FRITZ!Box 7581 Service - Knowledge Base
Pin assignment of ports for telephony devices
The FRITZ!Box has various ports for connecting telephony devices. Here you will find the pin assignment of the FRITZ!Box ports so you can use your own cables, for example.
1 RJ11 sockets of extensions "FON 1" and "FON 2"
The two middle pins 3 and 4 are assigned on the RJ11 sockets.
2 TAE sockets of extensions "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