I work in an IT office where the boss wants to go with the upgrade to version 3.0 - mobile office is pushing it and SIPs enablement .  Looking at what's new in 3.0 I don't see any mention of Sips so far.

The dealer was waxing lyrical about it.

I think I must of mis-understood.

ip office does not supports SIP, I think your dealer must have misunderstood something.

Depending on pressure from dealers and customers, SIP may come out in IP Office release 14.6....

just kiddin....

Sorry, this has been a touchy spot with us and Avaya

If I search through the threads for SIP - I see MrIPO said .....

SIP is not supported on IPO 1.4/2.0/2.1 SIP support will come with 3.0

I guess Avaya are the cause of this.

Let me tell you from experience that a lot of things are slipped out by Avaya. When it comes down to it, only believe what is in front of you at install time. If the feature is not there, then it didn't make it into the load. They will most likely suggest a "feature request".

There are of course ways around the SIP problem.. Unfortunatly, they can get pricey.  You would have to have a VCM, then buy the IP Endpoints License and then have a seperate SIP to H323 Gateway. (I am currently looking into setting up the free open Source PBX Asterisk to do this.)  All it takes is $$$.

Whats the advantage of SIP against H.323 for VoIP?
I don't see any yet.

One is that there is lots of Open Source and Free Development going on for SIP.  The reason I am thinking of deploying Asterisk is for people who are far from the office.  Then they can call each other via SIP and if they need access to the office extensions, they have that too via H.323.  All for almost nothing.
The other thing about SIP is that it is *very* lightweight compared to H.323.  H.323 has the ability for video, multimedia, etc etc.. whereas SIP is about VOIP and thats about all.  This means the specifications for H.323 are *huge*.  Not very easy to grok by everyone, which could lead to more bugs etc. etc.

At least thats the way I am understanding the whole H.323 vs. SIP holy war going on. :)

I'd argue with "SIP is about VoIP and thats about all". SIP ties in with presence and the users availability via other media than just phone (IM, email, video, ...) - though thats all to the plus side against H323.

Avaya tell you a different thing with every roadmap. There is No ETA for SIP trunking currently that I have seen, my guess is the handsets support will come first, as this is being pushed from the ACM side..

Umm anotherprivatebuild !!!