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 using your regular telephone‎.‎