TECHNICAL INFORMATION GUIDE

Alcatel 1650 SMC

STM-4/1 Optical Multi-Service Node

Table of Contents

Introduction............................................................................................................ 2

1650SMC Advantages ............................................................................................ 2

1650SMC Applications............................................................................................ 3

Product Description ................................................................................................ 3

Functional Description............................................................................................ 4

SDH Cross Connect subsystem....................................................................................5

Clock reference .........................................................................................................5

Control subsystem......................................................................................................5

STM-1/4 interfaces subsystem .....................................................................................6

Traffic port subsystem.................................................................................................6

ISA Matrix switch subsystem ........................................................................................8

Auxiliary and overhead subsystem ............................................................................. 10

Power subsystem...................................................................................................... 11

Physical description .................................................................................................. 11

Abbreviations .......................................................................................................... 12

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ALCATEL 2 >

Alcatel 1650 SMC / Release 4

Introduction

.SDH (Synchronous Digital Hierarchy) is today the
dominant transport technology in metropolitan and
regional networks.

With the ever-growing demand for high-speed data
communications, Alcatel enhances its leading portfolio of
optical transport equipment with data-aware

functionality – aggregation, switching and forwarding
traffic in the proper data layer – to deliver high
performance multi-technology networking solutions.

Alcatel’s Optical Multi-Service Nodes (OMSN) –
equipped with ISA (Integrated Service Adapter) plug-in

modules – provide world-class Next Generation SDH
functionality and capacity through aggregation of
broadband multi-protocol traffic patterns such as

Ethernet, MPLS, ATM and Packet Ring.

Alcatel 1650 SMC Optical Multi-Service Node is an ideal

space saving, next-generation multi-service building
block for local and metropolitan networks, providing
unmatched performances for its room occupation.

1650SMC offers telecom carriers and service providers
the powerful solution to build intelligent optical
networks with integrated TDM and Packet capabilities

and achieve the optimal balance between new
competitive service offerings and traditional revenue-
generating services.

The Alcatel 1650SMC is compliant with the Synchronous
Digital Hierarchy (SDH) defined in ITU-T

Recommendation G.707.
It can be configured as a Multi Line Terminal
Multiplexer, as an Add/Drop Multiplexer or as small

cross-connect for applications in linear links, rings, and
meshed networks. In all applications various network
protection mechanisms are provided.

Alcatel 1650 SMC features all standard PDH and SDH
interfaces from 2Mbps to 622 Mbps and offers Integrated
Service Adapter (ISA) modules specifically designed for

rate-adaptive transport of Ethernet and Gigabit
Ethernet traffic patterns through the optical network
optimizing the transport infrastructure to new data

traffic patterns:

− Ethernet, Gigabit Ethernet, ATM and MPLS-based

Packet Ring switching capabilities for improved data

streams’ connectivity

− cost-effective management and transport of packet-

based data applications within the existing optical
infrastructure – no need to add specific overlay data

networks

− ability to create new revenues from today’s and

future competitive data services by enforcing and
verifying SLAs (Service Level Agreements) based on
embedded QoS (Quality of Service) patterns.

All this makes the Alcatel 1650 SMC act as an ideal
multi-protocol transport node that reveals its
outstanding performance when used as building block in

access/edge metro rings, where traffic coming from
different clients can be consolidated into common SDH
transport resources by means of cell- or packet-based

statistical multiplexing.

1650SMC Advantages

The main strategic advantages of the OMSN family are:

− Completeness: a comprehensive range of network

elements for all transmission needs, from customer
premises applications to metropolitan networks, to
long-haul and ultra long-haul terrestrial and trans-

oceanic applications.

− Simplicity: the unnumbered possibilities offered by

OMSN for network construction are provided by the

fewest building blocks. Reuse of modules between
different systems is almost total.

− Future-readiness: in addition to traditional

transmission applications, OMSN deals effectively

with data traffic patterns providing aggregation,
switching and forwarding traffic in the proper data

layer.

− Backward compatibility: OMSN guarantees full

inter-working with the existing installed base in
broad terms: from optical compatibility, to DCC

(Data Communications Channels) compatibility, to
network management. In other words, existing
networks can be upgraded with new equipment

without constraints.

− Cost-effectiveness: by sharing replaceable units

(common parts as well as traffic ports) among

different systems but also reusing entire shelves for

stand-alone ADM and large Cross-Connects
configurations, network operators can largely reduce

the impact of spare holding and personnel training

which typically affect overall network operation
costs. The installation of one equipment where

several similar or different ones are normally used

brings relief to costs of ownership.

