[Server-devel] [XSCE] Proposal | SIP VoIP server on XSCE

[Alex Kleider]

On 2016-10-15 13:02, Sameer Verma wrote:
> On Fri, Oct 14, 2016 at 5:12 PM, Anish Mangal <anishmg at umich.edu> 
> wrote:
>> Following from:
>> http://www.en.voipforo.com/IAX/IAXvsSIP.php
>> 
>> If SIP is using a server signaling messages always pass through the 
>> server
>> but audio messages (RTP flow) can travel end to end without passing 
>> through
>> the server. In IAX, signaling and data must pass always through IAX 
>> server.
>> This increases the bandwidth need by the IAX servers when there are 
>> many
>> simultaneous calls.
>> 
>> 
>> This is a big drawback of IAX it seems, especially in a mesh setup, 
>> where in
>> many cases, the available bandwidth between clients may be higher via 
>> direct
>> node routes compared with the bandwidth via the server route. It seems 
>> SIP
>> will utilize the network more efficiently in a mesh topology.
>> 
>> Yesterday we were testing this on the server, and two nodes with three
>> client. The data was being sent directly client -- node -- node -- 
>> client,
>> and virtually no bandwidth was being used on the server. :)
> 
> Not always the case. One of my students worked on her thesis where she
> set up a bunch of XO-1 laptops over a 802.11s (draft) mesh and tested
> simultaneous calls to look for saturation, etc.
> https://www.dropbox.com/sh/0gszp4447j1g2qn/AAAxdUv_tNbstjzmD6BI1-jla/tilila-moujahid-thesis.pdf?dl=0
> 
> I'll see if I can find the actual thesis.
> 
> Sameer



Tilila El Moujahid presented her set up at one of the annual olpc-SF 
summits held a few years ago.
The next summit is coming up soon.