How to receive a fax without a fax machine

Most people picture a fax number as a property of a machine — the machine is the number, and unplugging it takes the number with it. It is the other way round. The number belongs to the network, and what answers it is a choice. Point it at a device and pages come out on paper; point it at software and they arrive as files.

What happens when somebody faxes you

1. Their machine dials your number and the carrier answers it, in a data centre, with a modem in software.
2. The two ends negotiate — speed, resolution, page size — and the pages transfer one at a time, each acknowledged as it lands.
3. The pages become a document, and it appears in your inbox with the sender's number, the time and the page count. Their machine prints its own confirmation, none the wiser.

From the sender's side nothing is different. They dial a fax number, they get a fax tone, they get a transmission report. This matters, because the whole reason you need a fax number is usually that somebody else's process requires one.

Choosing the number

A fax number is geographic in the same way a phone number is: an area code says where you are, and to a clinic or a court that is not decoration. Two things decide what you can have:

• The country. In the United States and Canada a number is issued immediately. Everywhere else the regulator requires documents first — an address in the country, a company registration, sometimes an ID — and the number arrives after a review rather than on the click.
• The area code, where the country has them. Some countries have none at all, and in those the number is simply national.

Where the pages actually go

This is the part worth thinking about for more than a minute, because it is what a machine in a corridor gets wrong. A received fax is a document somebody sent you, often containing exactly the kind of information that should not sit face-up in a tray.

Received faxes land in an inbox, not on paper. Who can open that inbox is a setting rather than who happens to walk past — which is the whole argument in giving a team one fax number without sharing a password.

What you lose, honestly

Two things. A machine works when the internet does not, which matters in exactly one scenario and is worth naming. And a machine gives you a physical page immediately, which some intake desks still genuinely prefer.

What you gain in exchange is that nothing is lost between the tray and the file, the document is searchable, and the record of what arrived and when is kept by something other than a person's memory.