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7-38 Replacing modules in a common-equipment shelf
Procedure 7-16 (continued)
Replacing an NT7E05 OC-12 VTBM optical interface
Step
1
2
3
4
5
AccessNode P0904244 Issue 1.0
Action
From the Network Element Status screen, display the OC-12 detailed
protection screen:
pr;dtlprot oc12↵
The detailed protection screen appears.
Switch service from the OC-12 being replaced, to the standby OC-12:
manual op <group>↵
y↵
where
<group>
is the group number of the OC-12 being replaced: g1 or g2.
The system prompts for confirmation.
If protection switching is set for
bidirectional
unidirectional
When unidirectional protection switching is provisioned, traffic must also be
switched at the far-end NE. Log in to the far-end NE and perform a protection
switch as was performed in steps 1 and 2. After traffic has been switched at
the far-end NE, proceed to step 4.
Display the facility screen for the OC-12 to be replaced:
fa oc12 <group>↵
where
<group>
is the group number of the OC-12 being replaced: g1 or g2.
The OC-12 facility screen appears.
To prevent alarms from being raised when the circuit pack is removed,
change the state of the OC-12 facility to out-of-service (OOS):
chgstate oos↵
y↵
The state of the OC-12 facility changes to out-of-service (OOS).
For unidirectional protection switching, also take the corresponding OC-12
out of service at the far-end NE.
Note: When the optical facility is taken out of service, the status of the loss of
signal (LOS) LED becomes frozen, and will not reflect an actual loss of signal
(if one occurs). When the optical facility is placed back in service, the LOS
LED correctly indicates the current state of the optical facility.
—continued—
Then go to
step 4
step 3
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