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Intermediate Table Telephone for 2 Metallic Circuits
Common Battery System

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CL 510
FRAMEWORK. Base and sides of black enamelled steel, top-plate of ebonised pear-tree wood.

MICRO-TELEPHONE. RE 1005, with cord RS 6010, resting on a cradle-switch, and flexible cable RS 9801.

GENERATOR. RH 2460, 2-magnet.

RINGER of 1,000 ohms resistance.

LINE CONDENSER of two microfarad capacity.

INDICATOR of the "Star" type is fitted for the purpose of showing when a sub-station telephone is speaking with the Exchange. (A condenser of 1 microfarad capacity is connected in parallel with this indicator.)


WALL FITTING. Type RA 116, framework of polished walnut, and ringer of 1,000 ohms resistance.

All the terminals are enclosed.

If required, and without extra cost, this telephone can be supplied enamelled to match walnut.

The intermediate telephone is in connection with the Exchange, or with the sub-station respectively, depending upon the switch being either to the left or to the right-hand.

If the switch is in its central position, the Exchange and sub-station telephone are in connection.

Signals from the sub-station telephones are heard at the intermediate station independently of the position of the switch.

If the intermediate telephone is speaking with one of the lines connected, the conversation cannot be overheard.

Weight 12.5 lbs.

Taken from the Ericsson Telephone Catalogue 1912

Introduced in 1905.


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Last revised: May 27, 2024