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.

Product Details

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

Physical Features

  • 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
  • National language selection
  • Caller ID with name, number and photo
  • 29 one-touch DSS keys
  • 7 features keys: message, headset, hold, mute, transfer, redial, hands-free speakerphone
  • USB 2.0

IP-PBX and BroadSoft Features

  • Busy Lamp Field (BLF)
  • Bridged Line Apperance(BLA)
  • Anonymous call, anonymous call rejection
  • Remote office, hot-desking
  • Message Waiting Indicator (MWI)
  • Voice mail, call park, call pickup
  • Intercom, paging, music on hold
  • Call completion, call recording
  • Executive and Assistant
  • Centralized call recording
  • Visual voice mail

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 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

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