Yealink T40G Administrator's Guide

Appendix
588
 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: Transport Protocol for Real-Time Applications
 RFC 3555—MIME Type Registration of RTP Payload Formats
 RFC 3581—An Extension to the SIP for Symmetric Response Routing
 RFC 3608—SIP Extension Header Field for Service Route Discovery During Registration
 RFC 3611—RTP Control Protocol Extended Reports (RTCP XR)
 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 3863—Presence Information Data Format
 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

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