[Freeswitch-users] How the IAX2 is supported in freeswitch?

Ken Rice krice at freeswitch.org
Sun Nov 18 03:36:55 MSK 2012


IAX2 doesn¹t really offer that much lower bandwidth then SIP... Adjusting
the ptime on calls can achieve the same effect as enabling IAX2 trunking.
example:

G711 PCMU or PCMA at 20ms ptime is about 80kbps,

Move to G729 and this drops to 24kbps, about a 70% savings in bandwidth, now
add a 60ms ptime to this, and the bandwidth requirement drops to 13.3kbps
nearly an over all 84% savings in bandwidth...

So the who IAX argument is killed at that point

On 11/17/12 7:48 AM, "ZhouJianhua" <jh.zhou at outlook.com> wrote:

> Hi,
> 
> I need to reduce the bandwidth of media stream, and RTP is too heavy for us.
> IAX can carry more data in one packet, but the protocol is not supported as
> well as SIP in FS.
> 
> I just want to know that is there anyone used IAX in freeswitch ?
> And is it worth a try?
> 
> Thanks.
>        
> 
> 
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-- 
Ken
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