Alcatel-Lucent 1643 AMS Applications And Planning Manual page 44

Features
– Lower order VC-3 SNC/N protection (non-revertive)
– Higher order VC-4 SNC/N protection (non-revertive)
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2-12
A non-intrusively monitored subnetwork connection protection (SNC/N) relation
can be set up between any arbitrary incoming TU-3 from the east aggregate and
any arbitrary incoming TU-3 from the west aggregate line interface.
Only non-revertive operation is possible. Manual and forced switch commands
are supported. In the return channel the signal is simply bridged to both
outputs.
The maximum switch completion time is 50 ms.
In 1643 AM with STM-4 aggregates a non-intrusively monitored subnetwork
connection protection (SNC/N) relation can be set up between any arbitrary
incoming AU-4 from the east aggregate and any arbitrary incoming AU-4 from
the west aggregate line interface.
Only non-revertive operation is possible. Manual and forced switch commands
are supported. In the return channel the signal is simply bridged to both
outputs.
The maximum switch completion time is 50 ms.
Alcatel-Lucent - Proprietary
See notice on first page
Transmission protection
365-312-801R7.2
Issue 3, May 2007