Curious to know if your Asterisk system is susceptible to red boxing.
Could be an alternate universe timeline for him.
Maybe you can share how old you are to get a sense of what age group carried these around?
I think I was around 13, which would have been 1997 - a red box was a simple thing to build if you had any sort of soldering supplies, and moderately fun to play with. I didn't even really have anyone I needed to call - I think I probably used it maybe three times in my entire life.
But that is interesting. The 80's system creators, probably let the authentication (rate and money counting) on the backend. And didn't filtered input probably because they thought anyone willing the cheat would just cut the wires and bypass any filter on the phone to send the tones... so in the end, the whole system was based on the tones being secret.
The 90's system assumes anyone cheating would be deterred by the sofware on the phone, and leaves an open line? So it is based on everyone using the phone? what happens if someone bypass the phone and go to the wire directly? is there a tone?