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To send a fax you need access to a handhshaked landline. A direct wire between the stations. Faxes synchronize themselves, send data and test the bit, makeing s
by aurizon 7y ago
To send a fax you need access to a handhshaked landline. A direct wire between the stations. Faxes synchronize themselves, send data and test the bit, makeing sure it is properlt placed in the data queue, and send the next and so on =handshake. Suggest you look up old fax synchronization and I tossed my last muirhead rotary in 1982 - used it for weather maps.https://electronics.howstuffworks.com/gadgets/fax/history-of-fax3.htm https://electronics.howstuffworks.com/gadgets/fax/history-of...
Newspapers have used it since the 1800's in one for or another. Wire-Photo https://antique-photos.com/en/helpful-info/476-wire-photos.html https://antique-photos.com/en/helpful-info/476-wire-photos.h...
This is a relic of the old Muirhead rotary scanning fax machines abd the same standard persists. This is hard to do via radio. So radios send a pdf to a fax service. I have a fax service for $10 a month, I send it via desktop or mobile, and receive the same way as a pdf. With a mobile printer or office printer you get hard copy.
https://www.myfax.com/features https://www.myfax.com/features
- vpzom 7y agoWhat exactly makes this "hard via radio"?
- neximo64 7y agoThe codec used in calls to landlines disallows the bandwidth required.
- tjohns 7y agoRadio spectrum is precious, so virtually any type of radio telephony is significantly compressed, either in terms of raw audio bandwidth or by applying lossy digital compression — often both. This applies to both 2-way radio and cellular telephones. There are radio-fax standards. Marine weather reports are a good example that's still in use: https://en.wikipedia.org/wiki/Radiofax https://en.wikipedia.org/wiki/Radiofax However, the fax machines we use on our telephones were not designed with this in mind. The protocol is neither tolerant of the reduced bandwidth nor lossy compression from cellular networks... not to mention jitter if the call passes over a packet-switched network.