Connect Key 1.5 - receive fax manually

Hi,

I'm using a Xerox machine (7225) with Connect Key 1.5.

I have only one telephone line which I use also to receiving fax.

My problem is that I cannot find anywhere the classic ON-HOOK send/receive manually option or button!

So if I answer the telephone and realize that it's a fax a cannot "tell" the printer to receive and print it so i lose it.

Am I doing something wrong?

Thank you

Karina