L. M. ERICSSON
TELEPHONE AD 200

TELEPHONE - WALL
Telephone set for intermediate station on 2 single or double lines.
Magneto system.

AD 200 (Originally numbered the Telephone No. 330)
Made with a polished oak frame, the lower part of which is a battery cabinet (internal dimensions: height: 200mm, width: 185mm, depth: 105mm).

The telephone consists of:
Hanging microphone RE 4050 with cord RS 6500.
Five-magnet generator RH 5050.
Ringer with 1000 ohm resistance.
Push button, which should be pressed when the signal is given.
Two-way switch.

The device is equipped with a metal clip for holding an annotation block.

The intermediate station can talk to one or the other line depending on whether the switcher is placed on the left or right. A signal coming from either line rings the bell of the intermediate station, regardless of whether the changer is on the left or right. Both lines can signal and talk to each other if the intermediate station's microphone is on-hook. When two devices talk to each other, the third cannot listen.

The intermediate station device can be used for 2 single lines as well as for 2 double lines or for a single and a double line.

Dimensions:
Back piece height: 715mm.
Back piece width: 250mm.

Weight 9.8 kg.

Taken from the L. M. Ericsson Telephones and Signalling Material Catalogue No. 122 (1930) - Swedish Translation

Also found in the Ericsson Catalogue 7th Edition (1923)

Last revised: March 27, 2024