Provides two functions:

o Allows communication between the Optic Converters andthe Control Module.

• LEDs indicate communication status between Control Module and F/Oconverters

Modem ANT

To externalantenna

ERR

PWR

ULDATA

DLDATA

Link OK

I N

O UT 1

O UT 2

ERR

PWR

ULDATA

DLDATA

Link OK

I N

O UT 1

O UT 2


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1.7 OMU Rear Panel Power and RF InterfacesThe OMU II rear-panel provides interface to the:• RF source connections•

Power supply connectionsTwo main types of rear panels are available:• Model supporting one or two service connections• Model supporting up to eight service connections via POI interface

1.7.1 Rear Panel for One or Two Service Connect ionsThe rear panel is protected by a removable plate with openings for routing the power cables and foraccessing the OMU N-type RF connections.

The rear panel may vary according to the number of supported sectors. The following figureillustrates the rear panel supplied for a single sector with simplex RF connections.

Figure 1-7. Example of OMU II Rear Panel Interfaces – Single Sector Simplex Connections

RoutedPower Cables

RFconnections

Removablerear panel


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2 Installation

2.1 Installation OverviewTo get the system up and running, the following steps are required:1. Unpack the equipment and verify all ordered items have been delivered and in operational

condition.

2. Mount the OMU in a 19” rack (see 2.3) .

3. Ground the unit ( 2.4) 4. Connect rear panel RF connections in the back panel (see 2.5)

5. Connect rear panel power cables (see 2.9.1)

6. Connect all F/O connections ( 2.6) 7. For GPRS modem communication, insert SIM card in Control module (see 2.8.1)

8. System setup and commissioning using the Web-GUI (see Chapter 0).

2.2 UnpackingInspect the shipped material before unpacking the equipment, document any visual damage andreport according to routines. A delivery of an OMU from Axell Wireless contains:• Checklist with delivered items• OMU II Chassis with modules according to order

2.3 Mounting in RackThe OMU is designed to be mounted in a 19” rack. Follow the standard procedure on mountingequipment in a 19” rack.

NOTE: A fibre guide unit can be mounted above the OMU to support the fibres as they are run fromthe front of the OMU to the back side of the rack..


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2.4 Grounding – GND LUGNote the following:• Ensure that good grounding protection measures are taken to create a reliable OMU site. Make

sure to use adequately dimensioned grounding cables.• The antenna cabling should be connected to ground every 10m by a reliable grounding kit.• Make sure the grounding product used is suitable for the kind and size of cable being used.• Connect the OMU ground bolt to the same ground.

To ground the OMU II

Remove the rear panel.Attach the GND lug to the screws securing the bracket via which the POWER cables arerouted (adjacent to the RF connectors).Route the GND cable along with the power cable through the bracket .

Re-assemble the rear panel, fitting the RF connectors and routing the power and GNDcables (green and yellow) through the openings.

Figure 2-1. OMU II GND Connection

GND wire routed viarear panel openings

GND connectioninside the rear panel


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2.5 RF Connections – Single SectorThe connector for the uplink and the downlink connector are N-type and placed on the OMU rearpanel . The OMU is connected to the BTS (or the remote) via a directional coupler (illustrated

below). The coupler is connected in series with the BTS antenna.

Figure 2-2. Example of Single Sector RF Connection Directly to the BTS

2.6 Fibre Optic ConnectionsThis product is equipped with Class 1 lasers, as per definition in EN 60825-1.

CAUTION:Class 1 Laser

Un-terminated optical receptacles may emit laser radiation.Do not stare into beam or view with optical instruments.

ATTEENTION!

• Angled connectors, APC, need to be used throughout the whole link between the OMU and the remotes. The angle needs to be 8 degrees.

• APC connectors are coloured Green. Non APC connectors are Blueand unsuitable for use. Do not mate APC and Non-APC connectors!

• All Optical connectors must be carefully cleaned prior to mating. Adirty connector, once inserted, will contaminate the Fibre Opticconnector inside the module which will then become unserviceable

until it too is cleaned. Fibre Optic modules cannot be dismantled forcleaning in the field. Cleaning of dirty fibre optic connectors is notcovered by Warranty.Fibre optic cleaning methods are detailed in Appendix C - F/OCleaning Procedure.

Note the following :• The fibre connectors on the Fibre Optic Converters are SC/APC type.• The fibre cables may be connected towards the remote units either directly or via an optical

distribution panel.

• Connect the optic fibres according to standard angle and cleaning requirements.

