TRAFFIC CONTROL TELEPHONE SYSTEMS Circuit - Sam Hallas

Line Test Set . . . . . . Designed for the purpose of making periodic
line tests or locating faults which
occur on the line.
At Each Way Station
For use where the Controller is listening continuously, one of three methods
may be employed.
1. One 4001-A Selector Set and
One 4308-C Telephone Set
or 2. One 4002-A Selector Set
(Combined Selector and Telephone Set)
or 3. One 4001-A Selector Set
One 4311-A Telephone Set
One 4001-A Foot Switch
For use where the Controller is not listening continuously:-
Magneto Calling
Wall Mounting types
Desk type Telephone
1. With the addition of the 4013-A Generator either of the three
methods previously described may be used.
or 2. One 4001-A Selector Set Wall Mounting type
One 4101-AK Telephone Set
Line Loop Calling
1. One 4001-B Selector Set
One 4311-D Telephone Set
or 2. One 4002-B Selector Set
or 2. One 4002-C Selector Set
4304 Type Selector
Wall Mounting type
Desk type Telephone
Wall Mounting type
A selector is required at each way station, irrespective of the type of selector
set used. It is not an integral part of the selector set, and must be ordered separately.
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