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7-46 Replacing modules in a common-equipment shelf
Procedure 7-17 (continued)
Replacing an NT7E04 DS1/VT mapper
Step
3
4
5
6
AccessNode P0904244 Issue 1.0
Action
At the Network element user interface (NEUI) detailed DS1 protection screen,
ensure that there is no protection switching in effect.
CAUTION
Loss of service
Ensure that there is no protection switching in effect
before locking out the protection DS1/VT mapper.
Lockout of an active protection DS1/VT mapper can result
in loss of service if traffic from the protection DS1/VT
mapper is switched back to an out-of-service working
DS1/VT mapper.
Note: An asterisk (*) under the Forced, Auto or Manual heading indicates
that protection switching is in effect and indicates that the protection DS1/VT
mapper is currently taking over the function of one of the working DS1/VT
mappers (reference the detailed DS1 protection screen in step 1).
Lockout the protection mapper:
lockout op p↵
y↵
When a lockout is operated, the screen displays an asterisk (*) in the
Lockout column.
Display the equipment screen for the circuit pack to be replaced:
eq ds1 < group >↵
Where < group > is the group number of the DS1/VT mapper being replaced.
Slot and group number of a DS1 mapper in an ABM shelf:
1
2
3
G1
G2
P
The DS1 equipment screen appears.
Change the state of the circuit pack to out-of-service (OOS):
chgstate oos↵
y↵
The state changes to OOS.
Skip to step 8.
—continued—
4
5
6
G4
G5
G6
7
8
G7
G8
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