Cisco Cisco Prisma II EDR Receiver Installation Guide
Appendix B
Module Parameter Descriptions
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78-4025693-01 Rev D
Parameter
Name (LCI)
ICIM
Abbrev.
Nominal
Value
Major
Low
Limit
Minor
Low
Limit
Minor
High
Limit
Major
High
Limit
Hys-
teresis
Operating
Range
Laser 1
Bias
Current
1, 2
LasBias1
3.7 to
5.0 A
-8.0 A
-8.0 A
-0.1 A
-0.001 A 0.001
OK or
Alarm
Laser 2
Bias
Current
1, 2
LasBias2
3.7 to
5.0 A
-8.0 A
-8.0 A
-0.1 A
-0.010 A 0.001
OK or
Alarm
Laser
Enable
Status
3
Enable
-
-
-
-
-
-
OK or
Alarm
Internal
Power
Supply
Status
4
IntPs
-
-
-
-
-
-
OK or
Alarm
Power
Supply
Status
5
PsOk
-
-
-
-
-
-
OK or
Alarm
Service
Mode
Status
3
Service
-
-
-
-
-
-
OK or
Alarm
1
Alarm limit values for this parameter are relative to the nominal alarm value.
2
Nominal laser bias values are set in manufacturing based on the characteristics of the laser
diode, and may vary from module to module. Major Low and Minor Low alarm thresholds
are intentionally set low to avoid false alarms that may be generated at high optical input
levels (a good condition that corresponds to low bias current). It is recommended that these
limits not be changed from their factory defaults.
3
The alarm values OK and Alarm correspond to the control values OFF and ON,
respectively.
4
This alarm sets the unit to the safe state, in which the optical input is disabled.
5
This alarm sets the unit to the safe state, in which the lasers are turned off and optical
output is disabled.