|Steel Case Magneto Wall Telephones
A separate receiver and transmitter, hanging micro-telephone or micro-telephone resting on a cradle, as desired.
The generators will operate a 1000 ohm ringer satisfactorily through a line resistance up to 30,000 ohms.
Polarised ringers-for resistance see table below.
The transmitter arm on N2800 type is adjustable for height.
The terminals are enclosed, mounted on ebonite, and all parts of the circuit are very efficiently insulated from the case.
A lightning arrester is fitted.
For tropical climates these instruments are specially treated, and are not fitted with lightning arresters.
Taken from the Ericsson catalogue, edition 26
Last revised: October 04, 2019