asterisk users - Sep 2009 - G.729 for Asterisk

Hello



I have a confusion relating to G.729 codec.
I know how to install where to get license but i really don't know why we
need it?

Why people use G.729 codec with asterisk?

look all  functionality can be done with out it ie calling from sip to iax
protocol and  sip/ iax to E1, then why we need this??

regards
Adam
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silent sayz wrote:
> why we need it?
IMHO, Actually we don't.
> Why people use G.729 codec with asterisk?
Because it has a very good bandwidth/quality relation. Or because you
need to inter-operate with another system based on this codec.

A codec is completely independent from the protocol used. I guess you're
mistaking the protocol (SIP, IAX2, H.323) for the codec (G.711, G.729, GSM,
iLBC).

You don't have to necessarily use G.729 codec, but a lot of VoIP providers
use just G.729 or G.711 codecs in their platforms, so it's a matter of
interoperability.

Also, IMHO, G.729 has the best voice quality for a compressed codec. Many users
can't notice the difference in a call using G.711 and G.729. The same can
not always be said for other compressed codecs like GSM or iLBC.



Vin?cius Fontes
www.asteriskforum.com.br - Informa??es e discuss?o sobre Asterisk e telefonia IP

----- "silent sayz" <silent.sayz at gmail.com> escreveu:
> Hello
> 
> 
> 
> I have a confusion relating to G.729 codec.
> I know how to install where to get license but i really don't know why
> we need it?
> 
> Why people use G.729 codec with asterisk?
> 
> look all functionality can be done with out it ie calling from sip to
> iax protocol and sip/ iax to E1, then why we need this??
> 
> regards
> Adam
> 
> 
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Thanks Ivan Stepaniuk.

Thanks Vinicius for the the clear explanation.

So we use this codec because it have good quality and many VOIP providers
use it.(for interoperabilty) because Asterisk dont support this codec by
default and we have to buy a lisence for it(per channel basis).

Thanks Alot

Adam
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