− Management: no matter how the network is built or

what networking technologies are used for edge and

backbone applications (Ethernet, ATM, SDH, WDM)
OMSN delivers one unified management solution.

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In addition, 1650SMC brings the following specific
benefits:

− Flexibility: a Compact ADM-4 card concentrates two

STM-4 or STM-1 plug in modules, SDH matrix,

synchronization functions and equipment control
management. The Compact ADM cards can be 1+1
EPS protected. Three slots are then available for

allocation of traffic ports, where flexibility is total.
The system may be configured for example as
2xSTM-4 rings cross-connect exploiting the

maximum drop capacity of 12x STM-1 signals or 63 x
2Mbit/s. Multiple SNCP rings may be terminated by
the same node (e.g. up to 8 x STM-1 rings). The VC

cross-connect size provides full connectivity at all VC
layers for up to 32x32 STM-1 equivalent payloads.

− Reliability: 1650SMC offers two types of network

protections: Linear Multiplex Section Protection
(MSP) and Sub-Network Connection Protection
(SNCP). Node protection in addition to line

protection is possible as all replaceable units are
optionally redundant. Power supply protection is

inherent as the DC/DC conversion function is
distributed on each card.

− Easiness: 1650SMC has a centralized control

architecture that limits the presence of processors
and software to the Equipment Controller and
Matrix units and to the ATM and ISA PR-EA switch

card. Traffic ports have no on-board processors and
are common to the family members. 1650SMC also
offers local and remote SW download, has the

minimum possible set of replaceable items and
hugely shares hardware items with other members
of the OMSN family.

Figure 1 1650SMC Multiplexing structure

1650SMC Applications

The 1650SMC can be used for transmission over G.652,
G.653 and G.654 fibers. The main applications can be
identified in the following areas:

− Customer premises;

− Local and Metropolitan Rings;
− Regional meshed backbones;

− Point to point links with intermediate drop/insert

and/or regeneration stations;

− Multi-service data-centric Metro Edge context;

Alcatel 1650 SMC Optical Multi-Service Node offers

integrated data-aware capabilities that help
improving bandwidth utilization and network

dimensioning. Alcatel 1650 SMC acts as an ideal
multi-protocol transport node that allows
consolidation of different traffic patterns (TDM,

ATM, IP, Ethernet, Packet Ring) onto shared SDH
VCs, while performing traffic control functions such
as shaping and policing, which are vital to avoid

network congestion and to provide QoS.

Product Description

1650SMC is an STM-1/4 Network Element for

transmission and cross-connection of a wide range of
PDH and SDH signals. It can operate as a multi
Terminal or as cross connect with up to 28xSTM-1

equivalent ports capacity. The matrix size is 32x32 STM-
1 equivalent at the High Order and Low Order VC level.

Figure 1 shows the multiplexing schemes implemented

by 1650SMC.

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The traffic units can be plesiochronous (PDH) or
synchronous (SDH). The plug-in cards can be of the
following types:

− 63x2Mbit/s unit;

− 63x2Mbit/s unit G.703/ISDN-PRA unit;
− 3x34/45Mbit/s Switchable unit;
− 4x140Mbit/s-STM-1 Switchable electrical unit;

− 4xSTM-1 electrical unit;

− 4xSTM-1 electrical/optical unit;

− 1xSTM-4 optical unit;

− ATM switch (4x4 VC-4) unit;
− 11x10/100 BaseT i/f Ethernet unit;
− 14x10/100 BaseT i/f Ethernet access unit;

− 4xGigabit Ethernet rate adaptive unit;

− Packet Ring modules:

•

Packet Ring Edge Aggregator with 4x10/100

BaseT i/f;

•

Packet Ring Edge Aggregator with 1Gbit

Ethernet i/f.

Equipment Controller, SDH Matrix and clock reference
unit are centralized into Compact ADM cards that can
host STM-1 and STM-4 plug-in modules:

− Compact ADM-1 up to 2 x STM-1 modules or 1 x

STM-4 plus 1 x STM-1;

− Compact ADM-4 up to 2 x STM-1/4 modules or

mixed configuration.

All electrical traffic ports can be optionally protected in

N+1 configuration.

According to the network topology, single ended and dual
ended MSP (Multiplex Section Protection) can be

implemented between any STM-n interfaces. SNCP (Sub
Network Connection Protection) inherent (SNCP/I) as
well as non-intrusive (SNCP/N) are also provided at all

VCi levels.

The SDH ports that participate in a protection scheme
(MSP or SNCP) can be flexibly selected by craft terminal

or management system, regardless of their position in
the shelf (traffic port or access module).
1650SMC can realize non-intrusive Path Overhead

Monitoring (POM) functions on 100% of Low Order and
High Order VCs.