10dBm

Duplexer

BTS signalsource

DL

UL

DirectionalCoupler

Antenna

e.g. -40dB


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Connecting the F/O Cables

1. If connecting towards a high-powered remote (e.g. MBF-40, NBF 3604), connect it directly to anOpto-module.

2. If connecting towards a low-power remote (e.g. MBF-20):

o Connect the Optic Module port to the BOTTOM port on the Optic Splitter module.o Connect the low power remote towards the optic Splitter/Combiner.

Figure 2-3. F/O Connections

Interconnect for MBF-20connections to Optic Splitter

To one high-powerremote

To four MBF-20remotes


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2.7 External Alarm and Relay ConnectionsFour external alarm sources can be connected to the External Alarm and Battery Module via the

patch panels as follows:• Sources must generate a voltage between 12 and 24VDC (the presence or absence of this voltage

will trigger the alarm depending on how the alarm thresholds have been configured).• Can supply +15V to an external alarm sources with a maximum allowed load of 100mA.• Maximum current through the relay is 100mA - can be configured to trigger on any number of

internal and/or external alarms.

The panels can be used for wires of up to 0.5mm 2. To connect a wire, press the yellow lever with a pen or other pointed item, insert the wire and release the lever.

Figure 2-4. External Alarm and Battery Module with pin out for external alarms and relay

2.8 Modem ConnectionsNote the following :• The modem may be installed as an integrated part of the Control module or as an independent

module. Both configurations require modem antenna installation.• GPRS modems require the installation of a SIM card.• Two types of modems are available – Wireless (GPRS, CDMA etc.) or PSTN.

PWR

BatteryPower

GNDGNDExternal alarm 1AExternal alarm 1BExternal alarm 2AExternal alarm 2B

Relay Output 1ARelay Output 1B+15VDC OutputGNDGND

External alarm 3AExternal alarm 3BExternal alarm 4AExternal alarm 4B

123456

789

1011

12131415

123456789

101112131415

OnOff


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2.8.1 GPRS Modem SIM Card Installation

Insert the SIM card in the Control module SIM slot.

2.8.2 Wireless Modem Antenna Connections

The Modem ANT module supports an external antenna connection viaSMA connector.

Insert this module at the rightmost slot in the OMU.

2.8.3 PSTN ModemIf the OMU is equipped with a PSTN modem the connector is placed in the Modem Unit. Theconnector is RJ11. Connect the modem module to a landline outlet (using an RJ11 cable).

M o d em S

t a t u s

M o d em P

ow

e

r

S t a t u s

L o gi n

.. .. .. .. .

.. .. .. .. .

L MT P

or t

Ethernet

Modem ANT

To externalantenna


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2.9 Power Connections

2.9.1 Power Cable Connect ions for Single/Dual Sector Rear PanelThe OMU power supplies are placed in the rear, behind the back cover.

Connecting t he Power Cables

1. Remove the rear panel by unscrewing the six screws.

2. Connect the supplied power cable(s) to one or both power supplies according to your physicalconfiguration.

3. Replace the rear panel such that the power cable(s) (and GND cable) run through the openings onthe right (adjacent to the RF connections).

PowerCables

PowerSupplies

RFConnectors

Connect to power cables

Rear panel

GNDcables


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3 OMU Commissioning

ProcedureTo commission the OMU II, connect to the unit locally and perform a few basic configuration procedures according to the instructions in this section.

3.1 Initiate Local Web Session

NOTE: OMU II is supplied with default IP address 192.168.1.253 and netmask 255.255.255.0.

You can open a local Web session to the OMU II using one of the following methods:•

A local Ethernet connection to the OMU II using an Ethernet cross-cable – requires configuringyour computer to run in the same subnet as the default OMU II IP address.• A USB connection using the supplied USB cable – requires loading the USB driver from the

supplied Setup disk.

3.1.1 Support ed Browsers

Notes: Java Script must be enabled in order for the Web-GUI to work.

Browser Requirements:o Mozilla Firefox 3 or latero Google Chrome 11 or latero Apple Safari 5 or latero Opera 10 or latero Internet Explorer 9 or later (Explorer 8 is not compatible – the Web GUI may not be

accessed properly using Explorer 8)

3.1.2 Opening a Local Web Session to the OMU II

3.1.2.1 Connect the OMU II to computer

Interconnect the computer and the OMU II front panel Ethernet ports with the supplied cable asshown below.

