Enterprise Voice 17• originate and receive Public Switched Telephone Network (PSTN) callsfrom the Office Communicator (OC) 2007 soft client when away fromthe office.• take advantage of existing business telephony features on the CS 1000.Enterprise VoiceThis section describes the Office Communications Server (OCS) 2007Enterprise Voice solution. The Nortel Converged Office feature integratesthe OCS 2007 with the CS 1000. For a description of the integrated networkfrom the CS 1000 perspective, see "Network configuration" (page 36).Enterprise Voice is Microsoft’s software-powered VoIP solution, a SIP-basedimplementation of IP telephony for the enterprise that does not rely onproprietary hardware investments. Enterprise Voice is a full-featured VoIPsolution that includes connectivity to the PSTN gateways and interoperationwith the CS 1000. Enterprise Voice, IM, group IM, enhanced presence,and audio-video conferencing together constitute the Microsoft UnifiedCommunications solution.The following figure shows the OCS 2007 Enterprise Voice componentsextracted from the overall OCS 2007 architecture. COMO refers toCommunicator Mobile.Figure 1Enterprise Voice components - OCS 2007When a user calls from an Enterprise Voice client by dialing or clicking on acontact name or number in OC 2007 or Outlook:• the OCS Front End server normalizes the number to the E.164 format,and invokes routing rules based on the location profile and user policy,and directs the call to the appropriate Mediation ServerNortel Communication Server 1000Nortel Converged Office Fundamentals — Microsoft Office Communications Server 2007NN43001-121 01.03 StandardRelease 5.0 30 April 2008Copyright © 2005–2008, Nortel Networks.
