Yes, there are many wireless fax machines out there. One of the best ones is the Lexmark Genesis S815. One of the cheapest is Lexmark Interpret S405. Both should do the job really well for you.
Yes. Some fax models on the market will let you fax through WiFi wireless. They still need to be physically attached to a phone line - the WiFi transmission is a wireless transmission from your computer to the fax. There are also GSM faxes - these are fax machines that connect wirelessly to a cellular tower and send and receive information through the phone network. As well, there are online fax services that would allow you to send and receive faxes just from a computer, regardless of whether it was wired to the internet or not. These work through central servers run through the online fax companies' websites.
There is probably an option to block a sender, but I don't think that there are any spam filters for fax machines.
The best brand of fax machines on a budget are the Hp Machines. These fax machines offer basic black and white printing at a fraction of the cost.
Fax machines use data network.
Yes, a wireless "all-in-one" printer can send a fax. Note that the fax printer will need to be connected to a telephone line; only the transmission from your computer to the fax printer is wireless.
Fax machines are available at any local Walmart store at competitive pricing. Walmart also advertises that they will meet any competitors price, assuring the lowest price possible.
Modern fax machines use scanned documents to transmit text.
Brother is one of the leading manufacturers in fax machines. There are several different types of fax machines including Black & White Laser, Color Laser, and Color Inkjet.
Fax machines are used to send paper documents to another fax machine user via a telephone line.
One could find a computer fax machine in an electronics store, however they could also be accessed from a local public library. Office supply stores can also send faxes, while public calling centres could have a fax facility.
If it is a "wireless fax machine" built for a home office or similar: You connect it the same way you to do a regular fax machine - by plugging the phone line into the appropriate place on the fax machine. There may be a base station that can transmit through wireless from the phone line to the fax machine. In most cases, however, a "wireless fax machine" is a wireless multifunction unit with fax capabilities. The wireless part is for printing and scanning, while the fax part still needs a phone connection to function. If it is a "wireless fax machine" built to work off of a cellular network: You'll have to contact your cellular provider - in most cases they'll have to activate it to make the phone connection work.
Panasonic Fax Machines are the best and most reliable.