B-35
Cisco BTS 10200 Softswitch Troubleshooting Guide, Release 5.0.x
OL-8723-19
Appendix B System Usage of MGW Keepalive Parameters, Release 5.0
Keepalive for Release 5.0 Maintenance Release 1.1 and Later
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
.
Note
In this case, the BTS 10200 fails the call immediately after receiving the call termination attempt,
without sending any MGCP message to the MGW.
Figure B-26
MGW Unreachable, New Call Termination Attempt Occurs
2500
3
2
KA 1-1
KA 1-2
KA 1-
3
Time
KA attempts,
all unsuccessful
10
seconds
40
seconds
20
seconds
KA attempts
all unsuccessful
(continuing)
Time interval with
no MGCP messages
New call termination attempt
KA 2-1
KA 2-2
KA 2-
3
KA 2-4
Time
10
seconds
40
seconds
20
seconds
KA 2-5
60
seconds
