Specification Sheet

Key Features and Benefits
The T42S is a feature-rich business tool for superior communications and extended functionality,
which is ideal for common area use and for staff in the call center. It offers a faster, more-respon-
sive interface than the T42G and several performance-enhancing functions.
The T42S with Yealink Optima HD Voice technology and SILK codec delivers superb audio quality
and crystal clear voice communications. Meanwhile, it supports Conferencing, Boss/Admin,
Common Area Phone, Calendar, Hot-desking and other productivity-enhancing functions. Its
class2 PoE (power over Ethernet) helps to reduce its carbon footprint and its Gigabit Ethernet
technology is built for rapid call handling. The model is wall-mountable and can be paired with
Yealink YHS32/YHS33 headset and other major brand headsets via the Yealink EHS36 Wireless
Headset Adapter.
Professional IP Phone Compatible with Microsoft
®
Skype for Business
www.yealink.com
T42S-Skype for Business Edition
Yealink Skype for Business HD IP Phones
BToE
Optima
HD Voice
Paperless
USB 2.0 HAC
Gigabit
• Optima HD Voice
• 2.7" 192 x 64-pixel backlit LCD
• SILK Speech Codec support
• USB 2.0
• Compatible with Office 365
• Calendar, Boss/Admin support
• Common Area Phone
• Meet Now
• QoE (monitoring reports)
• PoE support
• USB headset
• YHS32/YHS33, EHS support
• Wall mountable
Optima HD Voice
Yealink Optima HD Voice technology combines cutting-edge hardware and software with
wideband technology for maximum acoustic performance. As a speech codec for real-time,
packet-based voice communications, SILK, is designed to perform a higher HD audio quality which
provides scalability in several dimensions and is highly scalable in terms of audio bandwidth,
network bit rate, and complexity. And its hearing aid compatible (HAC) handset helps the person
who is with hearing loss to hear the voice more clearly.
Maximize Productivity
Yealink’s T42S is fully compatible with Skype for Business online, on-premises and hybrid deploy-
ment, effectively extending the benefits of Microsoft
®
Skype for Business. Pin your favorite
contacts directly to the home screen, visually arrange them as you like, and dial them easily with
just a tap. The T42S lets users synchronize Outlook Calendar meeting schedules in real-time by
simply clicking to join a meeting. Further outfitted with directory synchronization, visual voicemail
management, Boss/Admin and more, it raises the bar for productivity to new heights. With an
all-new USB port, the T42S boasts unparalleled functionality and expansibility with USB recording
and USB headset features.
Effortless Deployment
Supporting Microsoft’s Skype for Business Server in-band provisioning and in-band configuration
management enables a carefree configuration and easier-than-ever mass deployment. Automati-
cally deploy on a variety of servers- http, https, tftp and ftp, Yealink’s T42S can even be pre-in-
stalled with Yealink’s premium software for Skype for Business prior to shipping, meaning
plug-and-play for customers immediately after unboxing. Furthermore, a unified firmware and
auto-p template that applies to all T4S phone models (T41S, T42S, T46S and T48S), saves even
more time and costs for businesses, as well as simplifies the management and maintenance.

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