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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