asterisk users - Apr 2007 - Unable to find a codec translation path from ilbc to ulaw

Hi!

As the upstream of my DSL-connection is very slow, I'd like my
sip-phones to use iLBC to connect to my *. My gateway provider only
allows ulaw. Hence, I'd like to use the follwing setup:

SIP-phone <--iLBC--> Asterisk <---ulaw----> PSTN-Gateway

I get the following error:

"Unable to find a codec translation path from ilbc to ulaw"

Setup SIP-phone:
disallow=all
allow=ilbc

Setup PSTN-Gateway:
disallow=all
allow=ulaw

I've googled for overn an houre. But no luck. So I'd really apreciate
any help!

Thanks!
Oliver

oliver,
what gateway provider are you referring to?    doesn't your sip phone 
connect directly to * as your diagram indicated?
DSL providers should not be doing any codec anything!
daveC

Oliver Brandt wrote:
> Hi!
>
> As the upstream of my DSL-connection is very slow, I'd like my
> sip-phones to use iLBC to connect to my *. My gateway provider only
> allows ulaw. Hence, I'd like to use the follwing setup:
>
> SIP-phone <--iLBC--> Asterisk <---ulaw----> PSTN-Gateway
>
> I get the following error:
>
> "Unable to find a codec translation path from ilbc to ulaw"
>
> Setup SIP-phone:
> disallow=all
> allow=ilbc
>
> Setup PSTN-Gateway:
> disallow=all
> allow=ulaw
>
> I've googled for overn an houre. But no luck. So I'd really
apreciate
> any help!
>
> Thanks!
> Oliver
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Oliver,
> SIP-phone <--iLBC--> Asterisk <---ulaw----> PSTN-Gateway
>
> I get the following error:
>
> "Unable to find a codec translation path from ilbc to ulaw"
Does your phone support ilbc as a codec ?
Is the codec_ilbc loaded on the * box ?
Usually you get this kind of error when the codec is not supported

Stelios S. Koroneos

Digital OPSiS - Embedded Inteligence
http://www.digital-opsis.com

> -----Original Message-----
> From: asterisk-users-bounces@lists.digium.com
> [mailto:asterisk-users-bounces@lists.digium.com]On Behalf Of Oliver Brandt
> Sent: Friday, April 27, 2007 7:08 PM
> To: asterisk-users@lists.digium.com
> Subject: [asterisk-users] Unable to find a codec translation path
> from ilbcto ulaw
>
>
> Hi!
>
> As the upstream of my DSL-connection is very slow, I'd like my
> sip-phones to use iLBC to connect to my *. My gateway provider only
> allows ulaw. Hence, I'd like to use the follwing setup:
>
> SIP-phone <--iLBC--> Asterisk <---ulaw----> PSTN-Gateway
>
> I get the following error:
>
> "Unable to find a codec translation path from ilbc to ulaw">
> Setup SIP-phone:
> disallow=all
> allow=ilbc
>
> Setup PSTN-Gateway:
> disallow=all
> allow=ulaw
>
> I've googled for overn an houre. But no luck. So I'd really
apreciate
> any help!
>
> Thanks!
> Oliver
> _______________________________________________
> --Bandwidth and Colocation provided by Easynews.com --
>
> asterisk-users mailing list
> To UNSUBSCRIBE or update options visit:
>    http://lists.digium.com/mailman/listinfo/asterisk-users
>

> Hi!
> 
> As the upstream of my DSL-connection is very slow, I'd like my
> sip-phones to use iLBC to connect to my *. My gateway provider only
> allows ulaw. Hence, I'd like to use the follwing setup:
> 
> SIP-phone <--iLBC--> Asterisk <---ulaw----> PSTN-Gateway
> 
> I get the following error:
> 
> "Unable to find a codec translation path from ilbc to ulaw"
> 
First, do a 'show translation' in the asterisk console to confirm that
asterisk is definitely not supporting the translation. If it doesn't
support it, you'll see a '-' instead of a number in the column and
row
for ilbc.

Debian's, and possibly other distributions binaries, seems to only
support ilbc in passthrough mode because of 'non-free' issues with the
codec. I assume there is a patent or something attached to it.

I believe you can build your own Asterisk to get around the issue, and
in fact I asked the same question a while back and I seem to remember
(but I'm not sure) that someone pointed me to a pre-compiled version in
someone else's Debian repository that included the ilbc transcoding
stuff.

hth

James

Just to follow up on my previous comment,
/usr/share/doc/asterisk/copyright contains the following on my Debian
system:

"
* The iLBC codec library code has been removed from the Debian asterisk
package as it does not conform with the DFSG.
"

James