Avaya CS 1000 Maintenance Manual page 22

PRI fault clearing
Step
PLOG DCH N
6 Check the DCHI-to-PRI cable.
7 Check DCHI card jumper settings.
8 Check to see that one system is designated
as "master" (usually the larger system), and
the other as "slave."
22 ISDN Primary Rate Interface Maintenance
Action
Comments? infodev@avaya.com
Response
November 2011