[cisco-nas] Problem with VoIP codes on 2600

['Clayton Kossmeyer']

Hi Tomaz -

On the POTS side you can only change the compand-type to be either
a-law or u-law (g.711).  Bear in mind, this is not really changing the
codec on the telephony side.  It's just telling the router how to
interpret the PCM data in the bearer channels from the telephony
switch.

There really isn't the concept of a codec, per se, on the telephony
side.

Regards,

Clay

On Wed, Aug 13, 2003 at 03:56:27PM +0200, Aljaz Tomaz ITWEG wrote:
> Hi Clayton,
> Thanks for you valuable information (it helped). From my perspective it seem
> that 2600 accepts on POTS dial-peer any available codec, it is only possible
> to configure codec preferences on VOIP dial-peer. Are there any
> possibilities to limit available codecs on POTS dial-peer (just G.729).
> 
> Best regards, 
> Tomaz
> 
> -----Original Message-----
> From: Clayton Kossmeyer [mailto:ckossmey at cisco.com]
> Sent: Wednesday, August 13, 2003 3:39 PM
> To: Aljaz Tomaz ITWEG
> Cc: 'cisco-nas at puck.nether.net'
> Subject: Re: [cisco-nas] Problem with VoIP codes on 2600
> 
> 
> 
> Hi Tomaz -
> 
> It sounds like what you want to do is configure "voice-class codec" to
> create a list of codecs you want to support on the VoIP dial-peer
> Also, if this is using an NM-HDV, you can configure the codec
> complexity for the module to be either "medium" or "high".
> 
> Configuring for high complexity will cause the router to use g729; if
> configured for medium complexity it will use g729a.  You can configure
> the HDV module like this:
> 
> voice-card <slot>
>  codec complexity [medium | high]
> 
> Here's a sample codec-class configuration:
> 
> voice-class codec 1
>  codec preference 1 g729r8
>  codec preference 2 g711ulaw
> 
> then, apply it to the dial-peer:
> 
> dial-peer voice <x> voip
>  voice-class codec 1
> 
> Regards,
> 
> Clay
> 
> On Wed, Aug 13, 2003 at 08:13:38AM +0200, Aljaz Tomaz ITWEG wrote:
> > Hi!
> > We have equipment that we test interworking with Cisco 2600. We have
> > following problem with G.729.
> > When 2600 is receiving the calls from other box over g729A everything's
> work
> > fine.
> > When Cisco initiate the call it uses codec g729 without annex A. Receiving
> > site do not support this codec so it recommend g.729A or g.711a. Cisco
> > decided to use g.711a. Why???
> > How can I influence on POTS dial-peer to use just one (or more) codec(s),
> > based on preference.
> > 
> > Kind regards,
> > Tomaz
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