[asterisk-users] Choose IAX or SIP trunking?

[Kirill 'Big K' Katsnelson]

Steve Edwards wrote:
>> My understanding was that IAX encapsulates the same RTP traffic, or, and 
>> the very least, same stream of data encoded by a codec. Is that not true 
>> in case of IAX? How can a transport protocol affect volume--or quality 
>> (lest it is dropping packets)?
> 
> My (limited) understanding is that IAX sends all call control and RTP to 
> port 4569. Thus, a busy pipe can adversely affect timing if the single 
> thread reading from the socket can't process the packets fast enough.
> 
> Whether this manifests itself as dropped packets or jitter or whatever is 
> beyond my experience. I've never had a client complain, but most of my 
> traffic is within the same cabinet.

I think I see now. Thanks for you response!

  -kkm