AB 126, AB 127 & AB 128
For manual LB Systems
Magneto wall telephones
When the handle of the generator is turned the bell is cut out. Two dry cells RK 210 are required for each telephone. A suitable battery case is RK 2300. In places where disturbing noise occurs and the speech as transmitted by the ordinary kind of microphone is not satisfactory, it is advisable to use AB 129 which is provided with a special Laryngotelephone.
Last revised: September 29, 2019
Taken from the L. M. Ericsson Telephones and Signalling Material Catalogue No. 188 (1934)
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