Standing Conditions
SPGAIN-OOR-LO (Span-Gain Too
Low)
The corresponding SNMP name for this condition is “gainTooLowSpeq”.
AIDTYPE Default
Severity
Probable Cause Suggested Corrective Action
SPEQ MJ The required gain value
determined by the
automatic span
equalization feature for
the associated
amplifier module is less
than the minimum
value supported by that
module type.
In a colorless
configuration, this
alarm may also indicate
insufficient channel
power at the CCM-
C96/9 client ports.
1 If this is a colorless configuration, check whether there
is sufficient channel power at the CCM-C96/9 client
ports. Adjust the power levels, if required.
2 Review the span equalization provisioning values for
the power per channel, set point and gain calibration
settings and correct any erroneous values. In particular,
verify that the set point and power-per-channel
differential is within the minimum allowable gain range
of the amplifier module in use, and adjust the values as
necessary to bring the differential within the supported
range of gain supported by the amplifier.
3 Verify that the amplifier module in use is of the correct
type as determined by the optical network span
engineering plan. Exchange the amplifier module for
one of the correct type if the existing type is found to be
in error (this will require re-provisioning of the amplifier
and its supported entities, and will be service affecting).
4 Verify that any dispersion compensating elements or
optical pads along the incoming signal path are of the
correct type and value and replace any which do not
conform to the engineered values.
5 Progressing upstream towards the optical source,
verify the optical power levels of the signals supplied as
input to the amplifier supporting the entity reporting this
condition. Verify that all optical fiber cables are
correctly attached. At each equipment module, verify
that the optical transmit power of the signal sent
towards the entity reporting the condition is within
specifications and adjust provisioning values found in
error as necessary, or replace any modules which
exceed their specified maximum optical output power
levels.
6 At the optical source(s), verify that the correct optical
source is in use and that it is operating within
specifications. Replace any optical source (module or
pluggable) found to be failed or outside its operating
specifications.
Table 401: SPGAIN-OOR-LO (Standing Condition)
FSP 3000R7 Maintenance and Troubleshooting Manual - Product Release 16.2 - Document Issue A 981
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