Hello, I wonder if it is possible to use another modem instead of Sunrise Internet Box Fiber ?
bixaro Welcome to the community!
For Fibre connections, which are not 10Gbit, you can get a FritzModem (5490). For this you can contact our support 0800 707 707. If you have a 10Gbit Fibre connection, only the Sunrise modem can be used.