>>> "[email protected]" <[email protected]> 07/03/12 2:09 PM >>> >> Your biggest question is what to use for your internet connection. If they >> will have 24 simultaneous calls your looking at about 2048 KB if using >> G.711U (86KB with payload plus overhead). Which means you will need to >> move to G.729 to fit your max call bandwidth inside a T1. > >Appia told me all of their trunks are G.729 if I remember correctly. By the >way, does anyone know what the total amount of bandwidth would be per G.729 >channel >with overhead?
Appia doesn't hard code the codecs at all (if they limited it to G.729, AA/VM wouldnt work...its ulaw only). Rather its negotiated via the SDP. They allow both g729 and G711u. So you can choose your codec based on what you allow via sipxbridge and the codec order in the endpoint. G.729 is about 32k with packet overhead. Here is the reference i always use for codecs: http://www.cisco.com/en/US/tech/tk652/tk698/technologies_tech_note09186a0080094ae2.shtml
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