FRITZ!Box 7581 Service - Knowledge Base

FRITZ!Box 7581 Service

Maximum cable lengths

The FRITZ!Box comes with various cables to connect it to your line, a computer, or hub, for example. If a cable is too short, you can extend or replace it. Since you can only extend cables to a certain limit, below you will find information on the maximum possible length for each type of cable.

1 DSL cable

The entire section of cable between the "telephone jack -- DSL splitter (not always present) -- FRITZ!Box" may be up to 20 meters long, often even longer. It depends on the distance between your DSL provider's exchange and your DSL line.

Note:If you are making your own DSL cable, we recommend using CAT 5 UTP network cables.

2 Telephone cable

Normally, the cable between a telephony device and an analog extension on the FRITZ!Box (for example "FON 1") may be up to 100 meters long, but that depends on the telephony device being used.

The cable between a telephony device and the "FON S0" socket on the FRITZ!Box can be up to 10 meters long.

Note:You can also have a technician install an S0 bus that is connected to the "FON S0" socket. It is important for the "FON S0" socket on the FRITZ!Box to be terminated. Two 100 Ohm resistors are switched on the "FON S0" socket in the FRITZ!Box.

3 Network cable

The network cable between the FRITZ!Box and a computer or hub/switch may be up to 100 meters long.

4 USB cable

The cable of USB devices connected to the USB port on the FRITZ!Box should be a maximum of 5 meters long.