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TRENDnet 56K USB Phone/Internet/Fax Mode
Works fine with phonetray 3.0 on my Windows 8.1 OS. All I had to do was plug it into a usb port and it was automatically installed. I only use it for caller ID, so I can't verify using it for an internet connection or as a fax modem.
The TRENDnet 56K USB Phone/Internet/Fax Modem connects computers to the Internet using a dial up telephone connection. This compact modem offers advanced communications functionality, compatibility with Windows and Linux operating systems and compliance with most dial up Internet Service Provider networks.
Only one phone line is needed for both Internet access and telephone calls the NetWaiting feature screens incoming telephone calls while online and maintains an Internet connection when calls are answered using your regular telephone.
The modem is powered by the connected computer with no external power source required. Software features include a programmable telephone book with speed dial entries; a fax utility that supports scheduled and group faxes; and transmission and reception logbooks that record all activities.