US Robotics COURIER Instrukcja Użytkownika Pobierz pdf (Strona 280)

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101

U.S. Robotics I-modem Command Reference

Glossary • Page G-22

handshaking

A sequence that two modems undertake while connecting to agree on the parameters of

the conversation that will ensue. During handshaking, the modems negotiate the speed of

the connection, whether error control and data compression will be used and in what form,

and so forth.

hardware ßow control

A form of ßow control that uses electronic signals to start and stop the ßow of data.

HDLC

See High-Level Data Link Control.

High-Level Data Link Control (HDLC)

A standard protocol devel-oped by the International Standards Organization for soft-ware

appli-cations and communicating devices operating in synchronous

environments. The

protocol deÞnes oper-ations at the link level of communications (for example, the format

of data frames exchanged between modems over a phone line). See BISYNC

, protocol,

SDLC

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