Maintenance Object Repair Procedures
555-233-123
10-982 Issue 4 May 2002
Figure 10-59. Common Progressions in Service States
ISDN-PRI Trunk Service States
The following chart summarizes each of the different DS1 ISDN Trunk service
states that can result when the status trunk <trunk_group/trunk_member>
command is issued.
NOTE:
Refer to Chapter 5, ‘‘Routine Maintenance Procedures’’ for a layered
approach to the processing of ISDN-PRI problems.
Craft busyout of B-channel
(TRK-GRP/MBR), or problem
with near en d PI-LINK, DS1-BD,
PI-BD, or port.
long test of the trunk.
Craft busyout of signaling link
busyout link LINK-NO or
transient state for demand
link, or craft
demanded test
completed.
of signaling
Craft release
If D-channel
controlling the
B-channel is
up, send a
message
requesting
transition to
In-Service.
least 90 seconds,
or Remote Level 3
Query failed.
been down for at
D-channel has
Maintenance
Near End
Maintenance
Far End
Pending
In-Service
Maintenance
Far End
Craft release of
B-channel or
clearing of near-end
problem with
DS1-BD, PI-BD,
PI-LINK or port.
Out-of-
Service
Far End
Out-of-
Service
Far End
Pending
In-Service
Out-of-
Service
Near End
Administer
B-channel
as member
of a trunk
group.
If D-channel control-
ling the B-channel is
up, send a message
requesting transition
to In-Service.
Failed to receive
reply from far
end. MTCE will
periodically try
to resend the
message.
Received
acknowledgement
or other
indication from the
far end that
B-channel is in service.
or other indication
from the far end,
that B-channel is
inservice.
acknowledgement
Received
message. [Country
protocol 1]
try to resend the
MTCE will periodically
reply from far end.
Failed to receive
in service.
B-channel in/not
from far end that
Received indication
message. [country
protocol other than 1]
try to resend the
MTCE will periodically
reply from far end.
Failed to receive
In-Service
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