4 ms·

Only if you could get the other party to type +++ first to enter command mode, though. I'm not aware of any modem that would accept commands, including ATH0, ou

Only if you could get the other party to type +++ first to enter command mode, though. I'm not aware of any modem that would accept commands, including ATH0, outside of command mode. Then again, there were a lot of bad modems in the world…

puzzle 8y ago
Well, yeah, my "ATH0" was shorthand for "+++ATH0". All it would take was a hand crafted ping packet and a bad modem on the receiving end. The better modems implemented the Hayes safeguard of checking that no data was sent for an entire second after the third plus. Then, and only then, they would enter command mode.