[Asterisk-Users] G.726 codec - can we select bandwidth?

Leo Ann Boon leo at datvoiz.com
Fri Mar 3 23:30:10 MST 2006


Steve Underwood wrote:

> Leo Ann Boon wrote:
>
>> Whisker, Peter wrote:
>>
>>> Can someone please tell me if it's possible to select the G726 codec 
>>> bandwidth for an IAX trunk between two Asterisk 1.2.5 servers?
>>>
>>> I can select "disallow=all / allow=g726" but I think it defaults to 
>>> the g726-32 variant.
>>>
>>> Is there any way of forcing Asterisk to use g726-24 for such a trunk 
>>> example?
>>>
>> IIRC, g.726-24 and g.726-16 are patented.
>
>
> You recall incorrectly. G.726-40, G.726-24, and G.726-16 are just 
> minor reworks of G.726-32 to trade quality and bit rate.

I must have been confused by the wording in this thread
http://lists.digium.com/pipermail/asterisk-users/2004-October/066825.html

>Also at the time Mark wrote it.  G726-32 was VERY in the clear on patents
>because G726-32 was really the old G721 standard.  The old G723 and Old G721
>equals todays G726.  (Also G723 and G723.1 are two different things)
>
Thanks for the correction.





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