AT&T MERLIN LEGEND Release 3.1 Maintenance And Troubleshooting Manual page 192

100D Module Problems
Synchronization. The system maintains proper synchronization to the
loop clock and switches to the local clock when the loop clock is not
available (for example, during a loss of signal or a blue alarm). When
the loop clock source is restored, the system switches back to the loop
clock.
100D Module Error Events
This procedure allows you to check for 100D module errors. If you have any
questions about interpreting these errors, contact your technical support
organization.
Summary
Console Procedure
PC Procedures
To check for Errors, follow the steps below.
Console Display/Instructions
1 From the Maintenance menu, select the Slot option.
_
4–102
Control Unit Problems
Menu
6 2 Type the slot no. 0 8
1 or 2
Additional Information
Dial the slot no.
Current hr or Previous hr
PC
2