FIRE ALARM EQUIPMENT
HISTORY OF ATM
LOUDSPEAKING
TELEPHONES
PROTOTYPES
SPREADSHEET of ATM
and STROWGER Co. TELEPHONES
SWITCHBOARDS,
PAX and PABX SYSTEMS
TELEPHONES
ATE - What ATM became
AEP - Portuguese subsidiary that produced ATM
telephones
Please note that the number on ATM diagrams is just a diagram number.
They generally start with L53 and are 6 digits long.