FRITZ!Box 7430 Service - Knowledge Base
Assignment of the cables and sockets
The FRITZ!Box has various sockets for connecting it to your DSL line and connecting your telephony devices to it. Here you will find the assignment of the cables included with delivery and the FRITZ!Box socket so you can use your own cables, for example.
1 DSL cable (RJ45/RJ11)
Pins 4 and 5 of RJ45 plugs must be assigned. Pins 3 and 4 of RJ11 plugs must be assigned. Since the order does not matter, they cannot be accidentally swapped.
2 RJ11 socket of "FON" extension
The two middle pins 3 and 4 are assigned on the RJ11 socket.