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17: The standard for 14,airtouch keyboard driver download bps full-duplex FAX transmissions across standard dialup telephone lines. 21: The standard for full-duplex communication at 300 baud in Japan and Europe. In the United States, Bell 103 is used in place of V. 22: The standard for half-duplex communication at 1,200 bps in Japan and Europe.

In the United States, the protocol defined by Bell 212A is more common. 22bis: The worldwide standard for full-duplex modems sending and receiving data across telephone lines at 1,200 or 2,400 bps. 27bis: The worldwide standard for half-duplex modems sending and receiving data across 4-wire telephone lines at 4,800 bps. 27ter: The worldwide standard for full-duplex modems sending and receiving data across telephone lines at 4,800 bps. 29: The standard for half-duplex modems sending and receiving data across 4-wire telephone lines at 1,200, 2,400, 4,800, or 9,600 bps.

This is the protocol used by FAX modems. 32: The standard for full-duplex modems sending and receiving data across phone lines at 4,800 or 9,600 bps. 32 modems automatically adjust their transmission speeds based on the quality of the lines. 32 protocol extended to speeds of 7,200, 12,000, and 14,400 bps. 32 protocol extended to speeds of 19,200 bps. 34: The standard for full-duplex modems sending and receiving data across phone lines at up to 28,800 bps. 34 modems automatically adjust their transmission speeds based on the quality of the lines.

42: An error-detection standard for high-speed modems. 42 can be used with digital telephone networks. See MNP for a competing standard. 42bis: A data compression protocol that can enable modems to achieve a data transfer rate of 34,000 bps. 44: A data compression protocol, used on some V.

92 modems, that can enable modems to achieve a data transfer rates of about 56,000 bps. 90 standard resolves the battle between the two competing 56 Kbps technologies, X2 from 3COM and K56FLEX from Rockwell Semiconductor. 92: This is an enhancement to the V. This specification introduces three new features that will add convenience and performance for the modem user. The quick connect feature of a V. The main feature that makes a V.