The Microsoft Exchange Unified Messaging ‘Play on Phone’ feature provides access to voice mail messages for UM-enabled users. However, instead of playing the media attachment from a voice mail message over their computer speakers, users can listen to...

I recently stumbled on a free offering for a DID SIP Trunk (inbound calls only) from a company called IP Communications.  Having already added a magicJack device to my Unified Communications lab for routing both inbound and outbound calls, an additional...

Introduction This guide describes how to configure interoperability between Microsoft Exchange Server 2010 Unified Messaging and pbxnsip IP PBX version 3.0 .   pbxnsip is an IP PBX solution for Windows that supports SIP communication over either...

One day while at work, my buddy Geoff Clark and I were discussing how expensive it can be to deploy a lab environment at home, especially one that supports VoIP telephony. When you combine the initial cost of purchasing new server hardware and telephony...

During the development of Exchange 2010 Unified Messaging, several changes were made to the URI parsing logic for calls that are handled by Unified Messaging servers.  When a call is routed to Unified Messaging server, each of the URI values contained...