ccme and h.323 voip trunks

[bphelps]

Is there any design problem with running a few voip h.323 trunks from ccme to an h.323 gateway? The gateway would be a 1760 with some fxo ports to the pstn.

[Aaron Harrison]

I shouldn't thinks so - just a matter of properly configuring your dial-peers etc...

[bphelps]

Inbound/outbound calls work great, however, when I've got a call terminated and the voice path is pstn->1760gateway->2610ccme->ipphone when I transfer call to voicemail, it rings busy. If a call comes in on the second gateway and rolls to vm, it rings busy. Any sip dialpeer stuff that I should have?

[Aaron Harrison]

Hi

This could be because VM requires G711, whereas G729 is default codec for voip dial-peers...

Try changing the dial-peers to :

codec g711ulaw

If this works, you have a couple of options:

1) If you have DSPs on your CME router spare, and have CME 3.2, I believe you can transcode for CUE sessions..

2) Set up a voice class codec with preference listed codecs, then apply it to your dial-peers:

Router#conf term

Router(config)#voice class codec 99

Router(config-class)#codec preference 1 g711ulaw

Router(config-class)#codec preference 2 g729br8

Router(config-class)#codec preference 3 g729r8

Router(config-class)#end

Router(config)#dial-peer voice 2000 voip

Router(config-dial-peer)#voice-class codec

Hope this helps...

Aaron