Nortel Networks OPTera Metro 3500 - Manual (Page 150)

2-112 Operation, administration, and maintenance (OAM) features
OPTera Metro 3500 Multiservice Platform NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004
Physical PMs are gauge type readings that can go up or down during a
collection period.
Two parameters are used to evaluate received optical power performance:
• optical power received un-normalized (OPR)
• optical power received normalized (OPRN)
OPR
OPR is a measurement of the received optical signal in dBm. In Site Manager,
OPR is displayed in exponential form. OPR values are collected and recorded
every second and are un-normalized. OPR is used to calculate OPRN.
OC-48 ER DWDM circuit pack (1557.36nm) NTN408DA
OC-192 IR circuit pack NTN445CB
OC-192 LR G.709 FEC circuit pack NTN445DA
OC-192 DWDM G.709 FEC circuit pack (1535.04nm) NTN445JA
OC-192 DWDM G.709 FEC circuit pack (1528.77nm) NTN445EA
OC-192 DWDM G.709 FEC circuit pack (1533.47nm) NTN445EB
OC-192 DWDM G.709 FEC circuit pack (1530.33nm) NTN445EC
OC-192 DWDM G.709 FEC circuit pack (1531.90nm) NTN445ED
OC-192 DWDM G.709 FEC circuit pack (1538.19nm) NTN445FA
OC-192 DWDM G.709 FEC circuit pack (1542.94nm) NTN445FB
OC-192 DWDM G.709 FEC circuit pack (1539.77nm) NTN445FC
OC-192 DWDM G.709 FEC circuit pack (1541.35nm) NTN445FD
Table 2-26
OC-48 and OC-192 circuit packs supporting receive optical power
Description PEC
OC-48 STS SR circuit pack NTN440HA
OC-48 STS IR circuit pack NTN440KA
OC-48 STS LR circuit pack NTN440LA
OC-48 ELR interface circuit (1550nm) NTN440FA