User`s manual
U.S. Robotics I-modem Command Reference
Glossary • Page G-37
S
SDLC
See Synchronous Data Link Control.
S/T-interface
The name given to the signaling interface between an NT-1 and a terminal adapter or an
ISDN terminal.
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 IBM-com-
patible PCs, 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 sequential transfer of data characters, one bit at a time, using a single electrical path.
Also see parallel transmission
.