US Robotics x2/56K Instructions d'exploitation télécharger pdf (Page 98)

GLOSSARY

fax mode

The mode used by a modem to send and

receive data in facsimile format. See

definitions for V.17, V.27ter, V.29.

flow control

A mechanism that compensates for differences

in the flow of data into and out of a modem or

other device. See commands &Hn, &In, &Rn.

frame

A data communications term for a block of

data with header and trailer information

attached. The added information usually

includes a frame number, block size data,

error-check codes, and Start/End indicators.

full duplex

Signals can flow in both directions at the same

time over one line. In microcomputer

communications, may refer to the suppression

of the online local echo.

half duplex

Signals can flow in both directions, but only

one way at a time. In microcomputer

communications, may refer to activation of the

online local echo, which causes the modem to

send a copy of the transmitted data to the

screen of the sending computer.

Hertz, a frequency measurement unit used

internationally to indicate cycles per second.

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US Robotics x2/56K Instructions d'exploitation Page 98