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New Member

Can't estabilish calls using g729

I'm trying to establish connection between phones using g729 but unable to do so. g711u codec works just fine. In log I don't see any reason why it shouldn't establish it.

14 REPLIES
New Member

Re: Can't estabilish calls using g729

correct attach

Hall of Fame Super Gold

Re: Can't estabilish calls using g729

Have you configured a codec class with codeg g729 under voice register pool ?

New Member

Re: Can't estabilish calls using g729

yes I do.

voice class codec 1

codec preference 1 g729r8

codec preference 2 g711alaw

codec preference 3 g711ulaw

voice register pool 2

id mac 0000.0000.0000

number 1 dn 2

username XXX password XXX

!

voice register pool 4

id mac 001A.2FA6.F21E

number 1 dn 4

dtmf-relay sip-notify

voice-class codec 1

username XXX password XXX

pool 2 is initiator of connection I've removed voice-call codec to force use only g729

Hall of Fame Super Gold

Re: Can't estabilish calls using g729

You need the voice-class on both. You cannot force use of a codec.

New Member

Re: Can't estabilish calls using g729

This doesn't matter it just select g711u always.

Hall of Fame Super Gold

Re: Can't estabilish calls using g729

In the phones, select g729.

New Member

Re: Can't estabilish calls using g729

This doesn't work either. I even change one phone to cisco7940.

Hall of Fame Super Gold

Re: Can't estabilish calls using g729

On the trace you sent, cause code 65 is bearer capability not implemented, meaning codec mismatch.

Take a trace again with the proper voice-class set on both voice register pool, and send it here with the configuration.

New Member

Re: Can't estabilish calls using g729

Same reason cause=65, its running on: c2800nm-advipservicesk9-mz.124-15.T3.bin

Currently I have some problems with testing because NAT incorrectly translate sip headers(IOS bug), when have two outside interfaces.

I will continue testing on site tomorrow Monday.

New Member

Re: Can't estabilish calls using g729

I choice g729r8 codec alone on voice register pool. And its clear cisco don't like some settings of g729 from my third party phone.

Hall of Fame Super Gold

Re: Can't estabilish calls using g729

voice register pool for called has g729 also ?

New Member

Re: Can't estabilish calls using g729

exactly same.

Hall of Fame Super Gold

Re: Can't estabilish calls using g729

Are both phones registered ok with CME ?

New Member

Re: Can't estabilish calls using g729

yes both phones registered fine, I see no problem in registration when check logs. Tomorrow we will receive bunch of 7911 phones, hope this help isolate problem.

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