I'm really thinking that the line goes off hook when you plug it into the system for some reason.
But if that were true, wouldn't I not receive calls on that line? Incoming calls work fine.
It seems like the line goes off hook when I pick up the receiver, but then the CO immediately interprets something as an auto-dialed "1". After I dial 7 digits, I get the message "We're sorry. It's not necessary to dial a 1 when calling this number".
