Nortel SONET AccessNode User Manual page 137

Procedure 7-15 (continued)
Replacing an NT4K75 timing and cross-connect
Step
3
4
5
6
7
8
AccessNode Modular Business Package VTBM Ring User Guide P0904244 Issue 1.0
Replacing modules in a common-equipment shelf 7-35
Action
Switch service to the other TXC:
forced op <group>↵
where
<group>
When a forced switch is operated, the screen displays an asterisk (*) in the
Forced column. The banner line is updated under the ActProt column,
and a "Forced switch request" alarm is raised.
Display the TXC equipment screen:
eq txc <group>↵
where
<group>
The TXC equipment screen appears.
Change the state of the TXC card being replaced, to out-of-service (OOS):
chgstate oos↵
y↵
Remove the ABM shelf cover as shown in Chapter 3, "Removing covers and
grilles."
Pull the TXC card ejector latches to remove the TXC card from the shelf.
Note: Wait at least 5 seconds before installing the replacement card.
Insert the replacement TXC card into the shelf as follows:
a. Gently push the replacement TXC card into the shelf slot until the ejector
latches come in contact with the front of the shelf.
b. Push the latches in toward the circuit pack to engage the circuit pack with
the backplane.
—continued—
is the number of the TXC being replaced:
g1 (slot 9) or g2 (slot 10).
is the number of the TXC being replaced:
g1 (slot 9) or g2 (slot 10).