Page 8CWT S5 Installation & Maintenance ManualIssue 5
Introduction
2. Exploded view drawings for each model
3. CWT User Interface Design Handbook
4. CWTC OS Update for CPU board version 0501-E0150.docx
5. Mounting of Top Hat
2.7 Terminology
The AVR is an 8-bit RISC single chip micro controller. The AVR
uses on-chip flash memory for program storage. See more about
AVR updates in the CWT Software Configuration Handbook.
Common term for all Cale WebTerminal models (CWT 2110,
CWT 2115, CWT 2120, CWT Compact Classic, CWT 104, CWT
104 S, CWT Compact all models).
Firmware is a computer program that is embedded in a hardware
device, for example a micro controller. Firmware is somewhere
between hardware and software. Like software, it is a computer
program which is executed by a computer. But it is also an
intimate and vital part of a piece of hardware and has little
meaning outside of that hardware.
General Packet Radio Service is a mobile data service available
to users of GSM (see below) based mobile phones and
modems. GPRS is packet-switched meaning that multiple users
share the same transmission channel, only transmitting when
they have data to send. Thus, the total available bandwidth can
be immediately dedicated to users who are actually sending at
any given moment, providing higher utilization where users only
send or receive data intermittently. Usually, GPRS data are
billed per kilobytes of information transferred.
The Global System for Mobile communications is the most
popular standard for mobile phones in the world. It includes
packet data capabilities by means of GPRS (see above).
Short for Magnetic stripe
Residual-current device
(RCD)
Also known as a ground fault circuit interrupter (GFCI), ground
fault interrupter (GFI) or an appliance leakage current interrupter
(ALCI). In Australia, they are sometimes known as "safety
switches". The device disconnects a circuit whenever it detects
that the electric current is not balanced between the live and the
neutral conductors. Such an imbalance is sometimes caused by
current leakage through the body of a person who is grounded
and accidentally touching the energized part of the circuit.
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