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modulation in dial up

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mehdi_an

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hi all
i want know that in line phone dial up which modulation use ?
 

Are u talking abt dial-up modem ? Many, depending on bps & protocol. Starting Simple FSK, BPSK to complex QPSK, QAM-16 or 256
 

Actually i don't know exactly but if you want to know review the
dial up modem names / standards like V34 , V90 , V92

and read this ITU standards well to know what type of modulation
is used


Tamer , Egypt
 

Hi

It was long time since we did that work, but as I remember
it's QAM16 or QAM64 for V34 and V52
The best source of information is the ITU standards

Salam
Hossam Alz0omor
www(.)i-g(.)org
 

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