Alcatel 1696 Metro SpanMetropolitan DWDM System

In metropolitan areas, the need for higher bandwidth and value-

added services is becoming increasingly critical. Service

providers must find flexible and powerful solutions that can

adapt to a broad set of customer requirements. By introducing

solutions with DWDM technology into metropolitan and

enterprise networks, service providers can build a powerful

transmission platform, future proof their networks, and create a

core-to-edge optical network. The Alcatel 1696 Metro Span is

just that type of solution.

The 1696 Metro Span is a versatile metropolitan

DWDM platform that supports a broad range of

data rates that are easily customized for both

non-amplified systems of intra-city networks and

amplified systems used in large metropolitan

networks. Compact and scalable, the 1696 Metro

Span can be installed in variety of environments,

from a central office to a basement closet. Its

10.6 inch deep rack is standard and can house a

fully equipped 32 protected or 64 unprotected

channel high density system.

From an enterprise standpoint, access to such

bandwidth will come in the form of demands for

as little as a single optical channel. The Alcatel

1696 Metro Span Compact is a smaller version of

the 1696 Metro Span for just this type of lower

bandwidth site. It can be initially configured with

as little as a single channel with room for future

growth to as many as eight channels. At only five

inches high, the 1696 Metro Span Compact can

easily fit into the top of a closet or a standard

telecom rack.

Product Features Overview

Provides Optical Protection

> The Alcatel 1696 Metro Span employs

unidirectional path-switched ring (UPSR)

technology, best suited for today’s robust

networks.

> With its 8 x 8 cross point matrix, the 1696

Metro Span gives the network manager the

power to configure the best optical protection

scheme required.

Flexible and Scalable Architecture

> Designed with a compact and high-density

architecture, the Alcatel 1696 Metro Span

creates a single, cost effective solution that

can accommodate multiple services, traffic

levels and data rates.

> The 1696 Metro Span supports up to 32

protected or 64 unprotected channels at 100

Mbps to 10 Gbps.

> Multi-wavelength tunable transponders are

standard and help lower the costs associated

with spare modules.

Optical Amplification

> With its +17 dBm output, the 1696 Metro Span

offers the most advanced optical amplification

available today.

ALCATEL 1 >

THE ALCATEL 1696 METRO SPAN

VERSATILE, FLEXIBLE, SCALABLE

Ensures Optimum Performance of

Multi-Services

> Using its Universal 3R multi-rate transponder,

the 1696 Metro Span handles bit rates from

100 Mbps to 2.5 Gbps.

> The 1696 Metro Span is equipped with a 10

Gbps optical channel transponder

> With 4 x Any TDM Modules, the Alcatel 1696

Metro Span concentrates up to four low bit

rate client signals into one single 2.5 Gbps

optical channel, which provides cost-efficient

transport for low bit rate traffic by reducing

the number of required optical channels.

Performance Monitoring Capabilities

> Housekeeping access is provided in both

directions (eight inputs and eight outputs).

> Based on B1 in SONET frames, the 1696 Metro

Span is an effective solution for digital

performance monitoring.

> The 1696 Metro Span can be equipped with a

1510 nm supervisory channel.

> Operators can remotely setup end-user’s

bit rate.

> Bit error rate can be monitored on all

transported services.

> 2 ALCATEL

Alcatel 1696 Metro Span, fully populated 32W.32P channels

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Alcatel 1696 Metro Span Compact layout

The Alcatel 1696 Metro Span employs UPSR

technology. It provides two independent paths,

one westbound and one eastbound for two-fiber

ring applications. The 1696 Metro Span uses

redundant fiber optic transmission facilities in a

pair configuration. One fiber is dedicated to

transmitting in one direction, and a second fiber

transmits in the other direction. Using this

configuration, if a failure occurs on the primary

ring, the second ring takes over and the

transmission continues on to its destination.

With its 8x8 cross point matrix on the

transponders, the network manager

can select the protection scheme best suited to

match the service requirements of the customer.

Each transponder is equipped with an electrical

matrix that the network manager can control

remotely. The network manager can configure

the transponder for O/E/O regeneration, drop

and continue, or local or remote loop back. This

matrix also provides flexibility to the hub and

OADM nodes. The network manager can

configure the matrix so that the transponder can

add and drop traffic at one node, reconfigure the

same transponder to provide a pass through

connection, and later move the add and drop

capability to another node.

