RFC4458 Session Initiation Protocol (SIP) URIs for Applications such as Voicemail and Interactive Voice Response (IVR)
RFC4458 Session Initiation Protocol (SIP) URIs for Applications such as Voicemail and Interactive Voice Response (IVR) C. Jennings, F. Audet, J. Elwell [ April 2006 ] (TXT = 41378 bytes)
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