Technical library

Dial-up modem series	Dial-up modem technology primer: from V.21 to V.92 V.22 - up to 1200 bps V.22bis - up to 2400 bps V.32/V.32bis - up to 9,600/14,400 bps V.34 - up to 33,600 bps
POS modem series	Modems misbehaving ^{Commonly encountered scenarios on legacy EftPos dial-up} Modem quirks found on EftPos networks ^{Minimising overall transaction time, FastConnect and FastPOS} EftPos SDLC protocol explained ^{Synchronous data link control on payment terminal networks}
Embedded series	Speeding up MDD FS on a Microchip dsPIC with SD card ^{In 4 parts: boosting SPI speed; using DMA; optimising read/write primitives; supporting SDHC cards}
DSP series	Optimizing spectral displays in C# ^{In 4 parts: FFT overview, FFT for real sequences; linear to decibel conversion; spectrogram drawing}

Related product: 3am LineScope dial-up analyzer