3Com 56K manual Glossary

10GLOSSARY

Read-Only Memory Permanent memory, not user-programmable. The Business Modem's (ROM) factory settings are stored in ROM.

remote access A feature that allows a remotely-located user to view the Business Modem's configuration screens and change the Business Modem's configuration. Password protection is available.

remote digital A test that checks the phone link and a remote modem's transmitter loopback and receiver. Data entered from the keyboard is transmitted 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 echoing is a function of the remote system.

result code Another way of saying "status message." The Business Modem sends result codes to your terminal, for example, to indicate the status of a connection.

RJ11 The Universal Standard Order Code (USOC) standard for wiring a single-line, two-wire phone network interface, passing tip and ring signals, typically, from the public switched network.

ROM See Read-Only Memory.

Serial Line Internet A simple protocol that permits sending IP data over a serial line. SLIP is Protocol (SLIP) being superseded by the Point-to-Point Protocol (PPP).

serial port A computer port that enables the transmission of data characters one bit at a time, using a single electrical path. Also known as a communications port, or COM port. On PC-compatible machines, this is a port for asynchronous, serial data transmission and, in the case of modems, for data reception. Data is transmitted one bit at a time (serially) to devices such as a modem, a serial mouse, or a serial printer.

serial transmission The transfer of data characters one bit at a time, sequentially, using a

single electrical path. See Parallel Transmission.

software flow A form of flow control that uses XON and XOFF characters to start and control stop the flow of data.

start bit The signaling bit attached to the beginning of each character before characters are transmitted during Asynchronous Transmission.