Short and long haul optical interfaces are available for

STM-1 and STM-4 interfaces. STM-1 interfaces can also
perform bi-directional transmission over a single fiber by
means of splitters/combiners.

A software protocol between the two ends makes sure
that fiber cuts are properly detected and generate LOS
alarms even in presence of signal reflection.

A centralized matrix implements the cross-connect
function. The full non-blocking matrix allows cross–
connection of up to 32x32 STM-1 equivalent at High

Order level and Low Order level between all traffic ports.

A wide auxiliary capacity, in accordance with SDH
standards, is available for embedded services. An

Engineering Order Wire channel, with DTMF signaling,
can be accessed by a micro-telephone for maintenance
facility.

The clock reference function, located in the Compact
ADM units, synchronizes the 1650SMC and provides
generation and distribution of a synchronization clock.

The clock can be locked to an external 2MHz or 2Mb/s
source, to any STM-N ports or 2Mbit/s traffic ports or to
the internal oscillator. The SSM (Synchronization Status

Message) quality and priority algorithms are supported.

The Equipment Controller, located on the Compact ADM

cards, provides configuration, alarm status and
performance monitoring data. A software download
facility (Local and Remote) is available in order to update

the complete software of the control subsystem.

The system can be managed either by a CMISE Craft

Terminal running on a Personal Computer attached to

the F interface or by the Alcatel OMSN Network
Management System through the Q interface.

Moreover, the 1650SMC can work as a Mediation Device

for Alcatel NEs accessible through the Q2/RQ2 interface.
In this way, it is possible to transport information about

alarms and configurations of PDH or/and Access System

to/from a centralized TMN using the standard SDH DCC
network.

DC/DC converters, located on each board, guarantee

powering of the system. The distribution of power
supplies inherently guarantees protection.

Functional Description

The equipment consists of the following subsystems:

− Compact ADM subsystem, composed of:

•

SDH Vci cross-connect subsystem;

•

Clock Reference subsystem;

•

Equipment Control subsystem;

•

2 x STM-1/4 interfaces;

− Traffic port subsystem

•

ISA Matrix switch subsystem

•

Auxiliary and overhead subsystem

•

Power subsystem

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SDH Cross Connect subsystem

The 1650SMC SDH cross-connect is built upon a non-

blocking matrix that can interconnect AU4s, TU3s and
TU12s between any SDH or PDH ports accessing the
system.

Several types of connections may be established, such as:
− ·unidirectional point-to-point;

− ·bidirectional point-to-point;

− ·unidirectional point-to-multipoint;
− ·SNCP Drop & Continue;

The capacity of the matrix is 32x32 STM-1 equivalent
ports at the High Order and Low Order VC level.

Table 1 High Order/Low Order connectivity for 1650SMC

The SDH VC matrix implements single-ended SNCP/N

(non-intrusive) and SNCP/I (inherent) protections.

Clock reference

The synchronization subsystem provides the timing

reference required by all components in the network
element and represents the SDH Equipment Clock

(SEC). The subsystem performs the functionality
identified by the ITU-T recommendation G.783 as SDH
Equipment Timing Source (SETS). The SDH Matrix unit

realizes the SETS function

The SETS accepts synchronization inputs from a number
of sources:
− STM-n lines;

− 2Mb/s traffic ports;

− 2MHz / 2Mb/s external input;
− Internal oscillator.

Automatic selection of one of those sources is achieved by
selector B using either quality (SSM algorithm) or

priority criteria. Also manual selection is possible.
The SETS function produces two outputs.
The NE clock reference is used as internal timing source

and to synchronize the outgoing SDH STM-n signals.
Two external 2MHz or 2Mb/s outputs are generated as a
possible source for external devices.

Up to 6 candidate references may be selected among all
STM-n and 2Mb/s traffic ports in the system. Two 2MHz
or 2Mb/s external inputs and two outputs are available.

When configured as 2Mb/s, the external I/Os can carry
the SSM timing marker information.

The SETG function has three modes of operation: locked,

holdover and free-running. In holdover mode, the SETG
holds the frequency of the last valid reference with a

maximum drift of 0.37ppm per day. The accuracy of the
local oscillator is 4.6 ppm. When the SDH matrix is
protected in 1+1 configuration, also the Clock Reference

function is protected.

Control subsystem

The control subsystem realizes the Synchronous

Equipment Management Function (SEMF) defined by
ITU-T Recommendation G.783. It communicates with

external management systems through a standard QB3

CMIP interface.
The management information model is compliant to the

ITU-T G.774 series of recommendations.

Communication with the local craft terminal is also
based on the same interface.

