the only thing i can think of is that you have it configured to answer after so many rings.
open fax console, click on tools and on the drp down menu click on configure fax, lick next twice which will bring up a menu whereby you can select enable send and enable receive. Here you can select manual answer or automatic answer. Try slecting manual answer and see if this resolves your problem.
Other than that im not too sure. I use fax console to send faxes and receive them via www. trinite.co.uk fantastic service as i dont have to have my pc on all day to receive faxes.
hope this helps.