Yealink presents a dynamic business communication solution to executives and professionals with the new SIP-T48U IP phone. The phone employs and appealing large touch screen that makes the switch between pages and applications swift, easy and convenient. United Yealink Optima HD Voice technology and wideband codec of Opus, the T48U awards you the superb audio quality and crystal-clear voice communications. Moreover, the T48U 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.

Warranties - Returns:
Money Return:	Repair - Replacement:
20 days	24 months

Specifications
Audio Features	• HD voice: HD handset, HD speaker • Hearing aid compatible (HAC) handset • Acoustic Shield • Codecs: AMR-WB (optional), AMR-NB (optional), Opus, G.722, 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	• 16 VoIP accounts • Call hold, mute, DND • One-touch speed dial, hotline • Call forward, call waiting, call transfer • Group listening, emergency call • Redial, call return, auto answer • 3-way conferencing • 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) • USB port (2.0 compliant) for: - Bluetooth earphone through BT40/BT41 - Contact synchronization through BT40/BT41 - Wi-Fi through WF40/WF50 - USB call recording through USB flash drive - USB headset - Expansion Module EXP43 - 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 • Centralized call recording, call recording • Visual voice mail
Display and Indicator	• 7" 800 x 480-pixel color touch screen with backlight • 24 bit depth color • LED for call and message waiting indication • Wallpaper • Intuitive user interface with icons and soft keys • Multilingual user interface • Caller ID with name, number and photo • Screensaver • Power saving
Feature keys	• 29 one-touch DSS keys • 7 features keys: message, headset, hold, mute, transfer, redial, hands-free speakerphone • 6 navigation keys • Volume control keys • Illuminated mute key • Illuminated headset key • Illuminated hands-free speakerphone key
Interface	• Dual-port Gigabit Ethernet • Power over Ethernet (IEEE 802.3af), class 3 • 2 x USB port (2.0 compliant) • 1 x RJ9 (4P4C) handset port • 1 x RJ9 (4P4C) headset port
Other Physical Features	• Color: Classic Grey • Wall mountable (optional) • External Yealink AC adapter (optional): AC 100~240V input and DC 5V/2A output • USB output currency: 5V 1A • Power consumption (PSU): 1.8-3.8W • Power consumption (PoE): 2.3-4.7W • Dimension (WDHT): 266mm226mm185mm54mm • Operating humidity: 10~95% • Operating temperature: 0~40°C (+32~104°F)
Management	• Configuration: browser/phone/auto-provision • Auto provision via FTP/TFTP/HTTP/HTTPS for mass deploy • Auto-provision with PnP • 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-T48U IP phone Handset with handset cord Ethernet Cable (2m CAT5E UTP Cable) Stand Quick Start Guide Power Adapter (Not included) Wall Mount Bracket (Optional)