Yes, you can connect the FRITZ!Box 5690 Pro International to a Connect Box 3 in bridge mode from Sunrise via the WAN port. The FRITZ!Box 5690 Pro supports DSL and fibre optic connections and has a WAN port that is suitable for connection to a modem or another router bridge. The prerequisite is that the Connect Box 3 is correctly configured in bridge mode so that it only functions as a modem and the FRITZ!Box takes over the router functions.

The FRITZ!Box 5690 Pro is compatible with various Internet connections and can be connected to existing devices via the WAN port to control the home network. Make sure that the network settings such as DHCP and VLAN are set up accordingly with Sunrise, if necessary.

Hello,

the FRITZ!Box 5690 Pro can be supplied with Internet behind a fibre optic modem of the Internet provider via WAN port, as described in this setup guide for the FRITZ!Box 5690 Pro:

https://fritz.com/service...

If you have any further questions about the 5690 Pro, please do not hesitate to contact our technical support or purchase advice team by e-mail. Please send us the character string "#6996491" to the e-mail address: fritzhilft(at)avm(dot)de .

Kind regards from Berlin
Your FRITZ! team