Scenario 3—Mgw Unreachable - Cisco BTS 10200 Troubleshooting Manual

Appendix B System Usage of MGW Keepalive Parameters, Release 5.0
MGCP Message Sent and Is Successful
If the BTS 10200 sends an MGCP message to the MGW, and the message is successful (an ACK is
received), the system restarts the keepalive timer. This condition is shown in
Figure B-23 MGW Reachable with No Stable Calls, and MGCP Message Successful
KA 1 KA 2
x 2x
x
x = provisioned value of
mgcp-keepalive-interval
(default = 60 seconds)
Scenario 3—MGW Unreachable
This scenario applies to residential gateways (RGWs) and trunking gateways (TGWs). The following
conditions are described:
•
•
•
OL-8723-19
An MGCP message is sent and
is successful (ACK is received).
KA 3
4x
The system restarts
the keepalive timer
KA 4
x 2x
KA Attempts Unsuccessful, MGW Unreachable, and Stable Call Is Present
KA Attempts Unsuccessful, MGW Unreachable, and No Stable Calls Present
MGW Unreachable, New Call Termination Attempt Occurs
Keepalive for Release 5.0 Maintenance Release 1.1 and Later
KA 5 KA 6
4x
8x
Cisco BTS 10200 Softswitch Troubleshooting Guide, Release 5.0.x
Figure B-23.
Time
KA 7
Time
B-31