Figure 5. Local Ethernet Connection

Ethernet cross-cable


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3.1.2.2 Configure the Comput er Network Parameters

Configure the computer network parameters to communicate with the OMU II. Note that the procedure may vary slightly depending on the operating system installed on your computer. Thefollowing procedure is for Windows 7.

To configure the computer’s network parameters:1. Click the Start menu and choose Control Panel .

2. In the Control Panel, click Network and Internet .

3. Click Network and Sharing Centre and then click Local Area Connection .

The Local Area Connections Status dialog appears with the General tab displayed by default.

Figure 6. Local PC Network Information

4. Click the Properties button. The Networking tab appears.

Figure 7. Local PC Network Information 2


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5. In the Items list, double-click the “Internet Protocol Version 4 (TCP*IPv4)” item .

6. The Internet Protocol Version 4 (TCP/IPv4) Properties dialog appears.

Note: The OMU II is factory set with the default IP address 192.168.1.253.

7. Assign your computer an IP address in the same subnet, in order to communicate with the unit.o In the IP address area:o Enter the IP address 192.168.1.x, where ‘x’ can be any number between 2 and 250

inclusive. For example, (192.168.1.9)o Define the subnet mask as shown (255.255.255.0)

Figure 8. PC IP Configuration

o Click OK . The computer communication parameters are now defined and you canopen a session to the OMII.

3.1.2.3 Opening a Session to the ML

1. Enter the OMU II default IP address in the Web browser.

2. The OMU II login dialog will appear.

3. Login according to section 3.1.4


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3.1.3 Opening a Local USB Session to the OMU II

NOTE: This procedure requires downloading the USB driver from the provided disk or preloading itto your computer from the network.

For first time connection to the OMU II USB port and any of your computer’s USBports:

1. Connect to OMU USB port on any of your computer’s USB ports. If this is a first timeconnection, your computer will require the appropriate driver to be installed.

2. If you are connected to the internet - a standard driver will be downloaded automatically.

3. If you are not connected to the internet:o Insert you setup disk in the drive.o Guide the system to the driver Axell Controller USB driver.inf driver on the disk.

4. Open the web browser and type "axell-ne" in the address bar.

5. Login according to section 3.1.4

USB


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3.1.4 Login to the OMU II1. After connecting to the OMU II (either via Web or USB), the Axell login dialog appears.

Figure 3-9. Login Screen

2. Use the following username and password to login:o Username: axell o Password: AxellPasswd

NOTE: It is highly recommended to change the default password according to section 5.1.3

The Web GUI Main Window appears.

3. Review the Web GUI Main window description and perform the required configuration procedures according to the following sections.


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3.2 Navigating the Web InterfaceThe Web GUI window provides access to the management options of the OMU and each of itsconnected remotes. Several tabs (and sub-tabs) are available: Home, Nodes, Logs, etc., where theHome tab (illustrated below), is displayed by default.

Figure 3-10. Basic View

3.2.1 Management Options ButtonsThe following table briefly describes the main functions of each tab:

Tab Description

Provides a general status and alarm information for OMU II system and itscorresponding Remote Nodes (Remotes). Switching to Advanced View will toggle amore detailed view of each Opto-module's status. Section 3.2.2.

Lists the remote nodes connected to a selected OMU. Provides access to theconfiguration options of each remote. Section 4.2.

List of recent operations. Section 5.5.2

Provides a range of OMU II configuration procedures such as communication, RF,Date and Time, Password, etc. Section 3.2.3

Logout of the system.

Managementoptions buttons

Remote Optical Loss andRF Adjust options

Home paneoptions


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3.2.2 Home Pane ViewThe Home tab is used for general monitoring of the OMUII status and can be displayed in severalviews:• Collapsed – minimized the panes in the home view• Basic – main status displays for a basic view• Advanced – provides more status information. Usually used for troubleshooting if faults are

displayed in basic view.

In addition, the OLA – Optical Loss Adjustment provides access to the optical loss adjustmentoperation for all connected Remote links

Figure 3-11. Basic View

The pane is divided into four basic areas:• Controller – shows general information on the OMU II device such as identification and

temperature level• External Alarms – shows status of external alarms and the defined names• Rack 1 to 4 – area displayed per rack (can be minimized). It includes two sub-area:

o Point of Interface – shows status of input signal and used to provide attenuationoptions. For more information on RF configuration, refer to section 3.6.

o Fibre Optics Modules – shows status on all Remote links and displays Remotes(according to index number) connected to the nodes. See section 4.2 for moreinformation.

