how do you set up your phone to give the caller an option to either leave a voicemail or fax?

Question

I recently bought a fax machine- I'm using the same line because I don't get a whole lot of faxes. How can I give the caller an option to either leave a voicemail or a fax w/o having to be home to take the call?

Answer 1

RadioShack no longer carries the Automatic Fax/Data Switch unfortunately. You can still find them on eBay and they will do what you want. Amazon sells a different brand that does the same:
http://www.amazon.com/gp/product/B00004Z7H5/ref=dp_cp_ob_title_0/102-3820800-5369742

Answer 2

RAdio shack will have the item you need. It self senses the incoming signal to transfer it to the right receiving item