I had the same issue happen but on a fax machine. Naturally, I couldn't hear anything when the 911 operator picked up, so I continued to try out various combina

I had the same issue happen but on a fax machine. Naturally, I couldn't hear anything when the 911 operator picked up, so I continued to try out various combinations, until the watchman and a cop showed up to check on the situation: just me trying to fax something abroad late at night.