Nortel SONET AccessNode User Manual page 149

Procedure 7-17 (continued)
Replacing an NT7E04 DS1/VT mapper
Step
7
.
8
9
AccessNode Modular Business Package VTBM Ring User Guide P0904244 Issue 1.0
Replacing modules in a common-equipment shelf 7-47
Action
Switch service to the protection DS1/VT mapper:
manual op <group>↵
y↵
where
<group> is the group number of the DS1/VT mapper being
replaced.
Service is switched to the protection DS1/VT mapper circuit pack
CAUTION
Loss of service
Leave the DS1/VT mapper, that you performed a
manual protection switch on, in-service while you are
replacing it; otherwise, traffic will be lost.
Remove the ABM shelf cover as shown in Chapter 3, "Removing covers and
grilles."
Pull the circuit pack ejector latches (as shown in Figure 7-14) to remove the
circuit pack from the shelf.
Note: The position of the circuit pack varies with shelf type and configuration.
—continued—