The server will include new features, including native E-911 support, designed to finally establish OCS as a PBX replacement rather than a complement, which is the positioning for the current version even with its new SIP-trunking features.

Clear Choice Test:

In addition, Microsoft will introduce a new Voice Client Access License (CAL) needed to access the new PBX-killer's "enterprise-voice" features.

Microsoft is launching a promotion through its Software Assurance (SA) maintenance program to offer users up to two years free access to the new Voice CAL coming in OCS 2010.

OCS is the centerpiece of Microsoft's unified communications strategy and includes instant messaging, presence, conference and VoIP features. In February, the company , OCS 2007 R2.