Paul and Nancy,
The HP AIO is networked, which is good. However, is it enabled to send fax from PC, and is it enabled to receive fax to PC? This is critical to know, because the features you are asking for will be present or absent based upon the software features of your equipment.
Bert and I would like to know the model number of your HP AIO. I think we can help you if you can give us this information so we can look up it's capabilities.
For example, Bert and I have a all-in-one fax/copier/scanner made by Muratec, called the Muratec 1430. We lease ours for a monthly fee from a local supplier, which includes copier toner and monthly service/cleaning, etc. Ours has a menu that is accessible by any PC on the network. We have entered in all the fax addresses to all the local and regional pharmacies.
Ours is truly Internet-Fax and PC-Fax capable. The menu allows us to modify all kinds of settings and options in regard to faxing from PC or internet faxing.
For example, ours will work every time. If a fax does not go through for whatever reason, an image of that fax will print out from the scanner, it will beep several times indicating an error. Then we have written confirmation that the fax did not go through. The pharmacy/fax number is written on the top of the page, so we know where to resend the page.
We can also archive all faxes onto our server, so that we have copies of all faxes that ever go through our machine.
I'd be happy to spend time with you on this issue, because this is extremely helpful to have.
Yours,