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

[Sameer Verma]

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

>
> On Sat, Oct 15, 2016 at 5:07 AM, Anish Mangal <anishmg at umich.edu> wrote:
>>
>> Will look into IAX2. Is it supported by apps on different clients? For
>> SIP, there are usually many client options available on various platforms.
>>
>> On Fri, Oct 14, 2016 at 9:22 PM, Sameer Verma <sverma at sfsu.edu> wrote:
>>>
>>> What server/service are you using? Look at IAX2 as well. Usually IAX2
>>> does better on networks because unlike SIP, session initiation and voice
>>> call happen on the same port.
>>>
>>> Sameer
>>>
>>>
>>> On Oct 14, 2016 4:48 AM, "Anish Mangal" <anishmg at umich.edu> wrote:
>>>>
>>>> Hi,
>>>>
>>>> A SIP server on the XSCE will allow for VOIP services (audio, video,
>>>> text). There are numerous SIP clients on various platforms so it seems a
>>>> good protocol and standard to build upon.
>>>>
>>>> I have already included a SIP server in the upcoming deployment of XSCE
>>>> and mesh in Spiti, north India.
>>>>
>>>> Thoughts?
>>>>
>>>> Best,
>>>> Anish
>>>>
>>>>
>>
>>
>>
>> --
>> Anish
>>
>>
>
>
>
> --
> Anish
>
>