SNC/N
Sub Network Connection Non-intrusive protection or SNC/N monitoring. The
switching criteria for SNC/N are based on both signal failures and signal degrade.
Signal failures that cause SNC/N protection switch are the same as for SNC/I: AIS
(Alarm Indication Signal), UNEQ (unequipped VC), TIM (Trace Identifier Mismatch),
TU-AIS and TU-LOP (Loss of Pointer). Signal degrades that cause SNC/N protection
switching are based on the number of Errored Blocks detected during a certain period.
The Threshold that defines when a signal is declared degraded can be set by the user.
SNC/I
Sub Network Connection Inherent protection or SNC/I monitoring. The switching
criteria for SNC/I are based on signal failures.
Signal failures that cause SNC/I protection switch are:
• AIS (Alarm Indication Signal),
• UNEQ (unequipped VC),
• TIM (Trace Identifier Mismatch),
• TU-AIS
• TU-LOP (Trail Signal Failure, TSF).
Traffic provisioning
Sub-Network Connection Protection (SNCP)
....................................................................................................................................................................................................................................
365-312-807R7.2
Issue 4, May 2007
Alcatel-Lucent - Proprietary
See notice on first page
8-19
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