DEFINITY ECS Release 8.2 Maintenance for R8.2csi
555-233-119 Issue 1
April 2000
Maintenance Objects
3-735ISDN-TRK (DS1 ISDN Trunk)
3
Figure 3-26. 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 Lucent 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.
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
Voi ce or d at a
(Port 1)
Voi ce or d at a
(Port 17)
Voi ce or d at a
(Port 31)
Framing
ISDN -TRK
(B-Channel)
ISDN -TRK
(B-Channel)
ISDN -TRK
(B-Channel)
ISDN -TRK
(B-Channel)
ISDN-PLK
(D-Channel)
c
y
dfisd2 RPY 06129
7
Slot 1