Calls get disconnected when on hold or during transfer

[pambosch]

We have a Call Manager 3.1(3a) with an H323 IOS gateway (2610 router with NM-HDV-E1 voice PRI card). We have a pilot number which is answered by an attendant. The attendant complains sometimes that when she tries to transfer a call or when a call is on hold, the line disconnects. This happens with incoming calls from the PSTN. I suspect that the problem is on the H323 gateway because before we had an old Skinny DE30+ PRI card which worked great with no problems like that.

Any hints on this??

Thank you very much

[oksiazek]

Hi ,

I have had this problem also with an AS5300 . I think that your problem is a codec problem in the dial-peer voice voip .

You don't use the correct codec !!!

Where are come from ??? and wich codec are you using ????

Thanks

Olivier

[pambosch]

Thanks for the help. I'm using G711ulaw on the VOIP dial-peer. I will use a voice class codec and put also g729r8 to see what happens.

Thanks a lot.

[mimckee]

If you do beleive it is a codec problem do a voice class codec and add g.711 and g.729r8. That should rule out any codec issues. Also make sure if you have a cluster that your dial-peers session targets match up with the callmanager group you have configure for the device pool of the gateway.

Hope this helps,

-Mckee