Vc-3 Concatenation - Alcatel-Lucent 1643 AMS User's Operation Manual

Traffic provisioning

VC-3 concatenation

...................................................................................................................................................................................................................................
Introduction
The concatenation of two VC-3s provides a mechanism to transport payloads greater
than the capacity of a single VC-3, for example to transport Ethernet data in SDH
networks. This feature is for the LAN tributary only.
A concatenated VC-3 group is indicated as VC-3-2v. V means virtual concatenation.
Virtual concatenation
Virtual concatenation allows the transport of a single VC-3-2v structure in two
individual TU-3 without the use of any concatenation indication in the pointer
bytes(which is the case for contiguous concatenation). It only requires the path
termination function to provide concatenation functionality, hence guaranteeing
interworking with other standard low order connection functions.
Termination
VC-3 concatenation is only supported without termination. This means that only VC-3
level cross connections can be made.
A VC-3-2v signal is handled like two individual VC-3 signals. The same alarms and
performance values are supported as for VC-3. The result of the VC-3-2v supervision
is copied into the two VC-3s.
• An alarm in an VC-3-2v group is displayed as one alarm for the entire group.
• Two VC-3s can have different path and path trace.
...................................................................................................................................................................................................................................
8-10 Alcatel-Lucent - Proprietary
See notice on first page
365-312-807R7.2
Issue 4, May 2007