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B Technical Specifications
127
Fax Modulation
V.21 CH2 FSK at 300 bps (half duplex)
V.27ter DPSK at 4800 and 2400 bps
V.29 QAM at 9600 and 7200 bps
V.17TCM at 14400, 12000, 9600, and 7200 bps
Carrier Frequencies
1600, 1646, 1680, 1800, 1829, 1867, 1920,
ITU-T V.34
1959, 2000 Hz
Carrier Frequencies
1800 Hz
AT&T V.32 terbo/
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