300 DCM-1B Modem (260-1175) Features Faxback Doc. # 5828 The Modem 1B is a self-contained, FSK (Frequency Shift Keying) telephone interface. The Modem 1B is designed to let you originate and answer calls at 300 baud. The Modem 1B lets you use your computer, communications software, your telephone, and the telephone lines to send or receive programs or contact information services. The Modem 1B is designed to be used with Tandy TRS-80 computer or data terminal that has RS232-C interface capabilities. (smm/BKL-01/25/96)