555-233-119
1304
Issue 5 October 2002
Figure 35.
DS1 ISDN Trunk Interactions (24 Channel - TN767/464C)
On 32 channel interfaces, any of ports 1-15 and 17-31 on the DS1 interface circuit
pack can be a B-channel. The 16th port may be used as a B-channel or as a
D-channel depending on the type of ISDN-PRI Signaling Group (ISDN-SGR) to
which it belongs. For more details, refer to the ISDN-SGR and DS1-BD/UDS1-BD
Maintenance documentation.
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.
2. TN767B (or higher) for DS1;
TN464C (or higher) for UDS1
Processor
(TN798)
Slot 1
DS1
Interface
circuit pack
TN767
T
D
M
b
u
s
2
(Port 24)
Pimary
signaling link
Voice or data
(Port 1)
Voice or data
(Port 23)
ISDN -TRK
(B-Channel)
ISDN -TRK
(B-Channel)
ISDN -PLK
(D-Channel)
cydfisd3 RPY 061297