Camera
Rear camera
Design
Product type	IP Phone
Handset type	Wireless handset
Product colour	Grey
Mounting	Desk/Wall
Device lock
Wall mountable
Display
Display	LCD
Display diagonal	6.86 cm (2.7")
Display resolution	192 x 68 pixels
Management features
Number of programmable keys	6
Number of function keys	5
Integrated voicemail
Network
Ethernet LAN interface type	Gigabit Ethernet
Supported network protocols	IPv4/IPv6, SIP v1 (RFC2543), v2 (RFC3261), UDP/TCP/DNS-SRV (RFC 3263)
Security algorithms	256-bit AES, HTTPS, TLS, WPA2, WPA3
Networking standards	IEEE 802.11a, IEEE 802.11b, IEEE 802.11g, IEEE 802.11n, IEEE 802.1x, IEEE 802.3af
Ethernet LAN
Wi-Fi
Bluetooth
Quality of Service (QoS) support
Operational conditions
Operating temperature (T-T)	-10 - 50 °C
Operating relative humidity (H-H)	10 - 95%
Packaging content
Number of handles included	1 pc(s)
AC adapter included
Phone features
Phonebook capacity	1000 entries
Number of VoIP accounts	12
Redialing
Caller ID
Call waiting
Distinctive ring
Speed dialling
Call hold
Call forwarding
Conference call
Do not disturb function
Call park
Call pick up
Anonymous call
Anonymous call rejection
Full duplex
Direct call
Call transfer
Call history
Ports & interfaces
USB 2.0 ports quantity	2
Ethernet LAN (RJ-45) ports	2
RJ-9 ports quantity	2
Power
Power consumption (typical)	2.2 W
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	63 kg

The SIP-T42U IP Phone is a feature-rich business tool for excellent communication and advanced functionality. This 12-line IP phone features numerous built-in programmable buttons for improved productivity. With Yealink Optima HD Voice technology and Opus wideband codec, the T42U offers excellent audio quality and crystal-clear voice communication. The phone feels faster and more responsive when making calls. In addition, the T42U has two USB ports on one phone, enabling Bluetooth, Wi-Fi, USB headset and USB recording functions, and you can use two of them according to your needs. Yealink's new T4U series offers the same elegant look and feel as the T4 series, but with improvements for greater interoperability and better collaboration.

Highlights

• Easy customization and high expandability
• The Yealink Optima HD Voice technology combines the latest hardware and software with broadband technology for maximum acoustic performance
• PoE support
• Up to 12 SIP accounts
• 2 USB ports, 2 Gigabit Ethernet ports and 2 RJ9 -Ports

Product type

• Corded end device
• Ear category (ElektroG): relevant, Category 6: small IT and telecommunications technology devices, Small IT and telecommunications technology devices B2C

Telephone properties

• Headset connectivity: USB
• Number of phone book entries: 1000

Connections

• USB
• Number of LAN ports: 2

Display

• Display diagonal inch: 2.7 \dlash- Display diagonal cm: 6.9 cm
• Display technology: LCD
• Display type: monochrome

Power supply

• PoE standard: PoE - 802.3af
• Power supply: optional
• PoE , Network

Basic features

• Color: Black
• Height: 175 mm
• Length/Depth: 189 mm
• Width: 212 mm

Scope of delivery

• Yealink SIP-T42U
• Telephone handset with handset cable
• Ethernet cable
• Stand
• Quick guide