The control subsystem is responsible for applying the

configuration requested by the element manager or craft
terminal and to report the status of the equipment as

well as alarm and performance information. It is also

responsible to drive automatic protection switching.
1650SMC has centralized control architecture, built upon

a two-level model:

− Equipment Controller (EC) for DCC networking,

CT/OS interface and data-base management;

− Shelf Controller (SC) for provisioning, alarm

detection, performance monitoring and equipment

protection switching.

Two microprocessors are dedicated respectively to the EC

and SC functions. They communicate through an

internal bus (ISSB / Intra Shelf Serial Bus).
The Shelf Controller processor interfaces directly

through a backplane parallel bus (ISPB / Intra Shelf

Parallel Bus) all circuits (ASICs) implementing the SDH
functions in the shelf, for data collection (alarms,

performance monitoring) and configuration provisioning

purposes.

STM-1 STM-4 ports

140Mb/s

ports

34Mb/s
45Mb/s

ports

2Mb/s

ports

Ports

AU-4 TU-3 TU-12

VC-4

VC-3

VC-12

AU-4

Yes - - Yes -

-

TU-3

- Yes -

- Yes -

STM-1
STM-4

TU-12

- -

Yes - - Yes

140Mb/s

VC-4

Yes - - Yes -

-

34Mb/s
45Mb/s

VC-3

- Yes -

- Yes -

2Mb/s

VC-12

- -

Yes - - Yes

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The Message Communication Function (MCF)
implemented by the Equipment Controller can manage
up to 8 DCC channels. Selection of the STM-n ports and

of the DCCm or DDCr channel is performed via Local
Craft Terminal.

A PCMCIA Flash Card located in the Equipment

Controller unit provides Mass storage for the
configuration database and SW package. The Equipment
Controller can also perform mediation device functions

for co-located Alcatel equipment managed through the
Q2/RQ2 interface.
The management information directed to or retrieved

from Q2/RQ2 Network Elements (e.g. access
multiplexers, microwave radio systems, PDH terminals)
connected to the 1650SMC is transported through the

SDH DCCs to the TMN, thereby avoiding the
deployment of additional data communication networks.

When the Compact ADM card is protected in 1+1
configuration matrix and the Shelf Controller function
are protected.

A failure on the Equipment Controller unit has neither
impact on traffic, nor on automatic protection switching
functions managed by the Shelf Controller processor of

the SDH matrix unit.

STM-1/4 interfaces subsystem

Compact ADM-1 card can host 2 STM-1 optical plug in

modules, or 1 STM-4 optical plug in module plus 1 STM-
1 modules.

Compact ADM-4 can host 2 STM-4optical plug in or

mixed configuration of STM-1 and STM-4.

Traffic port subsystem

SDH and PDH traffic ports are available through the
following units:
− 63x2Mbit/s unit;

− 63x2Mbit/s unit G.703/ISDN-PRA unit;

− 3x34/45Mbit/s Switchable unit;

− 4x140Mbit/s-STM-1 Switchable electrical unit;
− 4xSTM-1 electrical unit;
− 4xSTM-1 electrical/optical unit;

− 1xSTM-4 optical unit;

− ATM switch (4x4 VC-4) unit;

− 11x10/100 BaseT i/f Ethernet unit;

− 14x10/100 BaseT i/f Ethernet access unit;
− 4xGigabit Ethernet rate adaptive unit;
− Packet Ring modules:

•

Packet Ring Edge Aggregator with 4x10/100

BaseT i/f;

•

Packet Ring Edge Aggregator with 1Gbit

Ethernet i/f.

63 x 2Mb/s unit

The unit provides the physical interface for the
asynchronous mapping of G.703 2Mb/s signals into SDH

VC12s.Each unit supports 63 interfaces.
The unit is the same for 75

Ω and 120Ω applications.

Impedance match is performed at the access module
level. 21x2Mb/s 75

Ω and 21x2Mb/s 120Ω access modules

provide the G.703 interconnection interfaces.

The Retiming unit implements the 2Mb/s retiming
function allowing synchronizing the outgoing 2Mbit/s

signals with the internal clock reference.
Retiming can be enabled/disabled at the 2Mb/s port level.
1650SMC can house up to 1+1 63x2Mb/s units and 3

21x2Mb/s access modules in the shelf.

3 x 34Mb/s / 45Mb/s unit

The unit provides the physical interface for the
asynchronous mapping of G.703 34Mb/s or 45Mb/s
signals into SDH VC3s. Each unit supports 3 interfaces.

The selection of the working mode (3x34Mb/s or

3x45Mb/s) is controlled via software.
Two dedicated access modules (3x34Mb/s and 3x45Mb/s)
are used for the 34Mb/s (75

Ω) and 45Mb/s (100Ω)

applications.

