Hi dkeeton,
Thank you for using the Support Forum. Please take a look at these instructions for setting up the fax lines, you can set them for send/receive, receive only or send only. I hope this helps if not please consider contacting your support centre for further assistance.
We have a workcentre 5775 that just had a second phone line added. Is it possible to set the machine so the fax from pc will only use the second phone line for outgoing faxes, but leave the first line so it can send and receive faxes for a different department.
Thanks.
David