Avaya S8700 Maintenance Manual page 207

PE-BCHL (PRI Endpoint Port)
A PRI endpoint port is a port on a UDS1 interface circuit pack and thus depends
on the health of the circuit pack for proper operation (see the following figure). A
problem on the associated ISDN-LNK's (ISDN-PRI signaling-link port's) D channel
can also affect the PRI endpoint. In turn, the ISDN-LNK depends on the
SYS-LINK (system link) to the packet interface. Keep this hierarchy of
dependencies in mind when diagnosing problems.
ISDN-LNK
Terminal
Adapter
PE-BCHL
PE-BCHL
Figure 8-35. PRI Endpoint Port Interactions
PRI Endpoint Port Service States
The status pri-endpoint extension command displays the following possible
service states for PRI endpoint ports. The table that follows gives recommended
procedures for each state. The figure following that shows typical progressions
from one service state to another. Refer also to Troubleshooting Wideband
Problems in
approach to addressing PRI endpoint problems.
In-Service (INS)
The B channel is in its normal operating state.
555-233-142
Signaling
(Port 24)
Data
(Port 23)
. . .
. .
.
. .
. . .
. .
.
. . . .
. . . .
. . .
.
. .
Data
(Port 1)
Chapter 4, ''Alarms, Errors, and Troubleshooting''
Packet
Bus
PKTINT
Circuit
UDS1
Interface (TN1655)
Circuit
Pack
(TN464C)
MSSNET
Circuit
(UN332)
TDM
Bus
Issue 1 May 2002
Pack
Processor
(UN331)
Pack
for a layered
8-903