Type AE 250
Intermediate Table Telephone for 2 Extension Lines, Earth or
FRAMEWORK. Base and sides black enamelled steel. Top plate ebonised pear-tree wood.
If required and without extra cost, this instrument can be supplied enamelled to match walnut.
MICRO-TELEPHONE. RE 1004, with cord RS 6010, resting on a cradle switch, flexible cable RS 9800 (Old No. 2429).
GENERATOR. RH 4501, 4-magnet, which rings satisfactorily through a line resistance of 25,000 ohms.
RINGER. 300 ohms resistance.
WALL FITTING. RA 122, with framework of black enamelled steel, with 1000 ohm ringer and disc protector, for two earth or metallic circuits. The terminals are all enclosed.
The intermediate station can communicate with either of the two extension stations depending upon the position of the switch.
A signal given by one of the extension stations will ring either the intermediate or other extension station, depending upon the position of the switch, which under normal conditions should be in the right or left-hand position.
A signal coming from the respective extension station will ring the intermediate station only.
When the switch is in the central position, the two extension stations can communicate with each other, without being overheard by the intermediate station.
This telephone can be used for two earth circuits, two metallic circuits, or one earth circuit and one metallic circuit.
Overall dimensions: 13.10 x 7.60 x 5.65 inches.
Total weight 13.44 lbs.
Taken from the Ericsson Telephone Catalogue 1912
Last revised: September 30, 2019