TELEPHONE - WALL
Battery ringing telephone
Domestic telephone for battery ringing

BC 3051
Parts:
Handset RE 9312 with key and cord RS 4252, terminal block of black polished wood (dimensions 75mm x 116mm) with press button for signalling, bell, terminals and suspension hook for the Handset.

Weight 0.6 kg.

Two telephones can be connected over a line up to 300m with good insulation.  If the distance is less than 50m one common battery will be sufficient.  For greater distances it is advisable to use one battery for each telephone; two conductors between the telephones are then sufficient.

If several telephones are to be connected, a separate simple switch with a number of contacts corresponding to the number of telephones in the system is required at each telephone.  In such systems only those telephones with switches can call and talk with the others.

An installation with up to 5 telephones can be obtained by means of an inductive resistance with condenser, BC 3060, and a switch for each telephone. All telephones can then call and talk with each other.  Only one conversation can be carried on at a time.  The length of the lines should not exceed 50m. A suitable battery is composed of 2 dry cells RK 210 connected in series.  A suitable battery case is RK 2300. Lead cable, Type EEB, is suitable for the wiring.

Last revised: June 08, 2024