NOTE: If one of the system nodes reports an alarm, the Rack to which it is attached to, automaticallyexpands to show the alarm status (blinking red LED) assisting troubleshooting.

Viewing optionsManagement options

buttons

General

Ext.Alarms

RemoteModules

Remote Optical Loss andRemote RF Adjust options


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3.2.3 Configuration OptionsThe configuration pane provides access to the OMU II configuration options.

To access the configuration pane

In the Main window, click on the Config menu option. The following pane appears.

Option Description

SiteInformation

Configure and display OMU II identification information. See section 3.4.1

ExternalAlarms

Used to activate and assign names to external alarms. See section 3.4.3

Change password

Used to update system login password for the logged-in user. See section 5.1.3

Date and Time Used to configure the time stamp for dating OMU II events. See section 3.4.2. Ethernet Used to define the IP Address for remote access via Ethernet.

RemoteCommunication

Used to configure remote communication (modem and Ethernet) and SNMP parameters. See section 3.5

Axell Shell Command line used to communicate with the remote units. List of commandsis found under Help. See section 5.3

AttributeReference

Lists and describes available Axell Shell commands, detailed and explained.Section 5.4

Rebootcontroller

Soft restarts the OMU II device. See section 5.2

SNMP Agent SNMP Agent configuration. See section 5.5.3


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3.3 Commissioning Steps OverviewThis section describes how to perform the basic setup procedures.

NOTE: Remotes running Common Firmware ver. 2.0.0 are automatically detected. Remotes runningCommon Firmware ver. 1.x are automatically added but cannot be commissioned through the OMU

II. Use the RMC or Terminal like view to commission these types of remotes (including Axell Shell).

Setup the OMU II as fol lows:

1. Configuring general parameters. This includes:o Assign a name TAG – section 3.4.1o Set Date & Time – section 3.4.2o If relevant, configure External Alarms and Relay – section 3.4.3

2. Setup remote connection parameters (Ethernet, modem, etc.). See section 3.5

3. Set UL/DL Attenuation. Section 3.6. 4. Verify all expected remote units are detected.

5. Perform OLA (Optical Loss Adjustment) for the connected fibre-fed remotes. See section 3.7.


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3.4 Configuring General Parameters

3.4.1 Site Information - OMU II Identi fication

It is recommended to assign each OMU II a recognizable name that will identify the location,site name, etc. The Site Information button provides access to OMU II hardware and softwareversion information.

To set OMU II TAG

1. In the Home window, click the edit button next to Tag.

Figure 3-12. Set OMU TAG Name

2. Enter the Name (up to 30 characters), click OK and click Apply.

To view OMU II Site Information

Click the Config button and click on the Site Information icon. Two areas are displayed:• Control Module – provides hardware and software version information.• Site Information – provides OMU II identification information.

Figure 3-13 . OMU Site Information

Lock nameEdit Tag


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3.4.2 Date & Time

Be sure to set the correct date and time in order to accurately timestamp all events occurringon the OMU II.

To set the Date & Time:

1. Click the Config button.

2. Click on Date & Time .

3. Do one of the following:o Either, enter the correct date and time according to the displayed formats.o Or, click on Local Time to set the time according to the PC running the Web-GUI.

4. Click Apply .

3.4.3 Configure External Alarms

It is required to configure any connected external alarms according to the trigger (high or low)and it is recommended to assign the alarms recognizable names (such as Door Open, HighTemperature, etc.)

To configure the external alarms

1. In the Main menu, click the Config button.

2. Click on External Alarms .

3. For each alarm:o Set the Trigger as High or Low as required.o Assign the alarm a recognizable description

4. Click Apply .

Set to local time

Set AlarmDescription

SetHigh/Low


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3.4.4 IP Address

This procedure describes how to set up the IP address either manually or configure foracquisition via DHCP.

To configure the IP address


2. Click on Ethernet .

3. For manual IP address configuration:o Select Manually Configure IP Address.o Set the IP, Subnet Mask, Default Gateway and DNS addresses.o Click Apply.

4. For DHCP IP address configuration:o Select Automatically Obtain IP Address (DHCP).o No other settings are required.o Click Apply.

The Manual configuration settings are illustrated below.


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3.5 Remote Communication Setup

This section describes the Ethernet and modem setup. The SNMP setup option alsoavailable in this dialog is described in section 5.5.3. SNMP .

Select an option (ETH TCP, Modem or SNMP) and configure. Then select the next relevant option.

