I bought an old programmable ‘call waiting’ message sign from a call centre and would like to get it working as a network dynamic display.
Any advice would be greatly appreciated as this is quite a bit outside of my experience.
Interface ports are unusual - phone sockets. Is this likely to be some serial variant? If so, is there any easy way to identify the pins without trial and error? I can wire via a 6 pin phone cable to DB9 if that is likely to work.
It seems to be related to the signs discussed here, since it shows SDX ACD on boot, although it has an Intel processor rather than Spectrum:
If this approach is a no-go, what would be necessary to use an Arduino to run this?
I see a number of MAX7219ENG LED driver chips and CD74H04E chips, which are apparently things called ‘High Speed CMOS Logic Hex Inverters’.
Lots of clearly labeled 5V outputs so I think directly powering the Arduino would not be a problem.