USB-T4K

https://www.yealink.com/

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

Hardware:

• 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