half-duplex modem

См. также в других словарях:

• Modem — For other uses, see Modem (disambiguation). A modem (modulator demodulator) is a device that modulates an analog carrier signal to encode digital information, and also demodulates such a carrier signal to decode the transmitted information. The… …   Wikipedia

• modem — /moh deuhm, dem/, Computers. n. 1. an electronic device that makes possible the transmission of data to or from a computer via telephone or other communication lines. v.t. 2. to send or receive (information, data, or the like) via a modem.… …   Universalium

• Duplex (telecommunications) — A duplex communication system is a system composed of two connected parties or devices that can communicate with one another in both directions. The term multiplexing is used when describing communication between more than two parties or devices …   Wikipedia

• Modem standards — The CCITT, an international committee that specifies the way modems and fax machines transmit information to ensure compatibility among modems, has classified dial up modems according to the following modulation standards:* Bell 103M 212A: Older… …   Wikipedia

• Modem Bell 202 — Le modem Bell 202 est l un des premiers modèles de modems, développé par AT T. Il utilise une modulation de type audio FSK (AFSK) pour transmettre ses données à 1200 bits par seconde en half duplex. D autres modems utilisent le même type de… …   Wikipédia en Français

• Voiceband modem operating standards — ▪ Table Voiceband modem operating standards ITU T standard transmission rate modulation method transmission mode V.27ter 4.8 kbps PSK half duplex V.29 9.6 kbps QAM half duplex V.17 14.4 kbps QAM/TCM half duplex V.21 300 bps FSK full duplex V.22 1 …   Universalium

• List of modem standards — The CCITT, an international committee that specifies the way modems and fax machines transmit information to ensure compatibility among modems, has classified dial up modems according to the following modulation standards: Bell 103M 212A: Older… …   Wikipedia

• Bell 202 modem — The Bell 202 modem was an early modem developed by AT T. It used audio frequency shift keying to encode and transfer data at a rate of 1,200 bits per second, half duplex (one way). Other third party modems that support the same signalling and are …   Wikipedia

• ITU-T V-Series Recommendations — V90 redirects here. For the automobile, see Volvo V90. The ITU T V Series Recommendations on Data communication over the telephone network specify the protocols that govern approved modem communication standards and interfaces.cite web… …   Wikipedia

• Telebit — was a US based modem manufacturer, most notable for their TrailBlazer series of high speed modems. One of the first modems to routinely exceed 9600 bit/s speeds, the TrailBlazer used a proprietary modulation scheme that proved highly resilient to …   Wikipedia

• Novation CAT — The original Novation CAT Novation was an early modem manufacturer whose CAT series were popular in the early home computer market in the late 1970s and early 1980s, notably on the Apple II. The Hayes Smartmodem 300, introduced in 1981, helped… …   Wikipedia