BATTERY RINGING TELEPHONES
The telephones described below are particularly suitable for private telephone installations of the most simple type. They may be connected to ordinary electric bell systems and are suitable for lines up to 300 m with good insulation. The connection is very simple.
BC 3011 & BC 3012
Domestic telephones for battery ringing
microtelephone RE 9312 with key and cord RS 4252, terminal block of black polished wood (diameter 51 mm) with press button for signalling, terminals and suspension hook for the microtelephone.
Two dry cells RK 210 are required. A suitable battery case is RK 2300. Lead cable, Type EEB, is suitable for the wiring. When these telephones are connected for signalling in two directions each telephone requires a separate bell RA 510/3, RA 610/3, or, if louder signals are desired, RA 500/3.
BC 3011 for use with BC 3001 & BC 3012
BC 3012 for use with BC 3011
Taken from the L. M. Ericsson Telephones and Signalling Material Catalogue No. 188 (1934)
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