Siemens and DeTeWe W48 telephone

A standard West German Post Office (Bundespost) design, this updated version of the W38 was imported in the 1950s and 60s by firms who offered German PAX systems (such as Modern Telephones and Hadley Telecom). The case and handset are made of Bakelite. This design was made for the Bundespost by several West German manufacturers but only the Siemens and DeTeWe products were used in Britain.

Colours:
Black, ivory.

Users:
PAX systems only in the UK, but also PABX's and the public network in Germany and elsewhere.

Variants:
There was a corresponding wall telephone. DeTeWe versions have the name Modernphone screen-printed on the number card holder. Siemens versions can have on the back a circular red transfer with the name of the installer (Hadley of  Birmingham).

Click here for the Circuit Diagram (CD users only)

For more information click here

How to wire a W48 to work on the UK plug and Socket system

1. Remove the original line cord.
2. Connect white of the new line cord to terminal B.
3. Connect red of the new line cord to terminal A.
4. On one tag of the capacitor there is a single wire - disconnect and insulate the wire.
5. Connect blue of the new line cord to other tag of the capacitor where two wires are terminated.

The bell coils should have a resistor added to pad the resistance out, but as I do not know the colours of the phone wiring I am unable to advise.

These phones are not approved and must not be connected to any public network
 

Last revised: November 10, 2008

FM2