AT&T MERLIN LEGEND Communications System Release 2.0 Maintenance And Troubleshooting Manual page 118

Control Unit Problems
Step
3
Slot xx:
Make a selection
Status
Busy-Out
Restore
Exit
I
4
Busy-Out Slot xx:
Yes
Cancel
Exit
5
Busy-Out Slot xx:
Busy-Out in Progress
Exit
4-28
Module Problems
Display
Demand Test
Reset
Instructions
Select Busy-out.
For all MLX modules, BchLoopback is also
displayed as an option on this screen.
For 100D modules, CSU–lpbk, Error
Events, and Clock are also displayed as
options on this screen.
Select Yes.
This screen appears while the module is
discontinuing service to lines/trunks and
extensions—without disrupting calls in
progress.