HOW DOES IT WORK?



BUZZERS
BELLS
DIALS - Trigger and Slipping Cam
EXCHANGE LINES
ISDN
PABX
POWER SUPPLIES
PST - Plug and Socket Telephone System
STROWGER - step by step - the old electo-mechanical exchanges
TELEPHONES - An overview
700 TYPE TELEPHONES
 
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Last revised: December 06, 2010

FM