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Abbreviations
ADN
Abbreviated Dialling Numbers
ALS
Alternate Line Service
AoC
Advice of Charge
CLI
Calling Line Identification
CSD
Circuit Switched Data
DTMF
Dual Tone Multi Frequency
EMS
Enhanced Message Service
FDN
Fixed Dialling Numbers
GPRS
General Packet Radio Service
GSM
Global System for Mobile communications
LCD
Liquid Crystal Display
LED
Light Emitting Diode
MMS
Multimedia Message Service
PIN
Personal Identification Number
PUK
Personal Unlocking Key
SDN
Service Dialling Numbers
SHF
Simple Hands Free kit
SIM
Subscriber Identity Module
SMS
Short Message Service