- APN (Access Point Name) – Necessary for the GPRS service.
- CLIP (Calling Line Identification Presentation)
- CSD (Circuit Switched Data)
- COM A PC Serial port.
- DTMF (Dual Tone MultiFrequency) – Tone dialling.
- FSK (Frequency Shift Keying) – A transmission protocol using variable signal frequencies for logic level encoding.
- FXO – An interface electrically identical with a standard telephone(opposite side = FXS interface).
- FXS – A telephone interface allowing a 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-day standard digital mobile telephone network.
- GPRS (General Packet Radio Service) – High-speed data transmission for UMTS/GSM networks.
- HW (Hardware) – An electronic device, circuit, board, component, etc. in this context.
- P(A)BX (Private (Automatic) Branch Exchange)
- PC (Personal Computer) – A personal computer based on the IBM PC standard.
- PIN (Personal Identification Number) – A SIM card securing password.
- PSTN – Public Switched Telephone Network.
- PUK (Personal Unblocking Key) – A password used for releasing 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 UMTS/GSM device for identification.
- SmG – 2N® SmartGate UMTS
- 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.
- UMTS (Universal Mobile Telecommunications System)
