Yealink SIP-T4X Administrator's Manual page 421

RFC 3959—The Early Session Disposition Type for SIP
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RFC 3960—Early Media and Ringing Tone Generation in SIP
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RFC3966—The tel URI for telephone number
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RFC 3968—The Internet Assigned Number Authority (IANA) Header Field
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Parameter Registry for the Session Initiation Protocol (SIP)
RFC 3969—The Internet Assigned Number Authority (IANA) Uniform Resource
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Identifier (URI) Parameter Registry for the Session Initiation Protocol (SIP)
RFC 4028—Session Timers in the Session Initiation Protocol (SIP)
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RFC 4235—An INVITE-Initiated Dialog Event Package for the Session Initiation
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Protocol (SIP)
RFC 4244—An Extension to the SIP for Request History Information
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RFC 4317—Session Description Protocol (SDP) Offer/Answer Examples
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RFC 4353—A Framework for Conferencing with the SIP
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RFC 4475—Session Initiation Protocol (SIP) Torture
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RFC 4485—Guidelines for Authors of Extensions to the SIP
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RFC 4504—SIP Telephony Device Requirements and Configuration
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RFC 4566—SDP: Session Description Protocol.
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RFC 4568—Session Description Protocol (SDP) Security Descriptions for Media
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Streams
RFC 4575—A SIP Event Package for Conference State
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RFC 4579—SIP Call Control - Conferencing for User Agents
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RFC 4662—A SIP Event Notification Extension for Resource Lists
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RFC 5009—P-Early-Media Header
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RFC 5079—Rejecting Anonymous Requests in SIP
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RFC 5359—Session Initiation Protocol Service Examples
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RFC 5589—Session Initiation Protocol (SIP) Call Control - Transfer
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draft-levy-sip-diversion-04.txt—Diversion Indication in SIP
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draft-ietf-sip-cc-transfer-05.txt—SIP Call Control - Transfer
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draft-anil-sipping-bla-02.txt—Implementing Bridged Line Appearances (BLA) Using
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Session Initiation Protocol (SIP)
draft-ietf-sip-privacy-04.txt—SIP Extensions for Network-Asserted Caller Identity
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and Privacy within Trusted Networks
draft-ietf-sipping-cc-conferencing-03.txt—SIP Call Control - Conferencing for User
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Agents
To find the applicable Request for Comments (RFC) document, go to
http://www.ietf.org/rfc.html and enter the RFC number.
Appendix
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