NOTE: The configuration of each option is saved and active. It is not relevant which option iscurrently selected (ETH TCP, Modem or SNMP).

3.5.1 TCP/IP and EthernetTCP/IP communication is run over a company’s network. Therefore, each company needs to definethe details regarding the configuration, IP addresses, etc.

TCP/IP Communication Setup1. Click on the Config button.

2. From Device:Method select ETH:TCP (Ethernet:TCP/IP).

3. Click Apply .


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3.5.2 Modem Setup

NOTE: This section is relevant only if a modem is installed in the OMU II system. If connectingdirectly via Ethernet, see section 3.5.

The OMU II can operate over two types of modem: Packet Switched (GPRS, GSM etc.) or CircuitSwitched (PSTN/GSM). The available options depend on the modem type installed in your OMU IIsystem.

Modem Setup Overview

1. Insert the SIM card in the Control module SIM slot (if using a wireless modem).

2. Click the Config button and then choose Modem from the displayed icons. The following dialogappears.

3. Verify that Remote Communication is ON.

4. Select the Device:Method – communication method. Only the options relevant to your installed

modem will be displayed. (STD:DTC = Standard AT:Data Call, ETH:TCP = Ethernet:TCPconnection)

5. Configure your communication method according to the relevant following section.


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3.5.2.1 Packet Switched Modem Configuration (GSM/GPRS)

NOTE: In case network attach is not done properly (using GPRS), it is necessary to telnet, SSH orserial into the controller and enter TRACE MODEM to see why modem is not initialized (wrong /missing PIN, wrong APN etc).

• From the Remote communication menu, select TRM-3 GPRS .• In the GRPS area, enter the following:

o Access Point Name – customer’s Access Point name.o Click Apply .

3.5.2.2 Circuit Switched Modem (PSTN/GSM)Using a circuit switched modem requires a landline connection be present at the site (for PSTN) or aSIM card supporting this feature (for wireless).

Communication Setup

1. From Device:Method select STD:DTC (Stadnard AT:DataCall).

2. In the modem initialization string type: AT+CBST=7,0,1 .

3. Click Apply .


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Verify Circuit Switched Modem Functionality

1. Use the ACT RCD command via the Axell Shell or via Terminal to launch a modem restart (iflogged in, restart will be performed on the first logout).

2. Dial the modem number (if PSTN) or the data number (if SIM card).

3. Verify modem LEDs are lit correctly (see 6.2) .4. Use any ACT command using the RMC or other Terminal to test connectivity and

responsiveness.

3.5.2.3 SIM-card Using Single Numbering Scheme

If using SNS (Single Numbering Scheme), calls to the modem within the network are automaticallyclassified as DATA. However, if calling from outside the network, you must first verify how it’sinterfaces handle the VOICE vs. DATA bearing.

This cannot be solved at remote level. The external network administrator must provide the aboveinformation.

3.6 For Installations WITHOUT POI – RF SignalLevel Limitation

NOTE: This section is relevant ONLY for installations WITHOUT POI (i.e. with RFSplitter/Combiner modules). For installations with POI, verify the correct input voltage to the POI.

The OMU has a master attenuation that can be set in downlink (DL) and uplink (UL) separately. Thisattenuation is useful for balancing the whole system.

Note the following:• Usually, only the DL attenuation is calculated and set.• The UL attenuation is then set equal to the DL and only adjusted to compensate for any noise.

To estimate the signal levels in the system, a link budget should be prepared before the system ismade operational. This section provides background on calculating the required attenuation valuesalong the link and describes how to set the attenuation value in the management application.

3.6.1 Calculating the Downlink Path AttenuationThe following diagram illustrates the attenuation levels for a simplex RF connection.

Note the following:• Maximum input from BTS to OMU II = 23dBm (max)• Recommended composite power level to the Optical conversion modules ≤-3dBm (however, the

module can support up to 10dBm)• Without attenuation (attenuator set to ‘0’), the DL loss = -14dB• Any additional required attenuation (up to -21dB) is implemented via the Variable Attenuator,

where the goal is to acquire -3dBm at the Opto conversion unit (i.e. 11dBm after attenuation ) • Therefore, measured value shown in GUI should be 11dBm – but not more than 14dBm .


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3.6.3 Noise ConsiderationsTo reduce the noise degradation of the base station, it is recommended to reduce remote uplink gainonly. The remote cells will in this case not be perfectly balanced, i.e. downlink can take higher pathloss than uplink. In typical systems where you want to cover e.g. a road tunnel by tapping off a BTSnearby this small imbalance is less of a problem.

