Avaya S8700 - Troubleshooting ISDN-BRI; ASAI

Troubleshooting ISDN-BRI / ASAI
Issue 1 May 2002
4-73555-233-143
Troubleshooting ISDN-BRI / ASAI
Troubleshooting ISDN-BRI/ASAI problems can be a complex and involved
procedure. The reason for this is that ISDN-BRI devices communicate with the
server over the packet bus, as opposed to the TDM bus. Therefore, it is possible
for another component’s fault (related to the packet bus) to cause problems with
ISDN-BRI devices. Figure 4-40 shows the connectivity of the packet bus as it
applies to ISDN-BRI signaling.
Figure 4-40. ISDN-BRI/Packet-Bus Connectivity
The flowchart in Figure 4-41 on page 4-75 describes the steps needed to isolate
and resolve an ISDN-BRI problem. The order of examining maintenance objects
(MOs) can be determined by assessing how wide-spread the failure is. For
example, since every ISDN-BRI device in the scope of an IPSI-connected EPN
communicates with the TN2312 IPSI circuit pack’s Packet Interface circuit, its MO
should be examined early in the sequence. On the other hand, a failure of an
EPN’s TN570 EI circuit pack may cause an ISDN-BRI failure in one EPN, but not
in another.
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
5
Testing/
Reconfig
T
N
1
6
5
5
T
N
7
7
PPN
ASAI-ADJ
1
5
5
6
5
0
5
0