Yealink SIP T48S

Yealink SIP T48S

The SIP-T48S IP Phone is a dynamic business communications solution for executives and professionals. This phone offers a large touch screen that makes switching between pages and applications swift, easy and convenient. The SIP-T48S is also with Yealink’s Optima HD Voice technology and wideband codec of Opus for unparalleled audio clarity. Phone users will think they are sitting in the same room with one another. The phone uses Gigabit Ethernet technology for rapid call handling. Plus, it works in conjunction with Bluetooth USB Dongle and Wi-Fi USB Dongle. The new T4S series offers the same elegant appearance of the T4 line, but with improvements for greater interoperability and collaboration.

Model #: T48S

  • Revolutionarily new design 
  • Yealink Optima HD voice 
  • Dual-port Gigabit Ethernet
  • PoE(802.3af) class support
  • 7″ 800 x 480-pixel color touch screen with backlight
  • Support Bluetooth headset through USB Dongle
  • Up to 16 SIP accounts
  • Paper label free design 
  • Headset, EHS support
  • Supports expansion modules
  • Wall mountable
  • Simple, flexible and secure provisioning options

Audio Features

  • HD Voice: HD handset, HD speaker
  • Codecs: G722,G711(a/u), G723, G723.1,G729AB, G726, 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, SMS, 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
  • Active URL/URI
  • RTCP-XR (RFC3611, VQ-RTCPXR, RFC6035)

Directory

  • Local phonebook up to 1000 entries
  • Black list
  • XML/LDAP remote phonebook
  • Smart Dialing
  • Intelligent search method
  • Phonebook search/import/export
  • Call history: dialed/received/missed/forwarded

IP-PBX

  • Busy Lamp Field (BLF)
  • Bridged Line Appearance (BLA)
  • Anonymous call, anonymous call rejection
  • Hot-desking
  • Message Waiting Indicator (MWI)
  • Voice mail
  • Call park, call pickup
  • Intercom, paging
  • Music on hold
  • Call completion
  • Call recording

Display & Indicators

  • 7″ 480-pixel color display 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
  • National language selection
  • Caller ID with name, number and photo
  • Call Timer

Feature Keys

  • 29 one-touch DSS keys
  • 7 feature 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
  • Built-in USP port, supports Bluetooth headset through USB Dongle
  • Power over Ethernet (IEEE 802.3af), Class 0
  • 1 x RJ9 (4P4C) handset port
  • 1 x RJ9 (4P4C) headset port
  • 1 x RJ12 (6P6C) EXT port: Supports up to 6 Expansion Modules for an attendant console application

Management

  • Configuration: browser/phone/auto-provision
  • Auto provision via FTP/TFTP/HTTP/HTTPS for mass deploy
  • Auto-provision with PnP
  • Reset to factory, reboot

Network & Security

  • SIP v1 (RFC2543), v2 (RFC3261)
  • Call server redundancy supported
  • NAT transverse: STUN mode
  • Proxy mode and peer-to-peer SIP link mode
  • IP assignment: static/DHCP/PPPoE
  • HTTP/HTTPS server
  • Time and date synchronization using SNTP
  • UDP/TCP/DNS-SRV(RFC3262)
  • 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

Other

  • Stand with 2 adjustable angles
  • Wall mountable
  • External universal AC adaptor (optional)
  • Dimensions (mm): 266W x 185D x 54H

Quick Start Guide: Yealink_SIP-T48S_Quick_Start_Guide_V82_20

User Guide: Yealink_SIP-T48S_User_Guide_V81_90

Datasheet: Yealink SIP-T48S Datasheet