I have an HP 4345 MFP and we just got a magic jack plus and had the fax number ported over to it. We have used magic jacks with success at several locations on our campuses. However, I can't seem to get this one to work with our HP 4345 mfp.
From the magicjack I can plug in a regular telephone and send and receive calls just fine. But as soon as I plug it into the HP and try to send a fax I receive error messages from the magic jack. I am also hearing a beep sound from the HP - it's not the sound like a sending/receiving fax but a loud beep that happens about every 4-5 seconds when transmitting.
I have tried everything I can find online in my research. I have changed the baud settings, turned on/off ECM error correction mode and reset to default fax settings all to no avail. We also just updated the software on the magic jack.
Does anyone have any suggestions?