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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
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-20
MGW Reachable with Stable Calls, and MGCP Message Successful
Scenario 2 (Special Case)—Reachable RGW with 16 or Fewer Endpoints and No Stable Calls In
Progress
This scenario is applicable to RGWs with 16 or fewer endpoints, but not to TGWs or RGWs with more
than 16 endpoints. (The BTS 10200 always uses
TGWs and reachable RGWs with more than 16 endpoints, regardless of whether there are stable calls or
not.)
Three variations of this scenario are described in this section:
•
•
MGCP Message Sent and Is Unsuccessful
•
MGCP Message Sent and Is Successful
250026
KA 1
KA 2
KA
3
KA 5
KA 6
KA 7
Time
Repeating time intervals with
no MGCP command activity:
mgcp-keepalive-interval
(default = 60 seconds)
Time
KA 4
An MGCP message is sent and
is
s
ucce
ss
ful
(ACK is received).
Repeating time intervals with
no MGCP command activity:
mgcp-keepalive-interval
(default = 60 seconds)
The system restarts
the keepalive timer