Refers to the technology or process of facsimile transmission, often in technical or formal contexts.
I sent the document by facsimile.
fax; fax machine
Commonly used to mean both the fax machine itself and the fax communication method. Often abbreviated as ファックス in everyday speech.
See also: ファックス
I bought a new fax machine.
Please send the order form by fax.
Please send the contract by fax.
I notified them of the meeting schedule by fax.