1650SMC can house up to 3 3x34M/45M units and 3

3x34Mb/s or 3x45Mb/s access modules.
Possible configurations: unprotected 3+0, 2+1 protection.

4 x 140Mb/s / STM-1 unit

The unit provides four bi-directional 140/155Mb/s G.703

interfaces. The selection of the working mode (per port)
is controlled via software.

The electrical interfaces are available on a

4x140/155Mb/s access module.
When a port is configured as STM-1, the VC4 can either
be unstructured or structured into lower order VCs.

1650SMC can host up to 3+0 or 2+1 unit and 3 access
modules.

4 x STM-1 electrical unit

The unit provides four bi-directional STM-1 G.703

interfaces. The electrical interfaces are available on a
4xSTM-1 electrical access module.
For each STM-1 the VC4 can either be unstructured or

structured into lower order VCs.
1650SMC can host up to 3+0 or 2+1 unit and 3 access
modules.

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4 x STM-1 electrical / optical unit

The 4xSTM-1 electrical/optical unit provides four
electrical (G.703) or optical (several types) STM-1

interfaces.

The unit can host 2 replaceable STM-1 electrical or
optical (short or long haul) plug-in modules.

2 additional STM-1 interfaces managed by the unit are
available in the access area of the shelf by means of an
adapter housing the STM-1 electrical/optical plug-in

modules.
Any combination of electrical or optical (short or long
haul) is possible on the same unit.

1650SMC can house up to three 4xSTM-1 units.

The electrical or optical STM-1 interfaces can participate
in any combinations of 1+1 linear MSP or SNCP schemes

that can flexibly be established by craft terminal or
management system.

Ports participating in the protection scheme may belong
to the same unit or to different modules, including STM-
1 interfaces on Compact ADM card.

1 x STM-4 optical unit

The 1xSTM-4 optical unit provides one STM-4 optical

interface (on front panel). Several short and long haul
types are available.

1650SMC can house up to three 1xSTM-4 units.

The STM-4 interfaces can participate in any
combinations of 1+1 linear MSP or SNCP schemes that

can flexibly be set up by craft terminal or management

system.

ISA Ethernet 10/100 BaseT

ISA Ethernet module provides 10/100baseT interfaces
allowing the interconnection of two LANs in a point-to-

point configuration.

The major benefits that can be experienced utilizing ISA
Ethernet card in the SDH networks are:

− Interfaces cost reduction;

− Bandwidth shaping according to clients needs.

The interface cost reduction is achieved thanks to the
native interfaces provided on the board that allow

replacing the expensive up-link ports, which use the POS
(Packet Over SDH/SONET), traditionally. This leads to
an infrastructures optimization of the operator and cost

reduction for the end-user.

The bandwidth can be allocated to the end users in
accordance with the real need, independently from the

interface type.

The main board is 1 slot wide and can be housed in any
slot of the three slots available for traffic ports; it
provides 11 10BaseT/100BaseT interfaces. The access

module, to be allocated into the access area of the
1650SMC shelf, provides 14 additional
10BaseT/100BaseT interfaces.

The connection capacity towards the back panel of ISA
port is 4xVC4 equivalent. Up to three ISA Ethernet main
port + three ISA Ethernet Access module can be hosted

into 1650SMC shelf.
The unit is able to execute a rate-adapting action; hence
it is able to cross–connect a 10/100Mbit/s Ethernet

stream into an SDH virtual container of any dimension
(VC12, VC3, VC4).

The Ethernet frames received through the native

interfaces are mapped using the GFP protocol into the
SDH VC-x and then transmitted through the SDH.

Data transfer rate from Customer equipment is limited
in accordance with SDH capacity by the 802.3x flow
control mechanism.

The flow control mechanism is used to prevent the
congestion of the transmission network that may cause
packet discarding.

Full transparency with respect of the upper layer
protocols is maintained.

SDH bandwidth allocation can be managed following two

approaches:

− Each Ethernet interface is independently mapped

into 1xVC12/VC3/VC4. The container is then cross-

connected in the matrix as any other VC tributary.

− Each Ethernet interface can be mapped as N x

VC12/VC3 through the usage of packet

concatenation. Each VC runs independently inside

the SDH network; for each of these VC a dedicated
cross-connection is required inside the matrix.

Thanks to the information contained into the GFP

Header the frames are re-aligned at the sink side.

ISA Gigabit Ethernet

ISA Gigabit Ethernet provides 1000BaseSX/1000BaseLX
interfaces allowing the interconnection of two LANs in a

point-to-point configuration.

