M. Shokuie Nia wrote:
Dear folk,
My problem solved after two day research and try and error method ;). It was
related to rxgain of the board im using. I've set the rxgain to 12 and it
seems made some problem. As far as I got the spandsp is so sensitive about
noise on the line and because of that it couldn’t hand shake with other side
well.
rxfax isn't sensitive to noise at all. At a gain of 12 you've caused
overloading and distortion, and the signal cannot be decoded. Many
people seem to be nearly deaf. They run systems at massive gain with
awful distortion, and seem content until they find something like a
modem or DTMF detection doesn't work too well.
Steve
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