Demand test descriptions and error codes - Avaya Support

CDR Link Maintenance does not cover the maintenance of the elements composing the CDR
physical link:
● External CDR output device
● Data Module (PDM/MPDM/DTDM) and Digital Line Port of TN754 Digital Line circuit pack
● ADU and Data Line Port of TN726B Data Line circuit pack
If CDR Link Maintenance cannot restore the CDR link, the maintenance tests of these individual
components of the CDR link must be executed to diagnose faults.
Procedures for Restoring the CDR Link
1. Determine the status of CDR links.
Enter status cdr-link and make sure that the CDR links are not busied out for
maintenance. If the link is down, continue to the next step.
2. Where does the CDR link connect to?
Enter display system-parameters features and find out the destinations of CDR
links. Continue to the next step.
3. Enter status data extension and verify whether the data extension is in the
in-service/idle state. If the data extension is not available, look for the extension number in
the Alt Name field of the Error Log and see XXX-BD (Common Port Circuit Pack/Media
Module) for resolutions.
4. Is the external CDR output device available?
Make sure that the CDR output device is on-line and ready for service. Check the physical
connectivity between Data Module and the CDR output device.
5. If the problem is not found in the above steps, check the C-LAN board for any problems.
For description about system port and its connectivity, see CLAN-BD (Control LAN Circuit
Pack).
When restoring the CDR link it is necessary to execute maintenance test on different objects
that comprise the CDR link. It is recommended that you busyout the CDR link before trying to
restore the link. When the CDR Link is busied out, then every CDR Link maintenance action is
deactivated, and interference to tests of other MOs is prevented.
788 Maintenance Alarms for Communication Manager, Media Gateways and Servers