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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 as well as of the FRITZ!Box's sockets so you can use your own cables, for example.

Note:The FRITZ!Box is available in several different product variants, each of which is delivered with different components. For the exact contents of the package, see the information printed on the FRITZ!Box package.

1 DSL cable (RJ45/TAE)

Pins 4 and 5 on the RJ45 plug lead to Pins 1 and 2 on the TAE plug (see fig.).

Fig.: Assignment of the DSL cable

2 "FON S0" socket on the FRITZ!Box

The cables of ISDN devices connected to the "FON S0" socket on the FRITZ!Box must be assigned as follows:

Note:If you use the adapter included with delivery you can use both of the FRITZ!Box's "FON S0" sockets, without the adapter you can only use the first socket. You can have a technician install an S0 interface connected to the "FON S0" socket. The "FON S0" socket is terminated (two 100 Ohm resistors are switched on the "FON S0" socket in the FRITZ!Box).

Fig.: Assignment of the ISDN cable for first socket


Fig.: Assignment of the ISDN cable for second socket

3 RJ11 sockets of sockets "FON 1" and "FON 2"

The two middle pins 3 and 4 are assigned on the RJ11 sockets.

4 TAE sockets of sockets "FON 1" and "FON 2"

The TAE sockets are assigned in such a way that contacts 1 and 2 on TAE plugs must be assigned (see fig.).

Fig.: Contacts 1 and 2 on a TAE plug