USB-T4K Brochure Download:

Key Features

  • 2-in-1 telephone: VoIP(Internet Telephone) and PSTN(Normal Telephone) in one.
  • Make or answer VoIP/PSTN calls easily by phone keypads.
  • Multi-channel call available.
  • Commercial grade speakerphone£¬ideal for conference calls.
  • LCD with backlight.
  • PSTN and VoIP calling history reviewable.
  • Phone rings for incoming calls, ring style and volume selectable
  • Echo cancellation, noise reduction, full duplex communication

Keypad function:

  • PSTN History: Display PSTN Call List
  • PC History: Display PC Call List
  • Mute: USB Call Mute Function
  • Contact: Display the contacts list
  • Hold: Call Hold Function
  • Del: Delete the Key Number and Call list
  • Digital keypads: 0-9
  • *+ : Input "*"
  • #: scroll ring style or input ¡°#¡±
  • PSTN Call: answer or make calls on PSTN
  • PC Call: answer or make calls on Skype
  • FLASH: PSTN Call Flash Function
  • REDIAL: PSTN Call Redial Function
  • Speaker: Press to active Handsfree Function


  • Driver and sound card built-in
  • PSTN Line LED indicator
  • Ports: USB port, PSTN port and Power Adaptor Jack

System Requirement:

  • Windows 2000, XP or Vista
  • 400MHz processor and free USB1.1 or USB2.0 port
  • 128MB RAM and 15MB free disk space
  • Any broadband connection or minimum 33.6 Kbps dialup


Created by: Yealink, Last modification: Thu 03 of Jan, 2008 (01:59 UTC)
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