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Our company is interested in starting to look at VoIP to replace a legacy phone system that links 5 sites and approx. 450 users. &nbsp; Internally, we utilize Microsoft OCS/Exchange and would like to use these tools with the addition of voice for unified communications. &nbsp;In this scenario, do we just not buy the UC tools the VoIP vendors offer such as Shoretel’s Call Manager or Cisco Unified Personal Communicator? &nbsp;If so what makes the link to the VoIP system? &nbsp;Is there connector software that would be needed in its place? &nbsp;Is there pros/cons to this approach?<br />
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Our company is interested in starting to look at VoIP to replace a legacy phone system that links 5 sites and approx. 450 users.   Internally, we utilize Microsoft OCS/Exchange and would like to use these tools with the addition of voice for unified communications.  In this scenario, do we just not buy the UC tools the VoIP vendors offer such as Shoretel’s Call Manager or Cisco Unified Personal Communicator?  If so what makes the link to the VoIP system?  Is there connector software that would be needed in its place?  Is there pros/cons to this approach?



VoIP and OCS

The Microsoft Server topic includes all of the legacy versions of the operating system, including the Windows NT 3.1, NT 3.5, NT 4.0 and Windows 2000 and Windows Home Server versions.

Microsoft Server OS

Voice over IP (VoIP) is a methodology and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet. Other terms commonly associated with VoIP are IP telephony, Internet telephony, broadband telephony, and broadband phone service. The term specifically refers to the provisioning of communications services (voice, fax, SMS, voice-messaging) over the public Internet, rather than via the public switched telephone network (PSTN).  Examples of the VoIP protocols are H.323, Media Gateway Control Protocol (MGCP), Session Initiation Protocol (SIP), H.248 (also known as Media Gateway Control (Megaco)), Real-time Transport Protocol (RTP), Real-time Transport Control Protocol (RTCP), Secure Real-time Transport Protocol (SRTP), Session Description Protocol (SDP), and Inter-Asterisk eXchange (IAX).