Subj : Weekly nodelist report on noteworthy changes (278)
To   : Michiel van der Vlist
From : Dmitry Protasoff
Date : Tue Oct 08 2024 00:49:01

Hello, Michiel!

Monday October 07 2024 21:32, you wrote to me:

 MV> almost all of Europe. Russia is behind the state of the art...

Russia is busy learning how to setup VPN connections because everything is blocked - youtube, faceboot, instagram, etc.. Russia now finds itself in quite the internet-loving company: China, Iran and Turkmenistan.

 MV> C35. I am not sure about the number but it did have that build in
 MV> modem supprt. I had a "data cable" to connect it to the serial port of
 MV> my laptop and I could call out. I had three telephone numbers with it.

Exactly!

 MV> One fo voice, one for data and one for fax. I never used the fax. IIRC
 MV> it cpould actually also do 14K4 under some circumstances. Problem: it
 MV> was bloody expensive!

14k was possible with HSCSD, extension of CSD. But it was implemented only in some networks and required specific hardware.
In Russia there is large number of different ancient IoT devices that can do only CSD calls to "homebase" that's why they keep CSD runnig. In UK CSD is long dead.

 MV> transmitter and use the digital signal to diretly FSK the oscilator of
 MV> the transmitter? And so I did. I used a shift of 5 kHz on the 144 MHz
 MV> transmitter. On the receiving end I extracted the ones and zeros
 MV> directly from the receiver's FM discriminator. Thereby converting the
 MV> tranceiver to a "modem". We got reliable 4800 Bps connection that way.
 MV> Those were the days!

It was a great era when you could do and understand everything from low-level hardware to software. Now, it's just impossible to be an expert in every layer.

Best regards,
             dp.

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 * Origin: All is good in St. John's Wood (2:5001/100.1)

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