PRI-CDR/SEC-CDR (Call Detail Recording Link)
Issue 1 May 2002
8-1327555-233-143
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 command and make sure that the CDR links are not
busied out for maintenance. If the link is down, then continue to the next
step.
2. Where does the CDR link connect to?
Enter display system feature and find out the destinations of CDR links.
Continue to the next step.
3. Enter the status data extension command and verify whether the data
extension is in the in-service/idle state. If the data extension is not
available, then look for the extension number in the Alt Name field of the
Hardware Error Log and see ‘‘XXX-BD (Common Port Circuit Pack)’’ on
page 8-1872 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)’’ on page 8-411.
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.
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