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Maintenance Object Repair Procedures
555-233-123 10-1690 Issue 4 May 2002
Call State Audit Test (#257)
This test is nondestructive.
This test performs a call state audit on an ISDN B-Channel, and upon successful
completion, guarantees that both sides of the interface are in a consistent call
state for connections using the B-Channel. The test can be helpful when trying to
clear a hung call. If the internal call state data to the near-end switch is different
from that of the far-end switch, the call is torn down.
The test first verifies that the board is physically inserted, gets the current state
from Call Processing, gets the country code, then runs the call state audit.The test
passes if the audit is successful.
The test fails if the board is not inserted, if there is an internal system error, or if a
reply was not received within the prescribed time.
The test aborts if the signaling link is disconnected, the request is already active,
or if the B-Channel is in an Out-Of-Service state.
2100 ABORT Could not allocate the necessary system resources to run this
test.
1. Retry the command at 1-minute intervals a maximum of 5
times.
FAIL Internal system error
1. Retry the command at 1-minute intervals a maximum of 5
times.
PASS Wait 4 minutes and then check the Error Log for any new
errors of type 3073. If there are none, then both sides of the
ISDN connection agree on the service state; the negotiation
succeeded. If there is a new 3073 error, then the negotiation
failed (the far-end switch twice failed to respond within 2
minutes). The switch automatically retries every 15 minutes. If
the trunk was initially in-service, it is now placed in the
maintenance/far-end state. Incoming calls are accepted, but
no outgoing calls can be originated. If an incoming call is
presented, another Service State Audit is immediately
performed in an attempt to put the TN2185 ISDN Trunk-Side
BRI Channel in the proper state.
Table 10-622. TEST #256 Service State Audit Test — Continued
Error
Code Test
Result Description/Recommendation
Continued on next page