COURIER HIGH SPEED MODEMS
Protocol
A system of rules and procedures governing communications between two or more devices. Protocols vary, but communi- cating devices must follow the same protocol in order to exchange data. The format of the data, readiness to receive or send, error detection and error correction are some of the opera- tions that may be defined in protocols.
RAM
Random Access Memory. Memory that is available for use when the modem is turned on, but that clears of all information when the power is turned off. The modem's RAM holds the current operational settings, a flow control buffer, and a command buffer.
Remote Access
A feature that allows a
Remote Digital Loopback
A test that checks the phone link and a remote modem's trans- mitter and receiver. Data entered from the keyboard is trans- mitted from the initiating modem, received by the remote modem's receiver, looped through its transmitter, and returned to the local screen for verification.
Remote Echo
A copy of the data received by the remote system, returned to the sending system and displayed on the screen. Remote echo- ing is a function of the remote system.
ROM
Read Only Memory. Permanent memory, not
Serial Transmission
The transfer of data characters one bit at a time, sequentially, using a single electrical path. See Parallel Transmission.
Glossary
