Grzyb wrote on 2023-06-28, 14:38:No need to run own GSM network.
The original GSM standard (2G) is still supported by modern cellular networks.
Currently, operat […]
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No need to run own GSM network.
The original GSM standard (2G) is still supported by modern cellular networks.
Currently, operators are about to disable 3G support, and safe bet they will also disable 4G when 5G dominates the market.
But I don't think there are any plans to disable 2G - there's plenty of specialized devices that only support 2G.
They are definitely talking about shutting down 2G in France but there are a lot of issues because some critical systems works over 2G.
Like emergency buttons in elevators and some infrastructure equipments (water or energy distribution, remotely controlled/monitored through old 2G systems)
By the meantime, you can probably still use 2G PCMCIA modem cards to play Doom on the go.
I don't think there is any use for landline dialup analog modems. (So i don't keep them)
You can use a Cisco analog to VOIP converter to connect two modems. But these devices are not really cheap.
Cathode Ray Dude did a video about that : https://www.youtube.com/watch?v=EGFIEF6siIE (+ A tutorial on his website : https://gekk.info/articles/ata-config.html )
Two modems can't be connected directly because key parts of the dial process are handled by the telephone network and not by the modems.
I'm not a telephone engineer but i suppose that the two modems also can't negotiate the analog modulation details by themselves.
The noise heard after dialing on an analog modem is actually a handshake/negociation for the analog protocol to be used.
Anyway, using serial null modem cable is much easier.
Raw serial for HyperTerminal/XMODEM/ZMODEM.... or for games that supports it (Doom, Diablo, ...)
Or, if you need IP, you can use PPP over the serial link
I've used that several time at home : Retro Laptop W95 -> Null modem cable -> USB serial adapter -> RaspberryPi (PPP server + routing) -> Home Network/Internet.
Enjoy you home 1Gbps fiber optics over a 9600baud serial link !
"Hello, my friend. Stay awhile and listen..."
My collection (not up to date)