Yealink T40G Administrator's Guide

Appendix
589
 RFC 3960—Early Media and Ringing Tone Generation in SIP
 RFC 3966—The tel URI for telephone number
 RFC 3968—IANA Registry for SIP Header Field
 RFC 3969—IANA Registry for SIP URI
 RFC 4028—Session Timers in the Session Initiation Protocol (SIP)
 RFC 4083—3GPP Release 5 Requirements on SIP
 RFC 4235—An INVITE-Initiated Dialog Event Package for the Session Initiation Protocol (SIP)
 RFC 4244—An Extension to the SIP for Request History Information
 RFC 4317—Session Description Protocol (SDP) Offer/Answer Examples
 RFC 4353—A Framework for Conferencing with the SIP
 RFC 4458—SIP URIs for Applications such as Voicemail and Interactive Voice Response (IVR)
 RFC 4475—Session Initiation Protocol (SIP) Torture
 RFC 4485—Guidelines for Authors of Extensions to the SIP
 RFC 4504—SIP Telephony Device Requirements and Configuration
 RFC 4566—SDP: Session Description Protocol.
 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 4583—Session Description Protocol (SDP) Format for Binary Floor Control Protocol (BFCP) Streams
 RFC 4662—A SIP Event Notification Extension for Resource Lists

Yealink T40G Specifications

General

SIP Accounts	3
Wall Mountable	Yes
Opus Codec	No
Display	2.3 inch 132x64-pixel graphical LCD
Network	Dual-port Gigabit Ethernet
PoE	Yes
Headset Support	Yes, RJ9 port
Power Adapter	Optional
Voice Codecs	G.722, G.711(A/μ), G.729AB, G.726
Local Phonebook	1000 entries