Hi,
I have FRITZ!Box Fon WLAN 7050 Annex A, Firmware version 14.04.26, and when I try to connect to ISDN/Analog my normal Fixed line (not ISDN).
I made a cable to convert 4 Pin RJ11 to 8 Pin RJ45, connecting to pin 1 and 8 of RJ45.
But when i try to use the fixed line it's allways busy...