PPE: Personal Protective Equipment
a telephone interface on an alarm system is for it to dial out to a remote monitor station. the monitor station then contacts the fire/police/owner or other authorities to notify that an alarm has been tripped. such interfaces may or may not have voice capability, most just use modem tones to communicate with a computer.
When you are that close to a lightning strike, you hear a loud snap, immediatelyand I mean immediatelyfollowed by an ear-splitting explosion of thunder!
