Yealink SIP-T2XP Administrator's Manual page 441

RFC 4568—Session Description Protocol (SDP) Security Descriptions for Media

Streams
RFC 4575—A SIP Event Package for Conference State

RFC 4579—SIP Call Control - Conferencing for User Agents

RFC 4662—A SIP Event Notification Extension for Resource Lists

RFC 5009—P-Early-Media Header

RFC 5079—Rejecting Anonymous Requests in SIP

RFC 5359—Session Initiation Protocol Service Examples

RFC 5589—Session Initiation Protocol (SIP) Call Control - Transfer

draft-levy-sip-diversion-04.txt—Diversion Indication in SIP

draft-ietf-sip-cc-transfer-05.txt—SIP Call Control - Transfer

draft-anil-sipping-bla-02.txt—Implementing Bridged Line Appearances (BLA) Using

Session Initiation Protocol (SIP)
draft-ietf-sip-privacy-04.txt—SIP Extensions for Network-Asserted Caller Identity

and Privacy within Trusted Networks
draft-ietf-sipping-cc-conferencing-03.txt—SIP Call Control - Conferencing for User

Agents
To find the applicable Request for Comments (RFC) document, go to
http://www.ietf.org/rfc.html
The following SIP request messages are supported:
Method
REGISTER
INVITE
ACK
CANCEL
BYE
OPTIONS
SUBSCRIBE
and enter the RFC number.
Supported
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Notes
Yealink IP phones support
mid-call changes such as
placing a call on hold as
signaled by a new INVITE
that contains an existing
Call-ID.
Appendix
425