7.2 List of Abbreviations
List of Abbreviations in the document:
APN – Access Point Name – necessary for the GPRS service
CLIP – Calling Line Identification Presentation
CSD – Circuit Switched Data
COM PC serial port–
DTMF Dual Tone Multi Frequency – tone dialling–
EG StarGate/BlueTower–
ESME – External Short Messaging Entity
FSK Frequency Shift Keying–
FXO an interface electrically identical with a standard telephone (opposite side–
= FXS interface)
FXS a telephone interface allowing standard telephone connection (opposite–
side = FXO interface)
FW Firmware – similar to SW, a term for the central microprocessor program–
GSM Group Switched Mobile system – the present standard digital mobile–
telephone network
GPRS General Packet Radio Service – high–speed data transmission for GSM–
networks
HW Hardware – an electronic device, circuit, board, component, etc. in this–
context
P(A)BX Private (Automatic) Branch Exchange–
PC Personal Computer (based on the IBM PC standard)–
PIN Personal Identification Number – a SIM card securing password–
POP3 – Post Office Protocol v3
PUK Personal Unblocking Key – a password used to unblock a blocked SIM card–
after repeated wrong PIN entering
RS-232C a PC serial port standard–
SIM Subscriber Identity Module – a chip-equipped module to be inserted in a–
GSM device for identification
SMPP – Short Message Peer to Peer
– SMSC Short message service center
SMTP – Simple Mail Transfer Protocol
SMS Short Message Service, a term for the system and one unit (message)–
SW Software–
TTL Transistor-Transistor Logic – a standard digital technology defining voltage–
for levels 0 and 1
PSTN Public Switched Telephone Network–
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