2N Wireless 3G router 2N EasyRoute_new design - User manual, 1670 v1.06 - Manual (Page 98)

List of Abbreviations 6.3
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6.3 List of Abbreviations
 APN (Access Point Name)
Necessary for the GPRS service.
 CLIP (Calling Line Identification Presentation)
 CSD (Circuit Switched Data)
 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 GSM networks.
 HW (Hardware)
An electronic device, circuit, board, component, etc. in this context.
 PC (Personal Computer)
A personal computer based on the IBM PC standard.
 PIN (Personal Identification Number)
A SIM card securing password.
 PUK (Personal Unblocking Key)
A password used for releasing a blocked SIM card after repeated wrong PIN
entering.
 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).
 TTL (Transistor-Transistor Logic)
A standard digital technology defining voltage for levels 0 and 1.
 PSTN
Public Switched Telephone Network.
 LEC (Line Echo Canceller)
An echo cancelling function during calls.