SECTION 3
DEFINITIONS
3-1
001-4006-101
Term Definition
Bit Dribble Extraneous bits delivered at the end of a data transmission. Equivalent to a “squelch tail”
in voice systems.
DCE Data Communications Equipment This designation defines the direction (input or output)
of the various RS-232C interface signals. Modems are always wired as DCE. See also
DTE
DTE Data Terminal Equipment. This designation defines the direction (input or output) of the
various RS-232C interface signals. Most telemetry and SCADA equipment as well as PCs
are wired as DTE. See also DCE
Field Programming Field Programming Software. This software provides for configuration and testing of the
Software T-96S and T-96SR.
HDX Half Duplex - A unit which uses separate transmit and receive frequencies but which may
not transmit and receive simultaneously.
PLC Programmable Logic Controller. An intelligent device that can make decisions, gather and
report information, and control other devices.
RS-232 Industry-standard interface for low speed data transfer (EIA-RS-232E).
RTS Request to Send. An RS-232C signal used by most SCADA equipment to initiate a data
transmission.
RTU Remote Terminal Unit. A SCADA device used to gather information control
other devices.
SCADA Supervisory Control and Data Acquisition. A general term referring to systems that
gather data and/or perform control operations.
Simplex A unit which uses the same frequency for transmit and receive.
Transparent A transparent unit transmits all data without regard to special characters, etc.
T-96SR Enhanced version of the DRL T-96S Wireless Modem. The T-96SR is capable
of 19200 b/s in full channel radio and 9600 b/s in half channel radio models. FCC
refarming compliant.
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