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Modems

Modems are devices that modulate an analog carrier signal to encode digital information.

Contributors in Modems

Modems

V.110

Network hardware; Modems

V.110 is a fixed-frame rate adaption that subdivides the ISDN channel into a single speed data channel.

V.120

Network hardware; Modems

V.120 allows one B-channel to carry multiple subrate channels in a succession of statistically multiplexed frames.

V.17 Fax

Network hardware; Modems

An ITU-T standard for making facsimile connexions at 14,400 bps, 12,000 bps, 9,600 bps, and 7,200 bps.

V.21

Network hardware; Modems

An ITU-T standard for modems operating in asynchronous mode at speeds up to 300 bps, full-duplex, on public switched telephone networks.

V.22

Network hardware; Modems

An ITU-T standard for modem communications at 1,200 bps, compatible with the Bell 212A standard observed in the U.S. and Canada.

V.22 bis

Network hardware; Modems

An ITU-T standard for modem communications at 2,400 bps. The standard includes an automatic link negotiation fallback to 1,200 bps and compatibility with Bell 212A/V.22 modems.

V.27 ter

Network hardware; Modems

An ITU-T standard for facsimile operations that specifies modulation at 4,800 bps, with fallback to 2,400 bps.

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