Atari XM301 Owner's Manual page 44

APPENDIX B
XM301 MODEM SPECIFICATIONS
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• Modulation/Demodulation:
Frequency shift keying (standard Bell 103)
• Data Rate: 300 baud (bps)
• Data Interface: SIO
• Line Interface: Direct connect, FCC part 68 approved
• Carrier Indicator: LED
• Modem's Modular Telephone Jack: USOC RJ11C
• Telephone Dialing Method: Touch tone (DTMF) or Rotary (Pulse)
• Auto-Answer/Auto-dial Capability
• Audio Feedback: TV/Monitor Speaker
• Transmitter Frequency:
Originate
Mark 1270 Hz + /- .5%
Space 1070 Hz +/- .5%
Answer
Mark 2225 Hz + /- .5%
Space 2025 Hz +/- .5%
Transmit Level: -9.0 dBm to -16 dBm
• Receiver Frequency:
Originate
Mark 2225 + /- 30 Hz
Space 2025 +/- 30 Hz
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