Introduction

Sound and Hear with Remarkable Clarity

Yealink Optima HD Voice technology combines cutting-edge hardware and software with wideband technology for maximum acoustic performance.

Efficient Deployment and Management

Yealink T4U series supports effortless mass deployment and Zero Touch Provisioning with Yealink's Redirection and Provisioning Service (RPS) and Boot mechanism, making the device management labor-saving and efficient for the administrators.

Dual USB Ports for Flexible Expansion Choices
Bluetooth/Wi-Fi/Wireless Headset Dongles
With the optional USB dongles, the T42U can be enabled of the features including Bluetooth and Wi-Fi or connecting to a compatible wireless headset.

Design

Product type

IP Phone

Handset type

Wired handset

Product colour

Grey

Device lock

Y

Wall mountable

Y

Mounting

Desk/Wall

Phone features

Distinctive ring

Y

Speed dialling

Y

Call hold

Y

Call forwarding

Y

Conference call

Y

Redialing

Y

Caller ID

Y

Phonebook capacity

100 entries

Direct call

Y

Number of VoIP accounts

12

Call transfer

Y

Call history

Y

Management features

Integrated voicemail

N

Number of programmable keys

6

Number of function keys

5

Display

Display

LCD

Display diagonal

6.86 cm (2.7")

Display resolution

192 x 68 pixels

Audio

Microphone mute

Y

Network

Ethernet LAN

Y

Wi-Fi

Y

Bluetooth

Y

Security algorithms

HTTPS

Ports & interfaces

USB 2.0 ports quantity

2

Ethernet LAN (RJ-45) ports

2

RJ-9 ports quantity

2

Power

AC adapter input voltage

100 - 240 V

Input frequency

50/60 Hz

AC adapter output voltage

5 V

AC adapter output current

1.2 A

Power consumption (typical)

2.2 W

Operational conditions

Operating temperature (T-T)

-10 - 50 °C

Operating relative humidity (H-H)

10 - 95%

Weight & dimensions

Width

212 mm

Depth

189 mm

Height

175 mm

Package width

627 mm

Package depth

256 mm

Package height

235 mm

Package weight

6.3 g