4 ms·
> 2600 Hz is a common handshake tone used in telco WAS not IS. It was phased out sometime in the 80s.
by coin 3y ago
> 2600 Hz is a common handshake tone used in telco
WAS not IS. It was phased out sometime in the 80s.
- op00to 3y agoI remember messing with a self-made blue box at my school's pay phone in the early 90s, mystifying and amazing my nerdy friends. That fun ended when the phone company visited the school, and it was blantantly obvious who was the culprit in the rash of telephone billing crimes committed from a single pay phone, only after 3pm. No charges pressed, but I had to promise some dude in a suit I had learned my lesson. I hadn't.