I have a faxmachine connected via an ATA to a BCM 400. One in every couple of lines is cut in half or unreadable. The rest are perfect. The BRI/PRI Telco lines on which the fax is received are error free. Swopping the fax machine proved that the fax machine is ok, i.e. it does the same on both machines. It does the same regardless if you set the ATA to modem or telephone in the software. Any help would be greatly appreciated.