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full duplex
communications
half duplex
modem
simplex

Refers to the transmission of data in two directions simultaneously. For example, a telephone is a full-duplex device because both parties can talk at once. In contrast, a walkie-talkie is a half-duplex device because only one party can transmit at a time.

Most modems have a switch that lets you choose between full-duplex and half-duplex modes. The choice depends on which communications program you are running.

In full-duplex mode, data you transmit does not appear on your screen until it has been received and sent back by the other party. This enables you to validate that the data has been accurately transmitted. If your display screen shows two of each character, it probably means that your modem is set to half-duplex mode when it should be in full-duplex mode.



For internet.com pages about full duplex, . Also, check out the following links!


More Information

  FreeTel product page
FreeTel provides real-time full-duplex voice communication via the Internet. This site offers product information, as well as a download link.

  Full duplex Internet phone
This site compares half duplex and full duplex for Internet telephone applications.

  Kalpana Etherswitch product page
Offers product information on the Kalpana Etherswitch EPS-2015RS, a stackable 15-port Ethernet switch which features full duplex ethernet communications capabilities. Updated on Aug 5, 1998

  Konftel company page
Presents general information about Konftel, the world's first company to commercially launch true full duplex technology, and one of its products, Konftel4, one of the world's most advanced teleconferencing systems. Updated on Dec 21, 1997

  Speak Freely for Windows
Speak Freely is a Windows application that allows you to talk over a network. This page describes the half duplex vs. full duplex capabilities of this product.

  TURBOstor - Full duplex product
Presents information on TURBOstor HF-800P, an advanced full duplex high speed, high storage capacity interface for sophisticated computer systems.

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