Nortel Networks OPTera Metro 3500 - Manual (Page 158)

2-120 Operation, administration, and maintenance (OAM) features
OPTera Metro 3500 Multiservice Platform NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004
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.
OC-3, OC-3x4, OC-12, OC-12x4,
OC-48, OC-192 (1+1 unidirectional,
bidirectional line nonrevertive) • Lockout
• Autonomous (line failures on protection)
• Forced
• Autonomous (line failures on working)
• Manual
• High-speed exerciser
OC-48 (2-Fiber BLSR) (revertive)
OC-192 (2-Fiber BLSR) (revertive) • Lockout (protection/working)
• 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.
Table 2-27 (continued)
Services protection priority
Circuit pack Protection priority