[Asterisk-Users] Codec problems (SIP)

[Jorge Mendoza]

Terence Parker wrote:
> Hi again,
> 
> I've finally got Voicetronix OpenLine4 working so am a happy man ... thanks
> again to all those who helped! Just a few outstanding questions of curiosity
> :
> 
> 1. I have finally got my setup to work by allowing ONLY g711alaw and nothing
> else. Why should enabling a few extra codecs cause problems? Surely if two
> phones are able to work at g711alaw, and either side had a compatibility
> problem with anything else (i.e. g729a at one end but not at the other) -
> they would automatically negotiate to use g711alaw anyway? Is the
> system/phones not smart enough to do this and I have to explicitly specify
> what everything should use?
> 
My little experience on * tell me that some phones and/or channels do 
not negotiate very well the codec selection.

> Secondly, also regarding codecs....
> 
> 
>>>- I don't understand this as, surely, I have already enabled g729a and
>>>ulaw ... how can it complain that it can't transmit in that format, or
>>>that it can't find a path?
>>>
>>
>>How do you got the g729 codec? * does not include it. You must to pay
>>for that.
> 
> 
> ... okay, fine. But where can I buy it? And is there something specific I
> have to buy, or does any old thing work with asterisk? Or...?

* is OS, thus I can not include any think that needs license.
See Digium if you want to buy g729 codecs.

Jorge
> 
> Thanks again!
> 
> Terence
>