2-120Operation, administration, and maintenance (OAM) features

Table 2-27 (continued)

Services protection priority

Circuit pack

Protection priority

 

 

OC-3, OC-3x4, OC-12, OC-12x4,

• Lockout

OC-48, OC-192 (1+1 unidirectional,

• Autonomous (line failures on protection)

bidirectional line nonrevertive)

• Forced

 

 

• Autonomous (line failures on working)

 

• Manual

 

High-speed exerciser

 

 

OC-48 (2-Fiber BLSR) (revertive)

• Lockout (protection/working)

OC-192 (2-Fiber BLSR) (revertive)

• Forced Switch of Working - Ring

 

 

• Signal Failed on Working - Ring

 

• Signal Degraded on Protection

 

• Signal Degraded on Working - Ring

 

• Manual Switch of Working - Ring

 

• Wait to Restore

 

• Exerciser - Ring

 

• Reversed Request - Ring

 

 

Note: DS1 user protection switch requests (including manual, forced and lockouts) are automatically cleared after a network element power failure/recovery.

Protection performance monitoring parameters for optical facilities

The OPTera Metro 3500 network elements support the following protection performance monitoring (PM) parameters for OC-3, OC-12, OC-48 and OC-192 facilities:

protection switch count-working (PSC-W)

protection switch count-protection (PSC-P)

protection switch duration (PSD)

The protection PM parameters are available for OC-3, OC-12, OC-48 and OC-192 facilities (see Note). When the facilities are not protected, the protection PM parameters are fixed at 0.

Note: Protection PM parameters are not available for the OC-3 optical interface, EC-1x3, and EC-1x12 circuit packs. For these circuit packs, the protection PM parameters are fixed at 0.

OPTera Metro 3500 Multiservice Platform NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004

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Nortel Networks NTRN10AN, 3500 manual 120Operation, administration, and maintenance OAM features