The card allows realizing the following connections in the
SDH Network:

− Transport of a Gigabit Ethernet signal between two

data equipment.

− Guaranteed QoS between end points over the

network.

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These features comply with the following standards:

− IEEE 802.3z (gigabit interfaces)

− ITU G.707 and G.783 (including virtual

concatenation)

Gigabit-Ethernet port card can host up to four 1000Base
SX/LX interfaces SFP (Small Form Factor Pluggable).
Gigabit-Ethernet port card can be located in any traffic

ports slot.

The throughput towards the back panel is 622 Mb/s.

Up to twelve Gigabit Ethernet interfaces can be provided
in one shelf.
The traffic received by the 1000baseSX or 1000baseLX

Ethernet interfaces on the ISA-GbE card is mapped into
a number of VC-4 SDH containers, more precisely the
Gigabit Ethernet traffic passing trough 1 x Gigabit

Ethernet physical interface is mapped into a specific VC-
4-xv (x=12,3,4,5,6,7) structure using the standard virtual
concatenation.

Each Gigabit Ethernet frame is mapped without
modifications into a generic framing procedure frame

(GFP-ITU-T G.7041).

The flow control mechanism, implemented in accordance
with IEEE 802.3x, is used to prevent the congestion of

the transmission network that may cause packet
discarding.

ISA Matrix switch subsystem
1650SMC provides world-class next generation SDH
functionality and capacity through aggregation of

broadband multi-protocol traffic patterns.

Alcatel 1650 SMC can be equipped with Integrated
Service Adapter (ISA) plug-in modules that perform ATM

and Packet Ring transport and switching functions for
Virtual Private LAN Services at variable bit rates.

ISA ATM plug-in modules

For ATM-based network solutions, ISA-ATM plug-in
board on Alcatel 1650 SMC is the optimal solution for

transport and aggregation of ATM traffic. Digital
Subscriber Line (DSL), Local Multipoint Distribution
Service (LMDS) and UTRAN (UMTS Terrestrial Access

Network) are among the applications in which operators
and service providers can take benefit from deploying
ISA-ATM for optimal network utilization and cost-

effective network operation.

1650SMC can host ISA-ATM card 600 Mbps (1 slot wide
plug-in card) that uses ports located in modules
(traditional traffic ports) that are equipped in the OMSN

node that is hosting the ISA-ATM card.

ISA-ATM card 600 Mbps has an equivalent front-end of 4
structured VC-4s. Up to 16 ATM interfaces can be

connected to ISA ATM switch.

ISA-ATM V2 card 600 Mbps has an equivalent front-end
of 4 structured VC-4s. Up to 252 ATM interfaces can be

connected to ISA ATM V2 switch.

Up to two ISA ATM can be equipped into 1650SMC in

any of the available traffic slots; 1+1 protection 1+1 is
supported.

ISA ATM ports support point to point and point to

multipoint PVC (also referred as Hard-PVC) and Soft-
PVC connections.

Hard-PVC connection has to be provisioned, manually
(CT, EML) or automatically (higher layer management)
by the management platforms, node by node along the

entire connection path.

Soft-PVC connection has to be provisioned at the

extremities (defining VPI and VCI) while are signaled
and maintained along the path by PNNI protocol.

ISA-ATM supports the following traffic types:

− UBR;
− UBR+;
− CBR;

− VBR-rt, nrt;

− GFR.2.

Traffic congestion avoidance is guaranteed via Selective
Cell Discard (SCD) and combined Early and Tail Packet

Discard mechanisms (EPD, TPD).

ATM OAM (AIS, RDI, LOC, TSF) end-to-end, non-
intrusive monitoring and performance monitoring are

supported for maintenance purposes.

ISA ATM V2 has the same set of features of ISA ATM
with the addition enhanced E1 number of ports and IMA

functionality for UMTS application.

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The following table summarizes the different kinds of
physical interfaces that can be terminated on the ISA-
ATM matrix:

1-slot wide ATM module

Throughput

600 Mbps

(4 x VC-4 equivalent)

Switching capability

VC and VP switching

OMSN PDH Ports

E1 (up to 16)

E1 (up to 252)

E3 (up to 12)

OMSN SDH Ports

VC-12 (up to 16)

VC-3 (up to 12)

STM-1 (up to 4)

Local Port

STM-1 mini-drawer

ATM ports number

16 (any mix of ports)

Connections

2000 max (VC or VP)

VC/VP connection

Hard VCC/VPC

Soft VCC/VPC PNNI)

Policing

UPC and NPC (VC/VP)

Shaping

Input and output (VC/VP)

Congestion mgm.