ALCATEL 3 >

PROVIDES OPTICAL

PROTECTION

COL

Transponders

Matrix (protect

ed)

Backpanel

Links

B&W

COL

B&W

COL

B&W

A

B

COL

Client

Equipment

To mux/

demux ETransponder

East

B&W

To mux/

demux W

Switch Matrix

Backpanel link

Transponder

West

COL

B&WMatrix

8x8

Matrix

8x8

Signal flow through the 8x8 electrical matrix

Transponder protection

When transmitting over long spans of optical

cable, amplification becomes critical. The cable

is not always purely transparent and attenuation

ensues. Using O/E/O regeneration or modulation

to boost the laser beam can limit the bandwidth

due to limitations at the electrical stage of

amplification.

The 1696 Metro Span provides for a +17 dBm

optical output. With this unique feature, the laser

beam conversion to an electrical signal is

eliminated. Instead, erbium gas, excited by an

external energy source, increases the intensity

of the laser transmission passing through the

amplifier. Therefore, without electrical

conversion, bandwidth remains at the super-high

optical level before and after amplification.

> 4 ALCATEL

OPTICAL AMPLIFICATION

Transponders

OADM

(and/or DCF)

SPV

SPV

Automatic Gain Control

Pin

Center stage optical amplifier

Deployment flexibility is important for today’s

networks, but to avoid obsolescence, scalability

of service is also crucial. Providing customers an

expanded range of choices gives service

providers a needed advantage in the

marketplace. That advantage can be reinforced

through thoughtful and controlled expansion of

the network.

The Alcatel 1696 Metro Span is designed to meet

the requirements of metropolitan networks with

its compact and high-density architecture. It

provides a single, cost effective, managed

platform that supports multiple services, traffic

levels and data rates. It is scalable up to 32

protected or 64 unprotected channels at 100

Mbps to 10 Gbps, and can be installed in virtually

any network environment from a central office to

a basement closet.

In order to reduce the number of spare

transponders, the 1696 Metro Span

uses tunable transponders. All the transponders

are tuneable over two wavelengths.

ALCATEL 5 >

FLEXIBLE AND SCALABLE

ARCHITECTURE

Mx/Dx

Red Band

Ch 25-32

Expansion

Ch 1-8

Ch 9-16

Ch 17-24

Mx/Dx

Blue Band

1969 Metro Span 32 channel architecture

Enterprise Scaling

Compatibility with metro-core DWDM

networks

While offering reduced footprint and deployment

costs over the Alcatel 1696 Metro Span for

enterprise applications, the 1696 Metro Span

Compact remains fully compatible with the

former. With identical channel plan and tunable

transponders between both platforms, they can

be mixed and matched on a single ring as

dictated by capacity demand. A common

supervisory channel maintains performance

monitoring and management capabilities

throughout the network. This mix and match

flexibility reduces the need for excess spares in

inventory, which equates to lower costs for the

service provider. Furthermore, compatible

channel plans eliminate the need for costly

O/E/O conversion, which would otherwise be

necessary to adapt wavelengths being handed off

between the two systems.

Addressing new customers and revenues

Enterprise demands originating at a significant

distance from a metro DWDM ring pose a special

challenge. Rather than denying service due to

distance limitations, the 1696 Metro Span

Compact can be used as a remote CPE platform.

Transponders and 4xAny TDM modules will

reside in the Metro Span Compact, sending

signals directly to a 1696 Metro Span node where

they will be add/dropped from a larger network.

A further reduction to deployment cost can be

obtained by eliminating the mux/demux or

OADM hardware from the CPE. Using remote

transponders and TDM modules at a CPE site

also helps reduce the amount of equipment

installed in the central office or co-location

space, saving valuable rack space.

> 6 ALCATEL

Business

Access

Small CO

Large CO

CPE

HUB

Business

Access

Business

Access

λn

1696

Metro Span

1696

Metro Span

1696

Metro Span

Compact

1696

Metro Span

Compact

Long Haul POP

Extension to a CPE location

Unlike long haul networks, where the services

are consolidated at a SDH/SONET homogeneous

bit rate (mainly 2.5 Gbps or 10 Gbps), the metro

arena encounters protocols that differ by several

orders of magnitude. The Alcatel 1696 Metro

Span efficiently puts them all under a single

umbrella, providing not only flexible connectivity

on demand, but also a common environment for

edge-to-edge management and maintenance.

