call of CUCM to the router voice FXS thanks CUBE problem

Hello

We had a problem in our test environment:

- - - - Analog telephone

When we on the g711 codec, both directions of appeal are ok.

When we put the codec for g729r8, appeal from analog to IP has no problem. But for reverse, the analog phone can ring but will be disconnected after a few seconds. Before the call is disconnected, we find that the codec is "pre-ietf g729" using the command 'show call active voice brief' on the CUBE.

The configuration of the CUBE and Router (FXS) voice is attached. Really appreciate your advice.

Thank you!

Eric

It seems that the analog phone only supports pre - itf g729 format...

Unfortunately this codec format is no longer supported on any ios...

http://www.Cisco.com/c/en/us/support/docs/voice/h323/14069-codec-complexity.html#pre_ietf

You can try your luck and see if this pre - itf is available on ios, but I doubt it. You will need to have them on all your dial peers.

 maui-vgw-01(config)#dial-peer voice 100 voip maui-vgw-01(config-dial-peer)#codec g729r8 pre-ietf 

The pre-ietf in this command option is not supported in Cisco IOS release 12.2 and later.

Tags: Cisco Support

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