Aside from being uncontrollable, needing daily reset and not fitting into a rack, it's pretty good. Wow.
Why is it still widely used? For that matter, just HOW is it widely used?
had to sign a non disclosure agreement with Sirius to
get the serial commands
This is insane. Sirius was afraid, I guess, that thousands of installers nationwide would buy their product and make it work successfully, thus giving them a good name.
you have to enter a service mode to get it to respond to RS232
commands: this disables the front panel display and every time
you turn the unit off it resets: the RS232 port is useless
Ah. This ensured that they would not have a good name, no matter how much information you have. How absolutely bizarre!