FXO calls dropping on MGCP gateway

[Mitchel Erb]

Have a MGCP site with two FXO ports for connection out to the PSTN.  I keep dropping calls, the VoIP phone shows "temp fail" when it drops and I'm having trouble deciphering the debugs.  I think there is a timer somewhere in the config just not sure where to look.  See attachments for show run / ccapi debugs / mgcp debug.  ccapi and mgcp debugs are from two different calls but on the same port and were placed one after the other.  Also I cut the MGCP debug to right before the disconnect.

Originally the drops were happening at intermittent times, I added a few lines tonight and I had 3 straight calls last for 12 minutes before dropping.

lines added:

(config-gateway)# no timer receive-rtp 1200

(config-gateway)# no media-inactivity-criteria all

and

"no vad" to the voice ports last night

Any help is much appreciated.

[acampbell]

Hi,

I think you need to look at your MGCP config on the router.

You have

mgcp bind control source-interface FastEthernet0/0

mgcp bind media source-interface FastEthernet0/0

However int f0/0 is shut.

The config you have shown is incomplete but

I think your voip is using VLAN 200 on the 10.200.60.0/24 subnet

Try reconfiguring the mgcp

!

mgcp bind control source-interface vlan 200

mgcp bind media source-interface vlan 200

!

exit

!

wr mem

!

conf t

!

no mgcp

mgcp

!

exit

Regards,
Alex.
Please rate useful posts.

[Mitchel Erb]

Oiy, yes that would help. I'll give it a try and report back in a day or two. Thanks.

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[Mitchel Erb]

Had a co-worker apply this change today, then placed a test call, it dropped at about the 4 minute mark. This site is running back on a VPN connection thru a SonicWall...if that helps.

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