TPD, EPD, SCD

OAM

AIS, RDI, CC

Signalling

PNNI 1.0

Switch architecture

Shared memory with a total
buffer capacity of 64K cells

Table 2 ISA ATM characteristics

ISA Packet Ring switches

ISA Packet Ring modules provide the solution to
integrate Ethernet switching capability, multiple VLAN

services and Layer 2 Virtual Private Networks (L2-VPN)

into the optical transport network following the
smoothest and most cost-effective path.

ISA Packet Ring Edge Aggregator plug-in card is based

on Ethernet over MPLS technology and implement the
natural evolution from point-to-point Ethernet leased

lines towards point-to-multipoint and any-to-any

Ethernet architectures.

Its MPLS core engine ultimately ensures carrier-class
Ethernet with QoS-based Service Level Agreements
(SLA).

ISA packet ring card is composed of:
− ISA-PR-EA card 1.6 Gbps (1 slot wide plug-in card)

providing Ethernet 10/100 BaseT, 1000 Base SX/LX
(SFP optical modules):

•

PR-EA with 4x 10/100 i/f;

•

PR-EA with 1x1000 i/f.

Up to two ISA PR-EA can be equipped into 1650SMC in
any of the available traffic slots. 1+1 Protection is
supported.

ISA packet ring cards Ethernet services portfolio
includes:
− Virtual Private E-Line;

− Virtual Private E-LAN;

− Broadband Access & Distribution..

ISA packet ring cards supports the following Service SLA

attributes:
− Guaranteed;

− Regulated;
− Best Effort.

Per packet wire speed classification and prioritization
criteria includes:

− Port;
− 802.1p/q;

− SA, DA;

− TOS, DSCP;
− MPLS label (exp bits).

Traffic congestion avoidance is guaranteed via network
wide Global Congestion Avoidance Control jointly
providing statistical multiplexing for the Best effort

traffic burstiness.

Packets are forwarded towards their destination
according to the following criteria:

•

Port;

•

802.1q;

•

MPLS Label.

•

DA;

TECHNICAL INFORMATION GUIDE

ALCATEL 10 >

Alcatel 1650 SMC / Release 4

Auxiliary and overhead subsystem

The SDH standard offers a wide range of service

channels in the Section Overhead (SOH) and Path
Overhead (POH) bytes of the synchronous frame.

These bytes are used for alignment word, parity check,

network management operations; performance
monitoring; some data and orderwire channels are
available to the user.

Overhead bytes managed by the 1650SMC are listed in
the following tables.

Table 3 Supported Regeneretor Section OH bytes

Table 4 Supported Multiplex Section OH bytes

Table 5 Supported VC4/VC3 Path Overhead bytes

Table 6 Supported VC12 POH bytes

TCM allows monitoring within the operator domain. The

quality within the operator’s own domain can be proven
regardless of the received quality of the signal at the

entry point of the network.

In addition to the highlighted SOH bytes, the F2 and F3

bytes of the VC4/VC3 POH can be cross-connected or

dropped locally.

All such bytes can be flexibly (i.e. upon operator request)

cross-connected from/to any SDH or PDH (34Mb/s,
45Mb/s, 140Mb/s) port in the system or from/to local
AUX/EOW terminations.

1650SM provides the following auxiliary terminations:
− 2 x V.11 (64kb/s)

− 2 x RS-232 (64kb/s)

− 2 x G.703 (64kb/s)

− 1 x G.703 (2Mb/s)

POH bytes

Description

J1 Path

Trace

B3

Path Parity check

C2 Signal

label

G1

Path status indicator (REI, RDI)

F2/F3 64kb/s

user

data

channels

H4 Multi-frame

position

indicator

RSOH bytes Description
A1-A2 Framing

bytes

J0 Section

Trace

B1

RS Parity check

E1

RS Engineering OrderWire (EOW)

F1 64kb/s

user

data

channel

D1-D3

RS DCC channels

MSOH bytes Description
B2 MS

Parity

check

K1-K2

Multiplex Section Protection (MSP)

D4-D12 MS

DCC

channels

S1

Synchronization Status Message

(SSM)

M1

MS Remote Error Indication (REI)

E2

MS Engineering Orderwire

POH bytes

Description

V5

Path Parity check, REI, RDI,

Signal label

J2 Path

Trace

TECHNICAL INFORMATION GUIDE

ALCATEL 11 >

Alcatel 1650 SMC / Release 4

Power subsystem

The architecture of the power subsystem is distributed.

The input battery power can range from –48v to –60v is
delivered without level translation to all cards in the
shelf.

Each card has an on-board DC/DC converter that
generates the necessary voltages for the on board
components.

