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Glossary of Terms and Abbreviations

Term Explanation
4wire 1 physically separate 2-wire loop for each transmission direction - otherwise in full-duplex both transmission directions use the same physical 2-wire loop (as in modem)
<= less than or equal to
ANSI American National Standards Institute
asm assembler (as in code)
b/s bits per second (so kb/s is kilo-bits/sec)
Bell interoperability standards for modems prevalent in the USA - eg Bell 202
BER Bit Error Rate (or error rate, as in modem data transmission)
BW bandwidth
byte an 8-bit memory element
Caller ID Caller IDentification (as in telephone dialling)
CID
Error Rate for example "10-6 error rate" means 1 data bit in every 1000000 data bits in error on average (as in modem data transmission)
FFT Fast Fourier Transform
fixed-point use of integer arithmetic and program/data storage (as in fixed-point processor)
full-duplex transmission and reception in both directions simultaneously (as in modem)
half-duplex transmission or reception in one direction only at a time but capability of either (as in modem)
ITU International Telegraph Union: body which sets interoperability standards for eg telephone modems - V.xx designations - and speech/audio coders - G.xxx standards
k kilo
MIPS Millions-of-Instructions-per-Second: unit of DSP/micro-processor processing power
re-entrant the same routine call can be used to process multiple instances of a function
SNR Signal-to-Noise Ratio
word a 16-bit integer value or "short int" in C vernacular (as in program or data memory)

 
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