THE TOUCH TONE PHONE  » 0164 «             DEUTSCHE BUNDESPOST (1989)
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This nice telephone has Transistors, ICs & buzzer inside. The KEY-PAD
generates DTMF (= DUAL-TONE-MULTI-FREQUENCY ) used in modern Tel.Nets
or can be set to produce PULSE-DIAL used in old Tel.Nets ...

If the telephone came with IWV, than it can be set to MFV ...

[A] TEMPORARY:         

[B] via HARDWARE ...

INSIDE:  Setting (>>>>) SWITCH = turn right = MFV / IWV = left turn

                       
German Terminology:
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Pulse-Dial / German: "IWV" = ImpulsWahlVerfahren
Tone-Dial  / German: "MFV" = MehrFrequenzVerfahren

 Have a look at »Tel-H1-LX« ...  

                       Historical Remarks ...
impressum:
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© C.HAMANN        http://public.BHT-Berlin.de/hamann         09/07/23