We are a small business (about 40 people) in Los Angeles with several small offices (about 2-5 users each) around the world and are looking to switch from a Hosted IP Solution to an in-house SIP solution and are seriously considering pbxnsip. We currently have Exchange 2007 and OCS 2007 and are looking to unify our communications/messaging with whatever IPPBX solution we choose. We want to keep all of our existing handsets, mostly Polycom IP 501, 601 and 430s.
Also, we are talking to XO Communications to provide us with a 10Mb Dedicated Ethernet connection (we deal with very large files on a daily basis) with SIP Trunking. They have told us that pbxnsip is not officially supported on their list of IPPBXs, although I’m sure it could work seeing as though they are providing us a basic SIP Trunk.
Are there any IP Telephony specialists in the LA area who integrate pbxnsip. I’m sure our IT team could do it themselves, but I’d like piece of mind that everything is going to work day 1. If not, what kind of support does pbxnsip offer to help us integrate everything together?
We have a few questions, such as:
1. What add’l equipment will we need? Do we need a gateway (such as the AudioCodes Mediant 1000) with XO Communications SIP Trunking or does it terminate directly into pbxnsip?
2. Is there any add’l equipment needed to integrate MS Unified Communications? We already have an Exchange 20007 and OCS 2007 Server. I’m assuming we’ll need to setup a Mediation Server.
3. Is there a visual network topology diagram we can refence to see how the equipment is situated?
Any help would be greatly appreciated. We're looking to make this decision in the next 30 days.
-t