TRENDnet TFM 561U - fax | TRE-TFM-561U

The 56K USB Phone/Internet/Fax Modem, model TFM-561U, 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.
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.