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

[Samuel Greenfeld]

The downside to SIP is that if you leave a SIP server open on the Internet
which allows calls without authenticated registration (even by accident)
you will find dozens of systems trying to proxy long-distance &
international telephone calls through it.  If they can get through,
thousands of dollars of those calls may be billed to you.

SIP also has some firewall issues, although those can be mitigated with
proxies, a STUN server, and the proper configuration.

IAX2 historically has been meant to be an "Inter-Asterisk" server trunking
protocol, not something for individual clients.

On Fri, Oct 14, 2016 at 8:55 PM, Anish Mangal <anishmg at umich.edu> wrote:

> This looks interesting, but I would prefer to stick with SIP
>
> Reason:
> 1. It is extremely scalable from running on tiny openWRT routers to big
> servers
> 2. It is supported by a large number of free/open clients on ALL
> platforms. There is also a webRTC socket for it.
>
> The only current drawback of Kamailio right now, is there dont seem to be
> ootb rpms available for arm. If there is a SIP server out there with ARM
> packages, would love to test it, or otherwise - compile kamailio for ARM
>
>
> On Sat, Oct 15, 2016 at 6:08 AM, Joel Steres <joel.steres at ymobility.com>
> wrote:
>
>> Does webrtc fit your use case? http://peerjs.com is one.
>>
>> On Oct 14, 2016 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. :)
>>>
>>> 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
>>>
>>>
>>>
>
>
> --
> Anish
>
>
>
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