Null Pointers

We are setting up a full-bore implementation of Microsoft Office Communications Server 2007 R2 (OCS 2007 R2) in order to evaluate its capabilities. To date, I have set up a full Enterprise-type deployment and it is working flawlessly (e.g. all functions of Office Communicator 2007 R2 and Communicator Web Access work as expected, both on the intranet LAN and via the public Internet). We will be expanding our evaluation to include the broader Unified Communications platform which uses additional functionality provided by Exchange 2007 (which we also have deployed and operational).

Some of the OCS and UC features require the use of POTS lines to give "regular" (non-IP-phone-or-SIP-client-using) users access to facilities such as audio conferencing, LiveMeeting, voice-driven access to Outlook, etc. In order to do this, you need to provide OCS and Exchange with SIP-based access to POTS lines. I was given this task, and chose the Trixbox soft PBX platform as an element of my solution. In Part 1 of this article, I will describe the setup of Trixbox and the use of a Quintum SIP gateway to connect to our POTS lines.