[Serusers] (open)SER and ICE

[Nils Ohlmeier]

Hi,

short version: you do not need to change or update anything on the server side 
to get ICE support working.

In more details:
First  of all ICE is still a draft, and no end in sight yet.
Secondly, good luck in finding two interoperable UA with ICE support! :-)
UA's with ICE support will advertise all their possible IP addresses in the 
SDP. As long as the proxies do not change theses additional addresses, but 
only the address in the m-line everything works fine and transparent. And I 
think (and hope) that the current nathelper modules only touch the m-line and 
no other IP addresses in the SDP.
When the other UA sees the additional addresses in SDP, it will probe these 
addresses. The address which answers first will be used for media. And 
normally a local address should always be faster then any address which goes 
through the Internet or even relayed (like with an RTP proxy).
What you are probably thinking of is, that an UA with ICE support could also 
advertise its IP address and port of the RTP proxy, but this is then called 
TURN. And I think that is even more far away from becoming a standard, 
besides that their are AFAIK no UA's or TURN servers available yet.

Hope this helps
  Nils

On Wednesday 30 November 2005 16:36, Christophe Irles wrote:
> Hi,
>
> As I'm a newbie on this subject, I'm wondering how two SIP devices with ICE
> compatibility will interact with a (open)SER+Mediaproxy implementation
> since ICE implementation could permit to avoid RTP flow on the (open)SER
> server.
>
> Is there any update to do on the conf file on the (open)SER ? Since they
> are ICE compatible, the SIP flow (signalization)  will be analysed by this
> two devices in order to create a direct RTP flow ? Or is it because i know
> on the (open)SER side that this devices are ICE compatible I send a special
> SIP message ? In fact I want to know if a server update is necessary or if
> it's "free" to have this great feature. :)
>
> Thanks,
> Christophe
>
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