Yealink SIP-T2xP Administrator's Manual page 451

RFC 3311—The Session Initiation Protocol (SIP) UPDATE Method

RFC 3312—Integration of Resource Management and SIP

RFC 3313—Private SIP Extensions for Media Authorization

RFC 3323—A Privacy Mechanism for the Session Initiation Protocol (SIP)

RFC 3324—Requirements for Network Asserted Identity

RFC 3325—SIP Asserted Identity

RFC 3326—The Reason Header Field for the Session Initiation Protocol (SIP)

RFC 3372—SIP for Telephones (SIP-T): Context and Architectures

RFC 3420—Internet Media Type message/sipfrag

RFC 3428—Session Initiation Protocol (SIP) Extension for Instant Messaging

RFC 3455—Private Header (P-Header) Extensions to the SIP for the 3GPP

RFC 3486—Compressing the Session Initiation Protocol (SIP)

RFC 3489—STUN - Simple Traversal of User Datagram Protocol (UDP) Through

Network Address Translators (NATs)
RFC 3515—The Session Initiation Protocol (SIP) Refer Method

RFC 3550—RTP , RTCP , IETF RFC 3550

RFC 3556—Session Description Protocol (SDP) Bandwidth Modifiers for RTCP

Bandwidth
RFC 3581—An Extension to the SIP for Symmetric Response Routing

RFC 3608—SIP Extension Header Field for Service Route Discovery During

Registration
RFC 3665—Session Initiation Protocol (SIP) Basic Call Flow Examples

RFC 3666—SIP Public Switched Telephone Network (PSTN) Call Flows.

RFC 3680—SIP Event Package for Registrations

RFC 3702—Authentication, Authorization, and Accounting Requirements for the SIP

RFC 3711—The Secure Real-time Transport Protocol (SRTP)

RFC 3725—Best Current Practices for Third Party Call Control (3pcc) in the Session

Initiation Protocol (SIP)
RFC 3842—A Message Summary and Message Waiting Indication Event Package

for the Session Initiation Protocol (SIP)
RFC 3856—A Presence Event Package for Session Initiation Protocol (SIP)

RFC 3890—A Transport Independent Bandwidth Modifier for the SDP

RFC 3891—The Session Initiation Protocol (SIP) "Replaces" Header

RFC 3892—The Session Initiation Protocol (SIP) Referred-By Mechanism

RFC 3959—The Early Session Disposition Type for SIP

Appendix
435