3Com 1.024.1644-00 Serial transmission, Start/stop bits, Terminal mode, Throughput, 17 Fax

Glossary

ROM

Read Only Memory is permanent memory, which is not user- programmable.

serial transmission

The consecutive flow of data in a single channel. Compare to parallel transmissions where data flows simultaneously in multiple channels.

start/stop bits

These signalling bits attached to a character before and after the character is transmitted during asynchronous transmission.

terminal

A device whose keyboard and display are used for sending and receiving data over a communications link. This device differs from a microcomputer or a mainframe in that it has little or no internal processing capabilities.

terminal mode

A software mode that allows direct communication with the modem. This is also known as command mode.

throughput

The amount of actual user data transmitted per second without the overhead of protocol information such as start/stop bits or frame headers and trailers. Compare it with characters per second.

V.8

The ITU-T standard specification that covers the initial handshaking process.

V.17 Fax

An ITU-Tstandard for making facsimile connections at 14400 bps, 12000 bps, 9600 bps, and 7200 bps.

V.21

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

56K Voice Faxmodem Internal - User’s Guide 49