User`s guide

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into the radio. The user will hear only those transmissions encrypted
with his or her radio’s individual key.
Quik-Call II A two-tone sequential tone signalling system or format typically used
in portable and paging products.
RAM Random Access Memory. Used by the computer to store the program
it is executing. The radio’s RAM is loaded with a copy of the EEPROM
data. The program will sometimes write to the radio’s RAM to
temporarily change certain features such that the user can get
immediate feedback. These changes will not become permanent in the
radio’s codeplug until the radio is programmed.
RAT1 & RAT2 Repeater Access Tones 1 and 2. A hardware control on the side of the
radio that lets the user access a repeater.
RIB See “Radio Interface Box”.
RPT/TA Repeater/Talkaround.
RS-232 An asynchronous, serial data transmission standard for computers
that defines the required sequencing, timing and hardware interface.
RSS See “Radio Service Software”.
RSSI Received Signal Strength Indicator. A DC voltage proportional to
received signal strength. On some radio models, there is a visual
indication of the received signal.
Radio Check A feature that allows a dispatcher to discreetly poll a radio to
determine whether it is on the air and within range. An MDC-1200
data packet is sent to the target radio and if the radio is on the channel,
it will acknowledge the Radio Check. The user will receive no
indication of the poll except perhaps a brief lighting of the transmit or
busy light.
Radio Interface Box (RIB) Hardware used to connect a computer system to a radio for the
purpose of communication between the radio and the computer. The
RIB consists of level-shifting circuits that convert the standard RS-232
voltage levels of the computer to the single-ended voltage levels
present on the Serial Bus contacts of the radio’s feature connector. An
appropriate RIB-to-radio cable and RIB-to-computer cable must be
used in conjunction with the RIB to program a radio.
Radio Interface Cable A cable that allows the radio to be connected to or interfaced with a
host computer for programming or tuning purposes.
Radio Service Software (RSS) Licensed software for use by Motorola product resellers delivered on a
3-1/2” diskette(s) and used to program two-way radios with a unique
set of features called personalities.
Random Access Memory See “RAM”.
RapidCall A method of signalling designed by Motorola Radius Products. This
signalling method may include both industry standard and Motorola-
proprietary formats, but utilizes common ergonomics and features for
each.