Some of my equipment will show a notice, hinting at a possible issue, when "MORE THAN 10 DIAL PULSES WERE RECEIVED".? A couple years ago, the responsibility of our switching gear was being transitioned to me as the previous guy was retiring.? During that period of time, I noticed a station in particular would throw that message a lot, up to 50 times a day. There is also an entry every time somebody calls 911. One late night I saw somebody call 911 multiple times.? I looked up the line and found it was the one with all the MORE THAN 10 DIAL PULSES WERE RECEIVED issues.? I called the sheriff's office. I asked if they had any weird 911 calls from that number.? They replied, ecstatically, "YES, like seven times!"? They said it would be static for a long period of time and eventually hang up. I suppose the dispatchers really shouldn't be quick to hang up their end, just in case.? So they have to wait out the call...listening to the static. I promptly unwired it and put in a trouble.? I thought, surely this isn't a common issue, right?? Lines with static on them don't just call 911 by themselves!? Do they?? Well, in my phone call with the Sheriff's Office, they said this is NOT an out of the ordinary event for them. I audited some more.? One of them, with a butt set in monitor mode, I heard a lot static with, "If you'd like to make a call please hang up and try again," in the background.? Looking at our logs, that one had called 911 too.? We keep those logs for 6 months.? In that 6 month period, my analysis found 16 "left-in" stations that had presumably self-dialed 911 a total of 35 times. Since I stumbled across that, we keep a much closer eye on these sorts of things.? Basically, any line that frequently or repeatably throws the MORE THAN 10 DIAL PULSES WERE RECEIVED notice, we do an audit on. A little more background on what causes this: Pulse dialing is performed by rapidly interrupting the telephone circuit for each digit dialed.? This method was sometimes referred to as loop disconnect dialing.? When you think of pulse dialing, you might immediately think of rotary phones.? You might also have visions of stepping switches. One interrupt represents the digit "1" being dialed.? Two rapid interrupts represents the digit "2", and so on.? You need to have at least a brief timeout between the digits to indicate you are done with that digit and starting the next.? The exact timing is relatively loose, leaving a lot of wiggle room.? Any sort of interference that is creating a make/break cycle has the potential to pulse dial.? Multiple makes and breaks with the right timing (and again, the timing is pretty loose) could conceivably call anywhere...with no human being involved!? The odd thing isn't having it happen - it's having it happen to a specific number. For 911, you simply need: ? - 9 rapid interruptions ? - pause ? - 1 interruption ? - pause ? - 1 interruption For lines that are shorting out, arcing, in water, or whatever, it is only a matter of time. -Mike Johnston