2N 4G wireless router 2N SpeedRoute - User manual, 1898 v1.02 - 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.