Cisco BTS 10200 Troubleshooting Manual page 826

Keepalive for Release 5.0 Prior to Maintenance Release 1.1
MGW Unreachable, New Call Termination Attempt Occurs
If the MGW is in down status, and a new call termination attempt is made on any termination on that
MGW, the KA process is expedited even though the next keepalive attempt is scheduled for a later time.
If the MGW is still in down status, the KA attempts continue. This condition is shown in
In this case, the BTS 10200 fails the call immediately after receiving the call termination attempt,
Note
without sending any MGCP message to the MGW.
Figure B-13 MGW Unreachable, New Call Termination Attempt Occurs
KA attempts,
all unsuccessful
KA 1-1 KA 1-2
10
seconds
Time interval with
no MGCP messages
Cisco BTS 10200 Softswitch Troubleshooting Guide, Release 5.0.x
B-18
KA 1-3
20 40
seconds seconds
KA 2-1
Appendix B System Usage of MGW Keepalive Parameters, Release 5.0
New call termination attempt
KA attempts
all unsuccessful
(continuing)
KA 2-2 KA 2-3
10 20
seconds seconds seconds
KA 2-4
40 60
seconds
Figure B-13.
Time
KA 2-5
Time
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