Installation Guide

156 90000-508 iv Dataradio G3 Installation Guide
Definitions
The following terms are used throughout this document.
Item
Definition
DCE Data Communications Equipment. This designation defines the direction (input
or output) of the various RS-232 interface signals. Modems are always wired as
DCE.
DTE Data Terminal Equipment. This designation defines the direction (input or out-
put) of the various RS-232 interface signals. Most user equipment, as well as
PCs, are wired as DTE.
GCU G3 modem Control Unit board
HDX Half Duplex. A unit that uses separate transmit and receive frequencies, but
which may not transmit and receive simultaneously.
RJ45 Industry–standard interface for data transfer.
RS-232 Industry–standard interface for data transfer.
USB Industry–standard interface for data transfer.