Yealink T42U

Well-Rounded SIP Phone

The SIP-T42U IP phone is a feature-rich business tool for excellent communications and extended functionality. Integrated with Hall Switch, T42U gives you a quieter operation and environment. Coming with plentiful built-in programmable keys, this 12-line IP phone guarantees the enhanced productivity. United Yealink Optima HD Voice technology, 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. The T4U series better builds the Yealink ecosystem and is compatible with more Yealink headsets, supporting intelligent channel switching and using the phone to configure and upgrade headset. 

Features :

• 2.7" 192x64-pixel graphical LCD with backlight

• Dual USB ports

• Dual firmware images

• 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/BT52

• Stand with 2 adjustable angles

• Wall mountable

• Handset with hall switch

Specifications :

Audio Features

• HD voice: HD handset, HD speaker 

• Hearing aid compatible (HAC) handset 

• Acoustic Shield 

• Wideband codec: AMR-WB (optional), Opus, G.722 

• Narrowband codec: AMR-NB (optional), Opus, G.711(A/µ), G.723.1, G.729AB, G.726, iLBC 

• DTMF: In-band, Out-of-band(RFC 2833) and SIP INFO 

• Full-duplex hands-free speakerphone with AEC 

• VAD, CNG, AEC, PLC, AJB, AGC

Phone Features

• 12 VoIP accounts 

• One-touch speed dial, redial

• Call forward, call waiting, call transfer, call hold

• Call return, group listening, emergency call

• Mute, auto answer, DND, hoteline 

• 5-way conference call 

• Direct IP call without SIP proxy 

• Ring tone selection/import/delete 

• Set date time manually or automatically 

• Dial Plan, XML Browser, Action URL/URI

• RTCP-XR (RFC3611), VQ-RTCPXR (RFC6035) 

• Dual USB ports (2.0 compliant):

  - Bluetooth earphone through BT40/BT41

  - Contact synchronization through BT40/BT41

  - Wi-Fi through WF40/WF50

  - USB call recording through USB flash drive

  - USB headset

  - Wireless Headset Adapter EHS40 

• Enhanced DSS key

Directory

• Local phonebook up to 1000 entries

• Black list 

• XML/LDAP remote phonebook 

• Smart dialing

• Phonebook search/import/export

• Call history: dialed/received/missed/forwarded

IP-PBX Features

• Busy Lamp Field (BLF), Bridged Line Apperance (BLA) 

• Anonymous call, anonymous call rejection 

• Hot-desking, voice mail 

• Flexible seating, Executive and Assistant 

• Call park, call pickup 

• Centralised call recording 

• Visual voice mail 

• Call recording

Display and Indicator

• 2.7" 192x64-pixel graphical LCD with backlight

• LED for call and message waiting indication 

• Dual-colour (red or green) illuminated LEDs for line status information 

• Intuitive user interface with icons and soft keys 

• Multilingual user interface 

• Caller ID with name and number 

• Power saving

Feature keys

• 6 line keys with LED 

• 6 line keys can be programmed up to 15 paperless DSS keys (3-page view)

• 5 features keys: message, headset, mute, redial, hands-free speakerphone 

• 4 context-sensitive “soft” keys 

• 6 navigation keys 

• 2 volume control keys 

• Illuminated mute key 

• Illuminated headset key 

• Illuminated hands-free speakerphone key

Interface

• 2 x RJ45 10/100/1000M Ethernet ports 

• Power over Ethernet (IEEE 802.3af), Class 2 

• 2 x USB port (2.0 compliant) 

• 1 x RJ9 (4P4C) handset port 

• 1 x RJ9 (4P4C) headset port

Other Physical Features

• Colour: Classic Grey

• Stand with 2 adjustable angles

• Wall mountable

• External Yealink AC adapter (optional): AC 100~240V input and DC 5V/1.2A output

• USB output currency: 5V 500mA

• Power consumption (PSU): 0.9-2.2W

• Power consumption (PoE): 1.3-2.9W

• Dimension (W*D*H*T): 212mm*189mm*175mm*54mm

• Operating humidity: 10~95%

• Operating temperature: -10~50°C (+14~122°F)

Management

• Configuration: browser/phone/auto-provision 

• Auto provision via FTP/TFTP/HTTP/HTTPS for mass deploy

• Auto-provision with PnP 

• Broadsoft device management 

• Zero-sp-touch TR-069 

• Phone lock for personal privacy protection 

• Reset to factory, reboot 

• Package tracing export, system log

Network and Security

• SIP v1 (RFC2543), v2 (RFC3261)

• Call server redundancy supported

• NAT traversal: STUN mode

• Proxy mode and peer-to-peer SIP link mode

• IP assignment: static/DHCP

• HTTP/HTTPS web server

• Time and date synchronization using SNTP

• UDP/TCP/DNS-SRV(RFC 3263)

• QoS: 802.1p/Q tagging (VLAN), Layer 3 ToS DSCP

• SRTP for voice

• Transport Layer Security (TLS)

• HTTPS certificate manager

• AES encryption for configuration file

• Digest authentication

• OpenVPN, IEEE802.1X

• IPv6

• LLDP/CDP/DHCP VLAN

• ICE

Package Content

• Yealink SIP-T42U IP phone

• Handset with handset cord

• Ethernet Cable (2m CAT5E UTP Cable)

• Stand

• Quick Start Guide

• Power Adapter (Optional)

• Wall Mount Bracket (Optional)

Datasheet