Alcatel Carrier Internetworking Solutions 1642 Benutzerhandbuch

The system may be configured as an STM-1 add drop

multiplexer (ADM) with a termination capacity of up to
112 x 2 Mb drop for metropolitan networks or as an STM-4
multiservice terminal multiplexer with 2 x STM-1 and 
8 x E/FE interfaces, used to link several large offices to
an enterprise network.

The Alcatel 1642 EM has a symmetrical architecture,

allowing its application as terminal multiplexer, add-drop
or mini cross-connect in spur, multiple rings or meshed
topologies. All traffic ports (PDH, Ethernet or SDH) of
the same type have the same functionality and behavior
and there is no inherent split between tributaries and
aggregates. 

The Alcatel 1642 EM’s resiliency makes it ideal as a

multiservice transport node. In terms of hardware, the
Alcatel 1642 EM has a centralized control architecture
that limits the presence of processors and software to 
the compact ADM-1/4 card. Traffic ports have no on-
board processors and may be reused from one piece of
equipment to another, or retrieved from stocks without
concern about software versions. The Alcatel 1642 EM
also offers local and remote software downloads. In addi-
tion, service providers can also monitor subnets formed

by the Alcatel 1642 EM, even in multivendor networks.
Whether in telecommunications-office environments or 
at enterprise locations, the Alcatel 1642 EM has the right
powering solution (DC or AC) and optional power
redundancy can provide equipment protection.

Concerning traffic protection, sub-network connection

protection (SNCP) with drop-and-continue function is
provided for improved traffic availability, enabling the
Alcatel 1642 EM to be inserted directly into access rings
or to be connected to access rings via point-to-point,
unprotected or protected links. SNCP also enables end-
to-end protection of SDH paths. Dual hubbing to two
distinct central-office transport nodes is also possible,
e.g., via dual STM-4 uplinks.

The Alcatel 1642 EM paves the way to build unique

optical-network infrastructures, supporting optimized
transport and integrated networking functions for data
applications, such as new Ethernet VPN services.

The Alcatel OMSN family consolidates the vast expe-

rience gathered by Alcatel in optical-network architectures
through hundreds of thousands of installations world-
wide. That’s also where true reliability comes from.

A L C AT E L    

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MUX 

Storage 

Telephony 

Video 

Surveillance

CCTV 

Emergency 

Call Point 

Display 

Panels 

Ticket 

Terminal 

CCTV 

Video- 

conferencing 

RTU

TPR 

Meter 

Voice 

SCADA 

Data 

OMSN

OMSN

Power Utility

Oil and Gas

Railway

Airport

Highway/Underground

Government

Cable and TV Broadcaster

Enterprise

Corporate 

OMSN

OMSN

1642 EM

1642 EM

1642 EM

1642 EM