| 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) |