Nortel SONET AccessNode Manual page 33

Procedure 2-2 (continued)
Measuring optical receiver performance
Step
12
Action
CAUTION
Risk of increased optical errors
Received optical power should not exceed the overload
levels for optical interfaces meeting Nortel-to-Nortel
proprietary links:
NT7E01 OC-3 LR:
NT7E01 OC-3 IR:
NT7E02 OC-12 LR:
NT7E02 OC-12 IR:
NT7E05 OC-12 VTBM LR:
NT7E05 OC-12 VTBM IR:
The above overload levels also apply to optical interfaces in
a Bellcore TR-NWT-000253 Midspan-meet specification,
with the following exceptions:
NT7E05 OC-12 VTBM LR:
NT7E05 OC-12 VTBM IR:
Adjust the VOA to obtain the maximum acceptable reading of received
optical power for your optical interface circuit pack shown in the following
table.
PEC
NT7E01CA/CB/CC/CD
NT7E01DA/DB/DC/DD
NT7E02KA/KB/KC/KD
NT7E02LA/LB/LC/LD
NT7E05AB/AC/AD
NT7E05BB/BC/BD
Note : The above values apply to Nortel-to-Nortel proprietary links. They
also apply to Bellcore TR-NWT-000253 Midspan-meet links, with the
following exceptions:
NT7E05AB/AC/AD
NT7E05BB/BC/BD
—continued—
AccessNode Site Testing Procedures 323-3001-221 Issue 2.0
DS3 tests, STS-1 tests, and optical in-bay tests 2-15
Module
OC-3 LR
OC-3 IR
OC-12 LR
OC-12 IR
OC-12 VTBM LR
OC-12 VTBM IR
OC-12 VTBM LR
OC-12 VTBM IR
–10.0 dBm
– 8.0 dBm
– 7.0 dBm
– 4.0 dBm
0.0 dBm
0 0 dBm
.
– 8.0 dBm
– 8.0 dBm
Maximum receiver
power (P )
R max
–10.0 dBm
– 8.0 dBm
– 7.0 dBm
– 4.0 dBm
0.0 dBm
0.0 dBm
– 8.0 dBm
– 8.0 dBm