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Appendix B - Technical Specifications
Carrier Frequencies 1600, 1646, 1680, 1800, 1829, 1867, 1920,
ITU-T V.34 1959, 2000 Hz
Carrier Frequencies 1800 Hz
ITU-T V.32bis/V.32
Carrier Frequencies Transmit originate: 1200 Hz
V.22bis/V.22 or Transmit answer: 2400 Hz
Bell 212A Standard Receive originate: 2400 Hz
(2400 & 1200 bps) Receive answer: 1200 Hz
Carrier Frequencies Transmit originate: 390 Hz mark
ITU-T V.23 450 Hz space
(1200 bps) Receive originate: 1300 Hz mark
2100 Hz space
Transmit answer: 1300 Hz mark
2100 Hz space
Receive answer: 390 Hz mark
450 Hz space
Carrier Frequencies Transmit originate: 980 Hz mark
ITU-T V.21 1180 Hz space
(0–300 bps) Receive originate: 1650 Hz mark
1850 Hz space
Transmit answer: 1650 Hz mark
1850 Hz space
Receive answer: 980 Hz mark
1180 Hz space
Carrier Frequencies Transmit originate: 1270 Hz mark
Bell 103/113 1070 Hz space
(0–300 bps) Receive originate: 2225 Hz mark
2025 Hz space
Transmit answer: 2225 Hz mark
2025 Hz space
Receive answer: 1270 Hz mark
1070 Hz space
Fax Carrier V.21 Ch2 (half duplex):
Frequencies 1650 Hz mark, 1850 HZ space for transmit originate
1650 HZ mark, 1850 Hz space for transmit answer
V.27ter: 1800 Hz originate/answer
V.29 QAM: 1800 Hz originate/answer
V.17 TCM: 1800 Hz originate/answer
Transmit Level -11 dBm (dial-up)
Frequency Stability ±0.01%
Receiver Sensitivity -43 dBm under worst-case conditions
AGC Dynamic Range 43 dB
Connectors USB connector; two RJ-11 phone jacks
Cables One 7-foot RJ-11 phone cable
One 4-foot USB cable
Note: Any cables connected to the computer should be
shielded to reduce interference.