ERICSSON | ||||||
![]() Telephone AC 310 had a 4 magnet generator and was previously numbered the model 383. Telephone AC 320 is similar to the AC 310 except that it had a ringer resistance of 1000
ohms, 4 magnet generator and a press button for cutting out the ringer coils and short circuiting the
induction coil. This button was pressed down whilst ringing out. Taken from the Ericsson Telephone Catalogue 1912 |
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Last revised: September 30, 2019FM2 |