[Asterisk-Users] G.729: Typical usage scenarios

[John Todd]

That is correct.  The ATA-186 processor, apparently, is not equipped 
to handle compression on both ports at the same time with G.729 as 
the default codec.  Plus, G.729 doesn't sound good at all when 
talking to people on cell phones.  I would avoid G.729 if at all 
possible.

JT



>Dear John
>
>I indestand that the ATA-186 working with G.729 Codel 3 only works 1 port at
>the same time, do you know something about it?
>
>regards
>
>Humberto
>
>
>Mensaje citado por: John Todd <jtodd at loligo.com>:
>
>>  >Clicking on the "For more information, click here" link on the
>>  >Digium site nice brings back up the same page I was looking at
>>  >before, without any additional G.729 information that I can see.
>>  >
>>  >I'm wondering if some kind asterisker out there could provide us
>>  >neophytes with some "typical scenarios" where that codec would be
>>  >useful to us.
>>  >
>>  >For instance, I assume that it doesn't gain anything on calls passed
>>  >out to the PSTN?
>>
>>  Well, if your Asterisk server is right next to your UA (ATA-186) on
>>  the same ethernet, you don't gain anything - you should stick with
>>  the ~80kbps G711 codecs which sound better.  If your Asterisk server
>>  is on a different continent across a 56kbps satellite link, then I
>>  would suggest that you look into the G729 codec.  People who are
>>  bandwidth constrained and have multiple UA's connecting from distant
>>  locations are most likely to benefit from G729.
>>
>>  >Do the Cisco ATA186s have any ability to handle this codec?
>>
>>  Yes.  Set LBRCodec to "3" and then set TXCodec to "3" and RXCodec to
>>  "3" to set G729
>>
>>  >Perhaps it would be useful if I'm trunking from a FXS port here
>>  >locally to an FXO port that is connected to a remote asterisk server?
>>
>>  Only if you have critical bandwidth shortages.
>>
>>  >Also, is the license "once in a lifetime" for a given channel?
>>
>>  One-time payment per channel.  No recurring fees.
>>
>>  JT
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>
>
>
>Humberto Atristain V.
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