User's Manual

Gl-2 Glossary
C
CBS (Communication Base Station)
CBSs receive and transmit data and control functions between the
EPL controller and the SmarTalkers. Up to 20 CBSs can be installed
in a store. One CBS is defined as the primary CBS and the others as
secondary CBSs. CBSs are usually installed in the ceiling.
CBS Power Supply
This external AC/DC converter supplies DC power to a maximum
of five CBSs. An additional CBS Power Supply is required for each
additional group of 5 CBSs.
Coverage Area
An area within a store where there is reliable RF communication
between CBSs and SmarTalkers. More than one CBS is required in
a large store to attain adequate transmission reliability.
D
Descriptor Symbols
One symbol on a SmarTalker LCD indicates when the SmarTalker
and CBS are out of synchronization, and another symbol indicates
when the SmarTalker’s battery is low. The other symbols on the
display are available for the retailer’s use.
Downlink Burst
A CBS sends data to a SmarTalker in downlink bursts. A downlink
burst contains 132 bits. Examples of downlink messages are
Bedcheck, Price Update, Load Memory, and Change Display
Register.
DPC (Dedicated Personal Computer)
This PC, acting as the EPL controller, reads the customer’s PLU file
from the In-Store Processor/POS system via a LAN connection and
communicates the information to DecisioNet System.