2N SmartGate - User Manual - Manual (Page 45)

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10. List of Abbreviations
· APN - Access Point Name – necessary for the GPRS service
· CLIP - Calling Line Identification Presentation
· CLI - Calling Line Identification
· CSD - Circuit Switched Data
· COM - PC serial port
· DTMF - Dual Tone Multifrequency - tone dialing
· SmG - SmartGate
· FSK - Frequency Shift Keying. Protocol for CLI transmission on telephone line.
· 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