With its universal 3R multi-rate transponder, the

1696 Metro Span is capable of accepting a broad

range of data rates, from 100 Mbps to 2.5 Gbps.

It carries SONET wavelengths such as OC-3,

OC-12 and OC-48, in addition to signals like ATM,

IP, ESCON, GbE, FDDI, DV, FE, FICON and fiber

channel (FC). This feature reduces the cost per

managed channel, and lets service providers

offer a complete array of services managed over

the same optical channel. The matrix creates the

maximum level of flexibility inside the metro

network and allows true optical networking—

strengthening transmission efficiency and

improving protection capabilities. With the

Alcatel 1696 Metro Span, service providers use

a single, cost optimized, managed platform,

which accommodates multiple types of services

and protocols.

Complementary to the multi-rate transponder, a

10 Gbps transponder supports services such as

OC-192 and 10 GbE WAN. The 10 Gbps

transponder presents the same great features as

the multi-rate transponder, such as tunable lasers

and an on-board 8x8 cross-point matrix.

The Alcatel 1696 Metro Span features a

dedicated 4 x Any TDM module that multiplexes

up to 4 low bit rate client signals into one single

2.5 Gbps optical channel. This concentration

provides cost-efficient transport for low bit rate

traffic by reducing the number of required

optical channels. This distinctive feature of the

1696 Metro Span does not use a proprietary TDM

multiplexing scheme. Rather, it delivers a fully

compliant SONET frame. For example, a

concentrated 2.5 Gbps signal from the Alcatel

1696 Metro Span can be directly and cost-

efficiently connected to a SONET ADM or

digital cross-connect without requiring prior

de-concentration.

ALCATEL 7 >

ENSURES OPTICAL PERFORMANCE OF

MULTI-SERVICE

Service provisioning and management can be a

costly expenditure. Alcatel understands the

importance of highly efficient management

systems and is the world’s leading supplier of

integrated management systems for optical

transport networks. The 1696 Metro Span is

designed with superior performance monitoring

capabilities that allow service providers to

implement tailored protection schemes based on

quality of service and bit rate requirements. For

example, it can monitor the quality of signals,

transmitted through the network, using a 4 x Any

TDM concentrator—based on B1 monitoring of

transported SONET frames when using a multi-

clock transponder. Also, the transponder’s bit

rate can be tuned via remote command.

The Alcatel 1696 Metro Span can monitor and

provision the entire DWDM path of the carried

signal and provides housekeeping access in both

directions (eight inputs and eight outputs). For

service providers who require it, the system can

be equipped with a 1510 nm supervisory channel.

> 8 ALCATEL

PERFORMANCE MONITORING

CAPABILITIES

Small

OADM

Long Haul

POP

Multi-Serv

ice λ

Residential

Access

Hub

1696 Metro Span

Network

CPEBusiness

Access

Business

Campus

OADM

OADM

TDM

λn

Multi-service metro network

The Alcatel 1696 Metro Span offers service

providers a single platform with maximum

bandwidth potential and superior service

capabilities. With its robust feature set, it can

handle multiple data rates and service require-

ments with ease and has the flexibility and

scalability needed to meet the requirements of

today’s metro traffic environment. The Alcatel

1696 Metro Span is an ideal edge-to-edge optical

network solution, satisfying the needs of today’s

bandwidth hungry and service dynamic market.

Look to Alcatel for all your networking needs.

We have a long-standing reputation and the

experience with building end-to-end carrier class

solutions for use on land, undersea, and across

the globe. Call us today at 1-800-ALCATEL or

1-800-252-2835, or visit us on line at

www.alcatel.com.

ALCATEL 9 >

SUMMARY

Alcatel and the Alcatel logo are registered trademarks of Alcatel. All other trademarks are the property of their respective owners. Alcatel assumes no responsibility for the accuracy of the information presented, which is subject to change without notice. © 07 2003 Alcatel. All rights reserved. 523-0620014-003A3J