SIP: The next step in converged unified IP communications
Session Initiation Protocol (SIP) builds on the IP communications foundation by providing a standards-based approach to enabling IP communications with numerous devices and applications.
This paper describes the benefits of SIP to enterprise customers and explains the comprehensive Cisco® roadmap for delivering SIP-based solutions-an evolving strategy that helps deliver stronger IP communications benefits to enterprise customers today and in the future.
http://www.cisco.com/en/US/tech/tk652/tk701/technologies_white_paper0900aecd80131325.shtml
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