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Manuals
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Bell System Manuals
Controller
507
How to operate
Bell System 507 How To Operate
507 cordless switchboard
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De Scription of Th E 507 Swit
Incoming Calls
Out Going Ca Lls DI
Out Going Ca Lls Placed by
Call to Another Station Within
All Conn Ectin G Paths in
Transferring an in Coming
R Ecallin G T He Central Offi
Disconnect Signals
Trunk Holding Keys
Night Connections
Equipment Trouble
Battery Supply Failure
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