AT&T MERLIN LEGEND Release 3.0 Installation Manual page 415

Module Problems
Restoring automatically undoes the Busy-out and Reset. For additional
information on restoring a module, see "Restore," later in this chapter.
Persistent Module Problems
If any of the module tests fail and replacing the module does not clear the
trouble, then:
Several modules may be faulty.
The connector on the carrier may be faulty.
Busy-Out and Reset
Before running any module test, be sure to busy-out or reset the module.
Busy-out discontinues service from the module being tested to each
line and extension only as they become idle. Busy-out is the preferred
method, because it does not disrupt calls in progress.
Reset discontinues service to all lines and extensions on the module
instantly.
— In-progress calls are dropped if all of the calling parties on the call
originate and terminate on the module being reset.
— If a call is using a line or extension on the module being Reset and
another line and/or extension is involved in the call, the call on the
module being reset is put on hold. In this case, the module can be
removed and replaced. However, a demand test cannot be
performed, because the module is not busied-out.
Check the status of the reset module before performing a demand
test.
Menu → Maintenance → Slot → Status
Once you finish testing a module, you must restore it. Restoring a module
terminates the Busy-out or Reset condition, See "Restore," later in this
chapter, for instructions.
Control Unit Problems 4-37