search for: no_calibration

...terrupts. My problems with this setup are as follows: - I hear a soft fading hiss in the background on the TDM40P-connected phones. It's also present when I call something like voicemail or a conference on my local box, so it doesn't seem to come from the X100P. If I uncomment the "NO_CALIBRATION"-option in the Zaptel Makefile, the hiss decreases in volume, but is still audible. - Some of my TDM40P-connected phones go dead frequently. By "dead", I mean that the line-voltage goes away, so there's nothing there when they're picked up. When this happens, the remedy is...