408 NT6D80 MSDL card
Sample
2AML 3RS-232
DCE NTND27AB
3Spare RS-232
MaintenanceRoutinemaintenance consists of enabling and disabling MSDL cards and
downloading new versions of peripheral software. These activities are
performed by an authorized person such as a system administrator.
Troubleshootingthe MSDL consists of determining problem types, isolating
problem sources, and solving the problem. A craftsperson normally
performs these activities.
CS 1000E, CS 1000M, and Meridian 1 systems have self-diagnostic
indicators as well as software and hardware tools. These diagnostic
facilities simplify MSDL troubleshooting and reduce mean-time-to-repair
(MTTR). For complete information concerning system maintenance, refer to
Communication Server 1000M and Meridian 1 Large System Maintenance
(NN43021-700).
For complete information regarding software maintenance programs, refer
to Software Input/Output Reference — Administration (NN43001-611).

MSDL states

MSDL states are controlled manually by maintenance programs or
automatically by the system. Figure 106 "MSDL states" (page 409) shows
MSDL states and the transitions among them. These are the three states
the MSDL may be in:
•Manually disabled
•Enabled
•System disabled
The following sections describe the relationships between these states.

Manually disabled

In this state, the MSDL is not active. The system does not attempt to
communicate or attempt any automatic maintenance on the MSDL.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Copyright© 2003-2008, Nor tel Networks
.