• Part of theT4 series - revolutionarily new design

• Yealink Optima HD voice for crystal clear audio

• Dual-port Gigabit Ethernet

• Sparkling 2.7"" 192 x 64 pixel graphical LCD display with backlight

• Up to 3 SIP accounts

• Paper label free design

• PoE support

• Headset and EHS

• simple, flexible and secure provisioing options

• Integrated stand with 2 adjustable viewing angles

• Wall mountable (Optional Wall Mount Bracket)

Audio Features

• HD voice: HD handset, HD speaker

• Codecs: G.722, G.711(A/µ), G.723, G.729AB, G.726, GSM

• 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

• 3 VoIP accounts

• Call hold, mute, DND

• One-touch speed dial, redial

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

• Group listening, call return

• Mute, auto answer, DND

• Call history: dialed/received/missed/forwarded

• 3-way confernecing

• Direct IP call without SIP proxy

• Ring tone selection/import/delete

• Hotline, emergency call

• Set date time manually or automatically

• Dial plan, XML Browser, action URL

Directory

• Local phonebook up to 1000 entries

• BroadSoft contacts: custom/enterprise/personal/common/search/speed dial

• Busy Lamp Field (BLF), BLF list

• Bridged Line Apperance(BLA)/SCA

• Anonymous call, Anonymous call rejection

• DND & forward synchronization

• BroadWorks Anywhere

• N-Way Calling, remote office

• Message Waiting Indicator (MWI)

• BroadSoft call center features

• Voice mail, call park, call pickup

• Intercom, paging, music on hold

• Call recording, hot-desking

Display and Indicator

• 2.7" 192 x 64-pixel 4-level grayscale graphical LCD display with backlight

• Caller ID with name, number

• LED for call and message waiting indication

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

• Intuitive user interface with icons and soft keys

Feature keys

• 6 line keys with LED

• 6 line keys can be programmed for up to 15 various features (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, headset and speakerphone key

Interface

• Dual-port Gigabit Ethernet

• 1xRJ9 (4P4C) handset port

• 1xRJ9 (4P4C) headset port

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

Other Physical Features

• Stand with 2 adjustable angles

• Wall mountable

          * External universal AC adapter (optional):

• AC 100-240V input and DC 5V/1.2A output

Management

• Configuration: browser/phone/auto-provision

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

• Auto-provision with PnP

• BroadSoft device management

• Zero-sp-touch

• Provisioning server redundancy supported

Network and Security

• SIP v1 (RFC2543), v2 (RFC3261)

• NAT transverse: 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 using MD5/MD5-sess

• OpenVPN, IEEE802.1X

• IPv6