Avaya 03-300430 User Manual

The CDR feature records detailed call information about every incoming and outgoing call on 
specified trunk groups and sends this information to a CDR output device. The two physical 
links can be administered for connecting external CDR output devices to the system. They are 
identified as the primary CDR (PRI-CDR) link and the secondary CDR (SEC-CDR) link. The 
CDR device connects to the system via a data module (PDM, MPDM, DTDM) connected to a 
port on a TN754 Digital Line circuit pack that is administered as a data extension. A CDR device 
can also be connected through an ADU to a port on TN726B. The CDR link to the processor is 
through a C-LAN board. For information about C-LAN port connectivity, see 

on page 789. External CDR output devices include:

●

94A Local Storage Unit (LSU)

●

TELESEER CDR Unit

●

Call Accounting System (CAS)

●

Call Detail Recording Unit (CDRU)

●

Printer

●

Host computer

●

Personal computer (PC)

●

Customer-provided equipment

CDR Link Maintenance provides a strategy for maintaining the link between the system and an 
external CDR output device. The strategy includes a set of tests for periodic diagnosis, 
detection of errors during normal operation, actions for troubleshooting, and raising alarms for 
serious problems. CDR Link Maintenance uses a try-and-wait mechanism for maintaining the 
CDR link. If the CDR link is torn down due to an error, CDR Link Maintenance tries to bring the 
CDR link up. If the Link Setup fails, CDR Link Maintenance will wait for 30 seconds before the 
next retry. If the number of retries reaches a threshold (two), a Minor alarm is raised for service 
attention.

PRI-CDR/SEC-CDR

MIN

secondary l

CDR Link

PRI-CDR/SEC-CDR

WRN

CDR Link