Avaya DEFINITY Server CSI Maintenance Manual page 1283

ISDN-PLK (ISDN-PRI Signaling Link Port)
Slot 1
Processor
(TN798)
Figure Notes:
1. B- and D-channel messages are
routed over the TDM Bus. For
additional reliability, a duplex
D-channel can be administered for
a signaling group and located on a
different TN464C (or higher) circuit
pack.
Figure 32. ISDN-PRI Signaling Link Port Interactions (24 Channel -
ISDN-PLK handles maintenance and recovery for the D-channel port on the DS1
carrying the signaling link. A problem with the ISDN-PRI Signaling Link Port
(D-channel) has an effect on all of the associated DS1 ISDN Trunks or PRI
endpoint ports (B-channels) since no call control information can be conveyed to
the far-end switch or Terminal Adapter without it. Stable calls may remain
operational, but no new calls can be made.
If there are problems with the ISDN-PLK, also investigate the TN464 UDS1
interface circuit pack (UDS1-BD).
555-233-119
T
D
M
b
u
s
TN767/464C)
DS1
Interface
Voice or data
circuit pack
(Port 1)
TN767
2
Voice or data
(Port 23)
Pimary
signaling link
(Port 24)
2. TN767B (or higher) or TN464C (or
higher)
Issue 5 October 2002
ISDN -TRK
(B-Channel)
ISDN -TRK
(B-Channel)
ISDN -PLK
(D-Channel)
cydfisd3 RPY 061297
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