T42U- Data Sheet

Key Features and Benefits
Easy Customization and High Expansibility
Accompanied by two USB ports, the T42U is your right-hand man in the office that makes
Bluetooth, Wi-Fi, USB headset and USB recording possible, and you can use any two of
them freely according to your needs to enrich phone features. Meanwhile, the phone has
three pages of flexible buttons that can be easily programmed with 15 paperless DSS keys
at most.
HD Audio
Yealink Optima HD Voice technology combines cutting-edge hardware and software with
wideband technology for maximum acoustic performance. Being a totally open, highly
versatile audio codec, Opus, is designed to perform a higher HD audio quality than other
wideband codecs in a high network bandwidth; However, if your current network quality is
poor, Opus can provide you with a better audio quality than other narrowband codecs.
And its hearing aid compatible (HAC) handset helps the person who is with hearing loss to
hear the voice more clearly.
Efficient Installation and Provisioning
Yealink T4U series supports efficient provisioning and effortless mass deployment with
Yealink’s Redirection and Provisioning Service (RPS) and Boot mechanism to help you
realize the Zero Touch Provisioning without any complex manual settings, which makes
the T4U series simple to deploy, easy to maintain and upgrade. Furthermore, a unified
firmware and auto-p template that applies to all T4U phone models, saves even more time
and costs for businesses, as well as simplifies the management and maintenance.
Secure Transport and Interoperability
Yealink T4U series uses SIP over Transport Layer Security (TLS/SSL), which is the latest
network security technology. It’s also compatible with leading soft switch suppliers, such
as 3CX, Broadsoft Broadworks. Moreover, it is carried with dual fimrware images that gives
you a enterprise-level protection to avoid bricking your system once upgrade failed.
SIP-T42U
A Well-Rounded SIP Phone for Clear Communications
The SIP-T42U IP phone is a feature-rich business tool for excellent communications and extended functionality. Coming
with plentiful built-in programmable keys, this 12-line IP phone guarantees the enhanced productivity. United Yealink
Optima HD Voice technology and wideband codec of Opus, the T42U awards you the superb audio quality and
crystal-clear voice communications. The phone feels quicker and more responsive when performing call features.
Moreover, the T42U puts dual USB ports in a phone that makes Bluetooth, Wi-Fi, USB headset and USB recording come
true, and you can use any two of them freely according to your needs. The Yealink new T4U series offers the same elegant
appearance as the T4 line, but with improvements for greater interoperability and better collaboration.
Optima
HD Voice
Dual USB
Ports
www.yealink.com
• 2.7" 192x64-pixel graphical LCD with
backlight
• Dual USB ports
• Dual firmware images
• Opus codec support
• T4U Auto-P template unified
• T4U firmware unified
• Up to 12 SIP accounts
• PoE support
• Dual-port Gigabit Ethernet
• USB headset and EHS support
• Wi-Fi via WF40/WF50
• Bluetooth via BT40/BT41
• Stand with 2 adjustable angles
• Wall mountable
Opus Codec
Unified
Firmware
Acoustic
Shield
Gigabit