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ISDN-SGR (ISDN-PRI Signaling Group)
Issue 1 June 2005 1431
Notes:
a. Error Type 0: Run the short test sequence first. If every test passes, run the long test
sequence. Refer to each appropriate test’s description, and follow its recommended
procedures.
b. Error Type 1: this switch sent a message to the far-end switch or terminal adapter, and the
far end did not respond in the allotted time. Possible causes include link failure and
congestion or outage at the far end. The Aux Data field contains layer-3 protocol information
used by internal counters.
If no other symptoms are present, no action is required. If layer-3 communication is down,
there should be indications in the screen of alarms and errors for link components. Check
for other errors against ISDN-SGR, ISDN-TRK, and other hardware components on the link.
There is no test to clear these errors. The error counter is decremented by 1 every 15
minutes.
c. Error Type 257: the primary signaling channel connection has been lost for more than 90
seconds. If a secondary signaling channel does not exist or is not in service, the associated
B channels will be placed in the ISDN Maintenance/Far-End state. The B channels will not
be usable for outgoing calls, although incoming calls will still be accepted. The switch will
automatically attempt to recover the signaling link. Pay particular attention to the results of
Test #636 (Primary Signaling Link Hardware Check) in the test sequence. When the link
769 Any Primary Signaling
Link Hardware
Check (#636)
test signaling-group grp#
1025 Any Secondary
Signaling Link
Hardware Check
(#639)
test signaling-group grp#
1793 (e
) Any Layer 2 Status
Test (#647)
WRN OFF test signaling-group grp#
2049 (f
) Any Layer 2 Status
Test (#647)
WRN OFF test signaling-group grp#
2305 (g
) Any Remote Layer 3
Query (#637)
MIN OFF test signaling-group grp#
3585 (h
)
Port
number
None
3842 –
3942 (i
)
Port
number
None
Table 514: ISDN-PRI Signaling Group Error Log Entries (continued)
Error
Type
Aux
Data
Associated Test Alarm
Level
On/Off
Board
Test to Clear Value
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