300 BPS AC-4 Acoustic Modem (260-1179) Specifications Faxback Doc. # 5694 COMPATIBILITY: RECEIVER SENSITIVITY: -3 to -42 dBm MODEM: Bell 103 TRANSMIT LEVEL: -5 dBm +/-5 dBm DIALER: Manual TONE DIAL LEVEL: None DATA RATES: 110, 150, 300 baud LINE IMPEDANCE: 600 ohms SPEED SELECT: Automatic RINGER EQUIVALENCE: 0.0 B CMD BUFFER: N/A MODULATION: SPEAKER: On 300 BAUD: Frequency Shift DATA FORMATS: Serial binary, Keyed (FSK) Asynchronous DIALING: None TESTING MODES: None (smm 08/26/93)