Unison Unified Communication server is getting a bit of airtime lately. Why? Cheap, Simple and combines pbx, email, IM and directory server in one box. I did some quick reading and these are some of my comments and questions.
-Doesn’t appear to have Windows Mobile Presence / Voice Client?
-Server does not work with MS Outlook.
-It doesn't have a webmail or webIM client (Note2)
-It doesn't do Desktop sharing
-It doesn't appear to support video calls or video conferencing.
-No low bandwidth codec (such as G729)
-Presence ubiquity is a BIG question I have
-Will it Sync to Windows Mobile Calendar? Tasks? (Note1)
-API’s? Application Integration? Can I easily build presence into my apps?
-Will it support existing Line of Business Application Integration?
-I see very little hardware assistance on support site. PBX will require phones, gateways...
-It is based on Linux (which is infrastructure I'm not familiar with)
It looks like Unison has a clean, start over approach. It looks like they may be nailing the simple, cheap (OCS Small Business Server market? ;-) solution--but missing that people need to accomodate some existing infrastructure. It appears they are the "new kid on block" with a ways to go to maturity.
In all reality at the moment we are using OCS Hosted to supplement an existing IP PBX or tradition PBX. At the moment Unison appears to have some big things missing-- at least for our needs.
Note1: It appears like it does for $10/user/month. Which is more than we charge for OCS hosted! Source.
Note2: The training shows a web client, but the FAQ says there is none. Maybe it is just not in hosted edition?