[cisco-voip] sip trunk to asterisk

[s m]

hello guys,

thank you for your answers. i have a voice class codec and assign it to
both dial-peers. cisco receives calls with g711alaw codec and must
transcode it to g711ulaw because the freepbx which cisco is connected to in
the other side, supports just g711ulaw codec. my question is: can cisco
2800 transcode these codecs? if yes, is it enabled by default or should i
enable it by configuring "dspfarm profile"?

thanks you,
SAM

On Thu, Apr 2, 2015 at 3:06 PM, <Zoltan.Kelemen at emerson.com> wrote:

>  Hi Sam,
>
>
>
> Do you need to transcode on the Cisco? (i.e. aren’t both endpoints
> supporting the same set of codecs?)
>
> You need to ensure, that if you use a codec list on one call-leg
> (dial-peer) you support the same on the other call-leg (or outbound
> dial-peer) as well.
>
> Trying transparent codec on dial-peers may also work.
>
>
>
> For transcoding you’ll need DSCP resources and some configuration:
>
> http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/voice/cube/configuration/cube-book/transcoding.html
>
>
>
> Cheers,
>
>
>
> *Zoltan Kelemen*
> Emerson
>
>
>
> *From:* cisco-voip [mailto:cisco-voip-bounces at puck.nether.net] *On Behalf
> Of *s m
> *Sent:* 02 April 2015 12:08
> *To:* cisco-voip at puck.nether.net
> *Subject:* [cisco-voip] sip trunk to asterisk
>
>
>
> hello everybody,
>
> i want to configure a sip trunk between a cisco router and my system which
> has asterisk. this is my scenario:
>
> Freepbx-----my system-----cisco-router----Freepbx
>
> my system acts like a router. in cisco, if i set just one codec in
> dial-peers, every thing is ok and i can make a call. but if i set different
> codecs in a voice class codec and assign it to dial-peers, i can make call
> but call is terminated.
>
> i trace all debug messages in cisco and think it is happened when
> receiving call has a codec which differs with first codec priority in cisco
> router because my cisco router can not transcode these codecs to each
> other. am i right or misunderstand?? if it is true, how can i enable
> transcoding on my cisco router?  i have a 2800 router.
>
> any comments ot hints are really appreciated.
>
> SAM
>
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