DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
Alarms, Errors, and Troubleshooting

5-71Troubleshooting ISDN-BRI/ASAI Problems

5
Troubleshooting ISDN-BRI/ASAI Problems

Troubleshooting ISDN-BRI/ASAI problems can be a comp lex and involved

procedure. The reason for this is that ISDN-BRI devices c ommunicate with the

SPE over the Packet Bus, as opposed to the TDM Bus. Therefore, it is possible

for failures of other Packet Bus-related system comp onents to cause prob lems

with ISDN-BRI devices. Figure 5-40 shows the connectivity of the Pac ket Bus as

it applies to ISDN-BRI signaling.

Figure 5-40. ISDN-BRI/Packet Bus Connectivity

Signaling Links
T
N
7
T
N
7
Testing/
Reconfig
T
N
7
7
Signaling
Links
EPN
Duplicated
PNC
Only
Packet Bus
BRI-PT ABRI-PT
ASAI-ADJ
T
N
5
0 1
5
0
5
5
6
T
N
7
ABRI-PT
T
N
Duplicated
PNC
Only
T
N
7
Packet Bus
Signaling
Links
BRI-PT
T
N
1
6
5
5Testing/
Reconfig
T
N
1
6
5
5
T
N
7
7
PPN
ASAI-ADJ
1
5
5
6
5
0
5
0