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ISDN-TRK (DS1 ISDN Trunk)
Issue 5 October 2002
1305
555-233-119
Figure 36.
ISDN-PRI Signaling Link Port Interactions (32-Channel - TN464)
For interfaces using country protocol 1 on the DS1 Circuit Pack administration
form (including US), the signaling protocol used for the maintenance of the
B-channel is defined by the ISDN-PRI Specification.
For interfaces using country protocols other than 1, the signaling protocol used for
the maintenance of the B-channel is defined by the CCITT ISDN-PRI
Specification.
There are five possible Service States for a B-channel. The service state is
negotiated with the far-end switch, changes over time, and may have a far-end or
near-end component. The service state is initialized to Out-Of-Service/Far-End
state and an attempt is made to negotiate it to In-Service.
NOTE:
The service state of a particular DS1 ISDN Trunk B-channel can be
displayed by issuing the status trunk <trunk_group/trunk_member>
system technician command.
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. TN464C or higher
Processor
(TN798)
UDS1
Interface
circuit pack
TN464
T
D
M
b
u
s
2
(Port 0)
(Port 15)
(Port 16)
Pimary
signaling link
Voice or data
(Port 1)
Voice or data
(Port 17)
Voice or data
(Port 31)
Framing
ISDN -TRK
(B-Channel)
ISDN -TRK
(B-Channel)
ISDN -TRK
(B-Channel)
ISDN -TRK
(B-Channel)
ISDN -PLK
(D-Channel)
cydfisd2 RPY 061297
Slot 1
Содержание DEFINITY Server CSI
Страница 1: ...Maintenance for Avaya DEFINITY Server CSI Volumes 1 and 2 Release 1 2 555 233 119 Issue 5 October 2002...
Страница 6: ......
Страница 20: ...Contents 555 233 119 20 Issue 5 October 2002...
Страница 30: ...About this Book 555 233 119 30 Issue 5 October 2002...
Страница 944: ...Maintenance Objects 555 233 119 944 Issue 5 October 2002...
Страница 1397: ...MMI BD Issue 5 October 2002 1397 555 233 119 Figure 44 TN787 Multimedia Interface MMI Circuit Pack...
Страница 1409: ...MMI PT Issue 5 October 2002 1409 555 233 119 Figure 45 TN787 Multimedia Interface MMI Circuit Pack...
Страница 1891: ...VC DSPPT Issue 5 October 2002 1891 555 233 119 Figure 63 VC Circuit Pack DSP Port Local TDM Loopback Test...
Страница 1902: ...Maintenance Objects 1902 Issue 5 October 2002 Figure 65 VC Circuit Pack Summer Port Loopback Test...