I am coming back as the shops linked above do not sync outside of Germany.
The phone outlet is 4pc4 and it has only the 2 middle pins there. I plug in the analog phone and it works . RJ11 with 4 pins but only the 2 middle ones 2&3 are grumped.
I tried to grimp a RJ11 to rj45 but it it is either wrong combination or bad fritzbox
I have tried:
-RJ11 the 2 middle pins 2 &3. Rj45 pins 4&5
-RJ11 the 2 middle pins 2 &3. Rj45 pins 5&6
-RJ11 the 2 middle pins 2 &3. Rj45 pins 1&8
None worked
What is the correct value?