3.7 Optical Loss Adjustment (OLA) Per Link

NOTE: The OLA should be performed at each system setup. It is also recommended to run this procedure each time a change in the optical equipment is performed.

Each fibre optic link in the system will induce a loss. This loss will also differ in magnitude from onelink to another since the distances between each remote and the OMU is different. The OMU II andits hosted remote units automatically calculate this loss and compensate for it on each link.

This is accomplished through measurements of pilot tones of known levels sent between links andautomatic level adjustments to compensate for any calculated losses.

The adjustment is made towards a target value which means that the system will be balanced, i.e. allfibres will appear to have the same loss. The maximum compensation is 10dB which equals anunbroken fibre distance of 20 km. For each connection in the link (for instance at the ODF)approximately 0.5 dB of loss will have to be added.

NOTE: For MBF-40 remotes, the maximum compensation is increased to 26dB to support shorter fibre optic distances.

To initiate Optical Loss Adjustment

1. Click on the Home button and then the Opto Adjust button.

The following pane appears:

Figure 3-14. Configure and Initiate Optical Loss Adjustment

Rack#:Opto-Module

Select nodesfor UL/DL

Adjustment

F-DASRemotes via

Optic Splitter


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Column Description

Pos Each Rack corresponds to an OMU unit whereas each Slotcorresponds to an Opto-Module. Slots are numbered according to their

position in the OMU Chassis (numbered left to right ).

Select All Batch selection options:

- mark all remotes for UL opto-adjustment.

- mark all remotes for DL opto-adjustment.

- mark all remotes for DL and UL adjustment.

Node Node list number and identification (e.g. AHFK)

Status Displays an Error if process failed. If successful the pilot tone usedand the adjustment level will be displayed.

Resulting Attenuation Compensation level used for the opto-module (in dB).

2. Mark the check-boxes corresponding to the remotes (each connected to the designated Opto-module/Opto-Splitter) to which to perform the adjustment.

3. OLA (DL/UL) may be performed on each node individually (or a batch) or on all nodes at once by marking the checkbox next to the desired corresponding Opto-module and clicking Adjust .

To easily mark all checkboxes mark the checkbox named OLA .

NOTE: The process may take several minutes depending on the size of the system and remotedistance.


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3.8 RF BalancingThe RF Balancing procedure can be performed manually (the automatic option specified in section3.8.2 will be available in the future) via the OMU II web interface.

3.8.1 Manual RF BalancingThe manual balancing procedure consists of the following steps:• Verifying a DL RF output level of 23dBm by setting the required DL attenuation of the signal.• Setting the UL attenuation according to the DL.• In case of noise, adjusting the UL attenuation to reduce noise

To balance the remote UL and DL out puts

1. Access the remote Configuration window:o Click on the Nodes button. The below pane appears

o Click Control next to the node to be balanced.

2. The resulting pane can be displayed in two views:o Basic – default view ( Basic button)o Advanced – provides more information (Advanced button)

The dialog below shows an example of the Basic (default) view.


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Figure 3-15: Example of MBF 20 Quad Band Configuration window

3. The General area provides basic identification and status information and enables assigning anidentifiable name:o Received level – opto signal level at the MBF-20 (from the optic fibre)

o Tag – identifiable name currently assigned to the unit. Click the icon to change thename.

o Model – unit type, frequencieso ID – unique serial number associated with this unit (automatically assigned by AEM)o Opto Loss Compensation – compensation allocated on the UL during the Optical Adjustment

procedure

4. In the Downlink:o Verify the Amplifier for each band is ON.o Set Attenuation to maximum value (15dB).o Lower the Attenuation level step by step until the desired Output power level is reached. In

this example +23 dBm. (Zero attenuation = maximum gain).o Verify the Amplifier Saturation is GREEN.

Views

General

Bandinformation

UL setting

DL setting


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3.8.2 Automatic Remote RF Balancing

NOTE: This feature will be available in future release.

