Fax machines use data network.
Modern fax machines use scanned documents to transmit text.
Photocopiers, fax machines, franking machines, computers, coffee machines, shredders, scanners and others.
Voice
Network-connectable fax machines can be obtained and function much like a network printer, with added input for recipient data. A networked fax machine will typically come with its own fax software for use by the client when sending a fax from their network.
Fax machines can be hooked up to your regular phone line. The disadvantage of this is that your line will be busy while sending or receiving a fax.
I used fax machines before, but it is very uncomfortable, now use <a href="http://www.popfax.com> Popfax </a> which is an internet fax and does not require a fax machine and it is much easier.
Most of today's fax machines have some sort of computer processor, which rely on mathematics.
Many people and companies still use fax machines. A great place to go to find out about the different brands would be a place like Staples or Office Depot.
The idea behind a virtual fax is to enable business to send email faxes without the use of a fax machine. This helps to reduce the cost for fax machines, fax services and long distance fees.
The type you could use is the T.38 capable fax machine. A FoIP network is used to scan and send items when fax machines use the servers to transmit faxes.
On any fax machine, you can use it while there is a phone attached / thetherd to it. On some fax machines (very few models) you can talk on the phone then fax when you're ready to fax. For this feature, the fax machine on the other end would need the feature as well.