User Manual, v1.00 Instruction Manual

10. List of Abbreviations

• CLIP - Calling Line Identification Presentation

• COM - PC serial port

• DTMF - Dual Tone Multifrequency - tone dialing

• EG - EasyGate UMTS Data

• 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 - USIMilar to SW, a term for the central microprocessor program

• GSM - Group Switched Mobile system - the present standard digital mobile telephone

network

• 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 USIM card securing password

• PSTN - Public Switched Telephone Network

• PUK - Personal Unblocking Key - a password used to unblock a blocked USIM

card after repeated wrong PIN entering

• RS-232C - a PC serial port standard

• USIM - Subscriber Identity Module - a chip-equipped module to be inserted in a

UMTS 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

• USB - Universal Serial Bus, PC port