MesCom
– Workshop Manual – D6000/i14/V10
© Dycon Ltd 2014
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15 Appendix 2 - Glossary of Terms
Bus master
The panel is the bus master for the RS485 bus
RS485
In this document this refers to the 2 wire signalling protocol used for the Galaxy
system bus
RS232
PC standard serial interface, legacy serial interface standard commonly used in
communication devices
IP
Internet Protocol
TCP
Transmission Control Protocol (correctly written TCP/IP as TCP sits on top of IP)
UDP
User Datagram Protocol (correctly written UDP/IP as UDP sits on top of IP)
SIM
Subscriber Identity Module, small card supplied by network operation that, when
connected to a radio module, allows the module to connect to the mobile network
GSM
Global System for Mobile communication (2G)
GPRS
General Packet Radio Service
EDGE
Extra Data-rates for Global Evolution
CSD
Circuit Switched Data
ADC
Analogue to Digital Convertor
SMA
Antenna connector
LED
Light Emitting Diode
SSN
SIM Serial Number (ICCID)
ICCID
Integrated Circuit Card Identifier
IMEI
International Mobile Equipment Identity
– used as serial number for the MesCom
UART
Universal Asynchronous Receiver/ Transmitter
PIN
Personal Identification Number, a means to prevent unauthorised use of a SIM
card
NVM
Non-Volatile Memory
IO
Input/output
NEC
manufacturer of microcontroller
LVI
Low Voltage detection module
TDMA
Time Division Multiple Access (technique used for GSM)
APN
Access Point Name
SMS
Short Message Service, a mobile phone text message
MBUS
Meter-BUS, low cost utility meter interface EN 13757
MODBUS
MODicon communication BUS, common interface for measurement and control
devices
EEPROM
Electronically Erasable Programmable Read Only Memory, a type of NVM
FET
Field Effect Transistor, an semiconductor switch device
SO
Standard Output can be used to refer to an open collector output used on utility
meters
ATM
Automatic Teller Machine, cashpoint
Optocouple
Semiconductor device used to isolate a signal, for either safety or electrical
reasons.
Back EMF
Reverse voltage (Electro Motive Force) generated when an inductive load is
switched off
USSD
Unstructured Supplementary Service Data, a protocol used by GSM networks to
communicate with the service providers computers.
For additional explanation please refer to the internet