Internet faxing became famous around 2005 because it wouldn't require any equipment at all. In fact, the boom was so great that some companies even offered free fax receiving and fax sending for a minimal free after installing their software on your computer.
The entire point of having Internet faxing is to avoid hardware or equipment all along simply because after sending or receiving a email over the internet all you need to do is print a copy of it for your personal records if you wish.
So, the only thing hardware you need is a printer to print your faxes but other than that there is no need to have any other hardware at all.
The whole point of having Internet faxing is to save you money so that you don't need to invest in hardware resources.