Audio Features

• HD voice: HD handset, HD speaker

• Hearing aid compatible (HAC) handset

• Yealink Noise Proof Technology

• Audio codec: Opus, G.722, G.722.1, G.722.1C, G.711 (A/µ), G.723, G.726, G.729AB, 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

Video Features

• 720p@30fps HD video call

• Video codec: H.264 High Profile, H.264, VP8

• Video quality: 720P (1280x720)-30fps ( ≥ 512 kbps)

• Yealink CAM50 camera: 2 mega-pixel, plug and play, adjustable, with privacy shutter and LED indicator

• Vertical tilt angle adjustable: 50°

• Field of view (FOV): 70.2°

• Self view (local video preview)

Display and Indicator

• LCD screen:

 - 7" 1024 x 600 capacitive adjustable touch screen

 - Vertical tilt angle adjustable: 48°

• 5 points multi-touch surface

• Screensaver and Wallpaper

• LED for call and message waiting indication

• Intuitive user interface with icons and soft keys

• Multilingual user interface

• Caller ID with name, number and photo

Android bundled Applications

• FileManager/Email/Calendar/Camera/Gallery/Recorder/Calculator/Browser/Message

• Third party Android application support

Phone Features

• Yealink’s SDK (Software Development Kit)

• 16 VoIP accounts

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

• One-touch speed dial, hotline, mute, DND

• Group listening, emergency call

• Redial, call return, auto answer

• Direct IP call without SIP proxy

• Ring tone select/import/delete

• Set date time manually or automatically

• Dial plan, action URL/URI

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

• Three-party video conferencing

• Five-party audio/video mixed conferencing

• Data import/export via Bluetooth, email, etc.

• DoorPhone features: Preview, One-button Open, Monitoring

Corded-Cordless Phone (via DECT Dongle DD10K)

• Up to 4 DECT cordless handsets

• Up to 4 concurrent calls

• Support Yealink W52H/W53H (OTA pending)/W56H/DD Phone

• Slave Handset for Master Deskset

IP-PBX Features

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

• Anonymous call, anonymous call rejection

• Remote office, hot desking, intercom, paging, call completion

• Message Waiting Indicator (MWI)

• Voice mail, call park, call pickup, music on hold, call recording

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

Feature keys

• 27 one-touch DSS keys

• 8 feature keys: hold, transfer, message, headset, mute, redial, speakerphone, volume

• Illuminated mute/headset/hands-free speakerphone key

Interface

• Dual-port Gigabit Ethernet

• Power over Ethernet (IEEE 802.3af), class 3

• Built-in Wi-Fi (2.4GHz, 802.11b/g/n)

• Built-in Bluetooth 4.0+ EDR for

 - Bluetooth headsets

 - Pairing mobile devices

• 1 x USB 2.0 port (on the top of the phone) for:

 - Yealink CAM50 camera

• 1 x USB 2.0 port (on the rear of the phone) for:

 - USB flash drive

 - Wired/wireless USB headset

 - Color-screen expansion modules

• 1 x Security lock port

• 1 x RJ9 (4P4C) handset port

• 1 x RJ9 (4P4C) headset port

• Supports up to 3 color-screen expansion modules

Management

• Configuration: browser/phone/auto provision

• Auto provision via FTP/TFTP/HTTP/HTTPS

• Auto provision with PnP, Zero-sp-touch, TR-069

• Phone lock for personal privacy protection

• Reset to factory, reboot, package tracing export, system log

• T56A&T58A&T58V unified firmware and common.cfg file

• Only the administrator can install/uninstall apps via autop

• Setup Assistant wizard

Network and Security

• IPv4/IPv6

• 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/PPPoE

• 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

• Transport Layer Security (TLS)

• HTTPS certificate manager

• AES encryption for configuration file

• Adb encryption authenticated

• Digest authentication using MD5/MD5-sess

• OpenVPN, IEEE802.1X

Other Physical Features

• Color: Metallic Grey

• Wall mountable (optional)

• External Yealink AC adapter (optional): AC 100~240V input and DC 5V/2A output

• Power consumption (PSU): 1.9W-5.7W

• Power consumption (PoE): 2.6W-7.4W

• Dimension (W*D*H*T): 259.4mm*220mm*239mm*42.6mm

• Operating humidity: 10~95%

• Operating temperature: -10~40°C (+14~104°F)