Distribution of power supplies inherently provides
protection against single converter failures.

Physical description

Main shelf physical description
The mechanical design of the 1650SMC is based on half

19” ETSI compatible shelf, consistent with the Alcatel

standard S9 equipment practice.

The mechanical dimensions of the shelf are the following:

− 241 mm Wide x 350 mm High x 250 Deep

The cards to be housed inside the shelf have the
following dimensions:
− 265 mm High x 213 mm Deep.

The mechanical design provides EMI/EMC performances,
in compliance with ETSI standard 300 386-1

“Telecommunication Centre”.
The shelf is divided in two parts: the left side is devoted
mainly to access purposes; the right side is devoted to the

traffic units.

The access part (5 slots) can contain the following units
(88mm x 265mm):

− 1 slot for AUX, EOW, 2MHz or 2Mbit/s

synchronization I/O connection module (SERGI);

− 1 slots for general service connectors such as Power,

QB3 Int., Housekeeping, remote alarm, rack lamp,

Q2/RQ2 (CONGI);

− 3 slots for traffic access module. These slots can be

equipped with these units:

− 21x2Mbit/s access module (75Ω or 120Ω);
− 3x34 Mbit/s access module;

− 3x45 Mbit/s access module;

− 4x140/STM-1 electrical access module;
− Electrical Protection module (to be used for 34, 45,

140 and STM-1 electrical interface protection);

− 2xSTM-1 elec./opt. adapter module;

− 14xEthernet 10/100 access module;

Two slots of the right part are dedicated to Compact
ADM cards.

Three slots can be used for the allocation of traffic units:

− 63x2Mbit/s board;

− 3x34/45Mbit/s Switchable board;
− 4x140/STM-1 Switchable board;
− 4xSTM-1 elec./opt. board;

− 1xSTM-4 optical board;

− ISA Ethernet 11x10/100 BaseT;

− ISA Gigabit Ethernet 4x1000SX/LX;

− ISA ATM card;
− ISA PR-EA;

Figure 2 1650SMC physical view

The maximum quantity of each interface per shelf is:
− 63x2Mbit/s interfaces;

− 9x34 or 45 Mbit/s interfaces;
− 12x140Mbit/s interfaces;

− 16xSTM-1 electrical or optical interfaces;

− 7xSTM-4 optical interfaces;
− 75xEthernet 10/100 BaseT;

− 12xEthernet 1000 Base SX/LX;

TECHNICAL INFORMATION GUIDE

ALCATEL 12 >

Alcatel 1650 SMC / Release 4

Abbreviations

ABN ABNormal

condition

ADM Add

Drop

Multiplexer

AIS Alarm

Indication

Signal

APS Automatic

Protection

Switching

ATM

Asynchronous Transfer Mode

ATTD ATTendeD
AU Administrative

Unit

AUX AUXiliary

BA Booster

Amplifier

CRU

Clock Reference Unit

DBR Deterministic

Bit

Rate

DTMF

Dual Tone Multi Frequency

EC Equipment

Controller

ECT

Equipment Craft Terminal

EMI/EMC ElectroMagnetic Interference

ElectroMagnetic Compatibility

EOW

Engineering Order Wire

EPROM

Electrically Programmable Read Only

Memory

EPS Equipment

Protection

Switching

ETSI

European Telecommunication Standard

Institute

DXC

Digital cross Connect

IND INDicative
ITU-T

International Telecommunication Union

JE Joint

Engineering

LED Light

Emission

Diode

LOS Loss

Of

Signal

MCF

Message Communication Function

MSOH Multiplex

Section

OverHead

MSP Multiplex

Section

Protection

MS-SPRING Multiplex Section Shared Protection

RING

NE Network

Element

NURG Not

URGent

OFA

Optical Fibre Amplifier

OH OverHead

OOF

Out Of Frame

OS Operation

System

PDH

Plesiochronous Digital Hierarchy

POH Path

OverHead

ppm

Parts per million

RSOH Regeneration

Section OverHead

SBR Statistical

Bit

Rate

SEMF Synchronous

Equipment

Management

Function

SDH

Synchronous Digital Hierarchy

SNC-P

Sub Network Connection Protection

SOH Section

OverHead

SSM Synchronisation

Status

Message

STM Synchronous

Transport

Module

TMN

Telecommunication Management

Network

TSA Time

Slot

Assignment

TSI Time

Slot

Interchange

UBR Unspecified

Bit

Rate

URG URGent

VC Virtual

Channel

VC-x Virtual

Container

x

VP Virtual

Path

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.

© 08 2003 Alcatel. All rights reserved.

3AL 78976 AAAA Ed. 02