
26
10. List of Abbreviations
•
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 Multifrequency - tone dialing
•
EG
-
EasyGate
•
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
•
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
•
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
Summary of Contents for EasyGate
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