Appendix B. Technical specifications
This section contains the technical specifications for the IBM V.90 Data/Fax
Modem.
Data modem function
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Full duplex transmission
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Asynchronous communication data mode
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ITU-T V.90, K56flex, V.34(33.6 Kbps), V.32bis, V.32, V.22 bis, V.22 V.23 and
V.21; Bell 212A and 103
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V.42 LAPM and MNP 2-4 error correction
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V.42 bis and MNP 5 data compression
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V.25 ter (Annex A) and EIA/TIA 602 command set
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Data Length: 10 bits, including start, stop, parity
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Modulation Format
– V.34 TCM at 2400/2800/3000/3429 baud
– V.32bis, 128 points TCM at 2400 baud
– V.22bis, 16 points QAM at 600 baud
– V.22 and 212A, 4 points PSK at 600 baud
– V.23, V.21 and 103, binary phase coherent FSK
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Transmit Level less than -11 dBm
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Guard Tone: 550 20 Hz Or 1800 20 Hz
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Answer Tone: CCITT (2100 Hz 15 Hz) or BELL (2225 Hz 10 Hz)
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Receive Sensitivity: (V.34) -34dBm
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Carrier Response Level: -42 dBm
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Data Format
– 1 Start bit, 7 data bit, even or odd parity, 1 stop bit.
– 1 Start bit, 7 data bit, no parity, 2 stop bit.
– 1 Start bit, 7 data bit, mark or space parity, 1 stop bit.
– 1 Start bit, 8 data bit, none parity, 1 stop bit.
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DTE to Modem Data Rate: Up to 300, 1200, 2400, 4800, 9600, 14400, 19200,
28800, 38400, 57600, 115200 bps.
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Normal Mode Line Data Rate: 300, 1200, 2400, 4800, 9600, 14400, 16800,
19200, 21600, 24000, 26400, 28800, 33600 ... 56000 and 1200/75 bps.
© Copyright IBM Corp. 2001
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