To access the Automatic RF Adjustment pane

1. Access the OMU II Home window and click on RF Adjustment .

Figure 3-16: OMU II Main window

2. The following pane appears.

3. Select the bands of each remote to be adjusted (e.g. 1900MHz band on Node #3)

4. Adjust the following for each band:o Nominal Level (dBm)o Uplink Delta (dB)

5. Click Adjust . The procedure may take several minutes depending on the number of unitsselected.

MBF-20remote with

selected bandsto adjust


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4 Setup and Commissioning of

Remote Fibre-Fed UnitsThis chapter describes how to setup and commission the remote fiber-unit from the OMU II side.4.1 OverviewRemote Setup Overview

1. It is assumed that the remote unit is already installed.

2. Verify RF signals at OMU (DL and UL).

3. Perform OLA on each link – section 3.7.

4. Setup RF configuration on the remote

4.2 Connect to RemoteConnection to the remote requires connecting to the OMU, via RMC or via the Web-GUI. . For initialWeb-GUI connection procedure see section 3.1.

1. Click on the Nodes button.

2. Click on Control next to the remote you wish to configure.


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An example of a fibre-fed remote configuration screen is given below. Refer to the correspondingremote unit User Manual for detailed instructions on the configuration procedure.


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5 Administration

5.1 User AccountsThe OMU II comes pre-configured with default usernames and passwords in the variousadministration levels.

At the moment, updating user accounts is available only via Command Line Interface (CLI) or AxellShell. See the Common Commands and Attributes v2.0.0 document for detailed commands andsyntax or click on the Help button at the top right of the Web-GUI screen.

5.1.1 Default User Accounts

User Name Default Password Details

axell AxellPasswd Default user name.omcuname iwnkhoob Axell Element Manager user account.

This account will not generate VLI, LGO or CLR alarms.

sysadmin AxellAdmin4050 This is the system administration password which is usedfor firmware upgrades and user administration. Escalationto this level is achieved by issuing command SYSADMINfrom the user prompt.

useradmin UseradminPwd23 This account contains user administration privileges.Escalation to this level is achieved by issuing command

USERADMIN from the user prompt.

Note: It is strongly recommended to change the default user names and passwords immediately atcommissioning. This is done by using the command ACT PASSWORD . Please refer to the User

Administration section in Common Commands and Attributes document for detailed syntax, or viewthe Attribute Reference in section 5.4.

5.1.2 User Access LevelsIn this generation of the system, standard users can be promoted to login via the Web Interface,inheriting the Read-Write or Read-Only access to this interface.

There are five different access levels:

Access Level Default User Levels

Read-Only axell, omcuname, useradmin, sysadmin

Read-Write axell, omcuname, useradmin, sysadmin

Web axell

User Administrator omcuname, useradmin, sysadmin

System Administrator omcuname, sysadmin

Note: New users added to the system have read-only access.


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Users may be promoted to read-write and/or web access using the ACT USERPROMOTE command. See Common Commands and Attributes document for details on promoting users, orview the Attribute Reference in section 5.4.

Note: Users omcuname, sysadmin and useradmin cannot be promoted to Web Access due to securityreasons.

5.1.3 Change PasswordTo prevent unauthorized access, it is highly recommended to change the default password of the user.

NOTE: Note that you can only change the password for the User Name with which the session wasaccessed.

To change the Password


2. Click on Change Password .

3. For the current User Name (e.g. axell ):o Enter the New password.o Repeat the entry.

4. Click Apply .

5.2 RebootCaution! Use this function in Emergency Cases ONLY!

To reboot the Control Module:

1. Click on the Config tab.

2. Click on the Reboot icon.

3. Approve the Reboot sequence.


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5.3 Axell Shell (Command Line Interface)

To access the Axell Shell:1. Click on the Config button.

2. Select the Axell Shell option.

The Axell Shell button invokes the CLI pane. It is used to run some of the commands that arecurrently not provided by the Web GUI (user privileges and administration) and/or for advancedtroubleshooting and configurations procedures.

All configuration and management procedures can be implemented using this interface. Please refer

to the Attribute Reference section (by clicking the Cofing button on the top right and selectingAttribute Reference – see ) for detailed syntax and available commands. Additional informationmay be found in the OMU Commands and Attributes document.


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5.4 Attribute Reference

To access the Attribute Reference1. Click on the Config button.

2. Select the Attribute Reference option.

The Attribute Reference lists all available CLI commands and includes details and examples on howto use the commands. Additional information may be found in the OMU Commands and Attributes document.


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5.5 System Monitoring

5.5.1 Module Status Monitor ingModule status is shown under the Home windows once logged in. To view all monitor details clickon the Advanced mode view on the top of the screen.Green LED indicators show that the specific function is working properly. An alarm is displayed as ared blinking LED.

