Operation Manual

Connecting ISDN Telephones

FRITZ!Box Fon WLAN 7570 vDSL 27

3.11 Connecting ISDN Telephones

ISDN telephones can be connected to the FRITZ!Box and

used to make calls via the Internet and the fixed-line net-

work. With appropriate cabling, up to eight ISDN tele-

phones can be connected.

Connecting an ISDN telephone to the FRITZ!Box

Connecting Use an ISDN cable to connect an ISDN telephone.

1. Connect one end of the ISDN cable with the ISDN tele-

phone.

2. Connect the other end of the ISDN cable with the “S

int” port of the FRITZ!Box.