Type CL 500
Intermediate Table Telephone for 2 Metallic Circuits
Common Battery System
FRAMEWORK enamelled steel.
MICRO-TELEPHONE. PE 1005, with cord RS 6010, resting on a cradle-switch, with flexible cable RS 9805 (Old No. 2428).
GENERATOR. RH 2455, 2-magnet.
TWO POLARISED RINGERS, each of 1,000 ohms resistance, one enclosed in the table telephone, and one in the wall-pattern bell case, type RA 112, the framework of which is also of enamelled steel.
LINE CONDENSER of two microfarad capacity, and a 3-WAY SWITCH.
INDICATOR of the "Star" type is fitted, for the purpose of showing when a sub-station telephone is in connection with the Exchange. (A condenser of 1 microfarad capacity is connected in parallel with the indicator.)
The intermediate telephone is in connection with the Exchange, or the sub-station, respectively, depending upon the switch being either to the right or to the left-hand. If the switch is in its central position, the Exchange and the sub-station telephone are in connection.
Signals from the Exchange or from the sub-station telephone ring one of the bells, again depending upon the position of the switch. If the intermediate telephone is speaking with one of the lines connected, the conversation cannot be overheard.
Overall dimensions: 11.9 x 9.5 x 5.9 inches.
Weight 13.50 lbs.
Taken from the Ericsson Telephone Catalogue 1912
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