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 impl

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.