Avaya DEFINITY Server CSI Maintenance Manual page 1531

PRI-CDR/SEC-CDR (PRI-CDR Link)
The following physical configurations are supported for the CDR link:
From the EIA port of Processor circuit pack to an CDR output device
through the standard EIA-232C interface.
From a data channel on the TN2402/TN798 Processor circuit pack to a
data extension where the CDR output device connects via the standard
EIA 232C interface.
The data extension can be a PDM, MPDM, DTDM, or ADU. The PDM,
MPDM, and DTDM connect to a Digital Line Port of TN754 or TN754B
Digital Line circuit pack; ADU connects to a Data Line Port of TN726 Data
Link circuit pack.
CDR Link Maintenance does not cover the maintenance of the elements
composing the CDR physical link, which are as follows:
External CDR output device
EIA port on Processor circuit pack
Data Module (PDM/MPDM/DTDM) and Digital Line Port of TN754 or
TN754B Digital Line circuit pack
ADU and Data Line Port of TN726 Data Link circuit pack
Data Channels on the TN2402/TN798 Processor circuit pack
If CDR Link Maintenance cannot restore the CDR link, then the maintenance tests
of these individual components of the CDR link must be executed to diagnose
faults.
555-233-119
NOTE:
In duplicated systems it is possible for a failure on one of the
processor circuit packs to bring down the CDR link even if it is the
standby processor. This problem can not be resolved by
interchanging processors because the CDR ports on each of the
processor circuit packs are connected via WIRE-OR.
Issue 5 October 2002
1531