User Guide

> Revolutionary new design
> Yealink Optima HD voice
> 2.3” 132x64-pixel graphical LCD
with backlight
> Dual-port Gigabit Ethernet
> Up to three SIP accounts
> Paper label-free design
> Opus codec support
> PoE support
> Headset, electronic hook
switch (EHS) support
> Stand with two adjustable angles
> Wall mountable
> Simple, flexible and secure
provisioning options
Key Features and Benefits
Revolutionary New Design
Yealink's SIP Phones continue to evolve alongside the company. From the initial strategizing
phase to the development stages, the robust T4 Series, including the SIP-T40G, ensures an
optimum user experience even in the smallest of details, such as the solution’s new paper
label-free design, simple-to-use foot stand, non-slip rubber feet and ergonomic recessed
buttons.
HD Audio
Yealink’s Optima HD Voice refers to the combination of software and hardware design as
well as the implementation of wideband technology and advanced acoustic elements, such
as duplex, echo cancellation and adaptive jitter buffer, in order to maximize the product’s
acoustic performance. All of these create an amazing unparalleled face-to-face, live
experience.
Enhanced Call Management
The SIP-T40G supports vast productivity-enhancing features, such as SCA, BLF List, call
forward, call transfer, three-way conference, etc. Furthermore, this SIP phone supports for
the Yealink YHS32/YHS33 headset as well as Yealink EHS36 Wireless Headset Adapter,
enabling users to control his or her phone through wireless headset directly.
Efficient Installation and Provisioning
Integrated IEEE 802.3af (PoE) allows for easy deployment with centralized powering and
backup. The SIP-T40G supports FTP, TFTP, HTTP, and HTTPS protocols for file provisioning
and is configured by default to use Trivial File Transfer Protocol (TFTP). Additionally, the
phone supports AES encrypted XML configuration files.
Secure Transport and Interoperability
The SIP-T40G uses SIP over Transport Layer Security (TLS/SSL) in order to arm service
providers with the latest technology for enhanced network security. The entire T40G phone
is certified with 3CX and BroadSoft Broadworks, being excellently compatible with leading
soft switch suppliers to ensure the most seamless deployment and installation.
Yealink SIP-T40G is a feature-rich SIP phone that enhances daily interoperability and unifys communications for busy
managers. Designed with a revolutionary new appearance, it supports flexible and secure provisioning (the phone
utilizes industry-standard encryption protocols for users to provision and perform software upgrades both in-house
and remotely), this advanced IP phone is intuitively designed with ease-of-use in mind. The T40G is also built with the
Gigabit Ethernet for rapidly facilitating call handling, and its programmable keys help boast extensive
productivity-enhancing features, like BLF, SCA, call transfer, etc. Meanwhile, equipped with the feature of Power over
Ethernet (PoE), superb high definition (HD) sound quality and a rich visual experience, the SIP-T40G IP Phone
maximizes your personal productivity in a superior way.
SIP-T40G
Gigabit IP Phone with Three Lines & HD Voice
HD Voice Paperless
www.yealink.com
Opus Codec
Gigabit