Fax

thumb|upright=1.2|This fax machine from 1999 used relatively new inkjet printing technology on normal paper. thumb|upright=1.2|Like many fax machines, this 1990 model used thermal printing on relatively expensive [[thermal paper which came in rolls. The roll was inserted into a compartment in the machine.]]

thumb| thumb|Caselli's pantelegraph mechanism

Send and receive faxes online

Radiofacsimile, radiofax or HF fax is an analogue mode for transmitting grayscale images via high frequency (HF) radio waves. It was the predecessor to slow-scan television (SSTV). It was the primary method of sending photographs from remote sites (especially islands) from the 1930s to the early 1970s. It is still in limited use for transmitting weather charts and information to ships at sea.

Type of modem

prank fax transmission designed to waste the recipient's ink or paper