Sharp Fax Machines Incompatible with Class 2 Fax Modems

This article was previously published under Q116155

Sharp fax machines are incompatible with Class 2 modems. Although Microsoft At Work PC Fax may be able to send faxes to these machines, it cannot receive faxes from them. The Sharp fax machine does not respond properly to the ATA command to answer an incoming call. This problem was confirmed with the Sharp Model FO5220 fax machine and the Intel 144/144e modem.