Module Status Monitors

Module Detailso Displays Opto-module and Node alarm status:o Opto Module:o Overall Status – if any one of the following indicators

reports an error, the overall status reports an error aswell.

o Comm. – Communication error with remote.o Firmware – Firmware related error.o Temperature – in Celcius.o Rx Opto – Error with outgoing optical signal.o Rx Opto(dBm) – shows power.o Tx Opto – Error with incoming optical signal.o Pilot Synth pilot signal OK (used in OLA

procedures)

o Nodes:o Status – General node alarm status.o Comm. – Communication error with remote.o Node Numbers – remote index numbers which are

connected to the corresponding Opto module.

Rack Status Monitors

o Displays Rack (OMU) alarm status:o Comm. – Communication error with remote.o Firmware – Firmware error.o Temperature – rack internal temperature statuso Power Voltages 2/3/4 – status of various supply voltageso Power Supplies – power supply statuso Battery – Battery related error (low battery, battery

disconnected etc.)o Overall Status – indicates overall system status.

Comm TempFirm Voltages BatteryPower Supplies Overall Status


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POI Status Monitors

o Displays UL Combiner and DL Splitter alarm status:o Overall – overall statuso Comm. – Connection to UL Combiner/ DL Splitter

module.o Firmware – Firmware related error.o Power 3 – status of all three power levels


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5.5.2 LogsThe Alarms Log displays the last 100 alarms and/or user actions on the remote system in achronological order. By hovering with the mouse over each alarm, full alarm details are available,including alarm descriptions, severities, alarm classes and time of event.

Figure 5-1. Logs

To receive a summary containing all information on a reported incident in the Log list, simply hoverwith the mouse over the specified Log and view all details contained in the Log (see below).

Figure 5-2. Logs – Summary

Column Description

Date & Time Time of occurrence

Source ID of reporting source

Description Additional alarm information (e.g Open Door, )

Icon Description

Alarm attended to and cleared.

System alarm – displayed when system functionality may be compromised.

Alarm status: OK

Alarm status: Error

Acknowledge alarm – Green = Acknowledged.

Click to change acknowledgement.Use the Ack All button to acknowledge all alarm logs.


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5.5.3 SNMP SupportThe OMU II includes SNMP support, including an SNMP Agent and SNMP traps (alarms) sent to anSNMP Manager / NOC operator.

5.5.3.1 SNMP Traps ParametersThe OMU II sends SNMP traps to user defined destination addresses.

NOTE: One destination address can currently be defined via the Web. Seven more destinationaddresses can be defined via the Axell Shell.

To configure the SNMP traps destination address

1. Click on the Configure button (top right corner).

2. Select Remote Communication .

3. In the Device:Method field, select ETH:SNMP

4. Define the SNMP trap destination IP address (additional addresses can be defined via the AxellShell.).

5. Enter the (destination address device) Trap Port and its Community parameters.

6. Click Apply .

5.5.3.2 Act ivati ng and Configuri ng the SNMP Agent

The SNMP agent provides inventory management for hosted repeaters (on which the SNMP agent isenabled) and a table of active alarms in the controller or fibre system for remote querying.

The SNMP Agent is responsible for responding to queries and carries out requests. The SNMP Agentalso provides the proprietary Axell MIB (AXELL-AM-MIB), accessible via any SNMP manager(e.g. HP OpenView).

All SNMP queries to the remote are implemented via an OMU session.

To allow SNMP agent queries• To allow SNMP queries of the OMU II – the SNMP agent must be enabled on the OMU II.• To allow SNMP queries of the remote devices via OMU II – the SNMP agent must be enabled on

the OMU II and on the remote devices.• Remote units configured with an IP address and connected to the communication infrastructure,

can be queried directly.


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To activate the OMU II SNMP Agent

1. Click on the Config button (top right corner) and select SNMP Agent Config. The following pane appears:

2. Set the SNMP Agent toggle to ON .

3. Set the port and the Read-Only community .

4. Click Apply .


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6 Troubleshooting

6.1 Troubleshooting Remote CommunicationSince many networks have their own “personality”, performing first time configuration of the remotecommunication sometimes requires tweaking of the modem parameters.This section describes some trouble shooting techniques if configuring the OMU for remote accessfails.

This illustration is a simplified schematic of the remote communication between a GSM module in anOMU and an analogue modem. The analogue modem in the computer communicates with the

Interworking Function Unit (IFU), which is the GSM network analogue network in

Documents

Axell Wireless - Omu Ii_um 00018um