TELEPHONE - TABLE
For Automatic telephone systemsBC 311
Main station set (extension switch) for ZB/SA operation in steel casing.
This is a small extension unit for 1 main and 1 extension. Also manufactured
for 2 extensions (BC 313).
A crank switch is used to select between outside line, through line and
extension calls. The terminal station is called by the generator within the
case of the intermediate station, with the terminal station calling the
intermediate by the same means.
Under the glass window there is a lattice display for indicating that the
extension is busy in the intercom position.
With the indicator removed and the internal circuitry modified, that the set can be used
as a simple subscriber station; the changeover switch thus being without function.
Incoming calls ring a wall mounted bell.
Made by KTV.
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