Replacing Sunrise Connect Box 3 Fiber with Fritzbox 5590

mtu

Hello Sunrise Community,

I’ve read on Digitec and Reddit that it’s feasible to fully replace the Connect Box 3 Fiber with a Fritzbox 5590 XGS-PON, provided correct configuration. As a software developer, I need more advanced networking features—unfortunately, the Connect Box 3 does not meet these requirements at all.

My questions:

Is it possible to completely substitute the Sunrise box with the Fritzbox 5590 (not just via DMZ or Bridge mode)? Any feedback or experiences from the community?
If full replacement is possible, could someone provide a detailed, technical, step-by-step procedure to get it operational with Sunrise?

Thanks for your support.

Best regards,

Mathias

Xydocq

hello mtu

Welcome to the community.

To answer both your questions: no and no

Please have a look at https://community.sunrise.ch/d/45013-use-your-own-modem-or-router

schoad

mtu

Xydocq the answer is yes and yes

a) you need to get a SFP+ XGS-PON ONT which costs 150-225 CHF depending on the model

b) you need to extract a few things from the Fiber 3 box

c) you need to be able to configure the VLAN (131) and the MAC on your Fritzbox

I use a Mikrotik CCR2004 router and a XGS-PON SFP+ ONT with 8311 custom firmware.

Guide:

https://smma.ch/2025/08/04/was-110-mit-8311-community-firmware/

I am still trying to get IPTV working.

mtu

Thank you @Xydocq, this is indeed very helpful and I didn’t see that post. It’s a shame that we have to stick with this Router given all the possibilities out there and the lack of features of the Connect Box 3 Fiber.

I noticed in your link that the Fiber XPS can also be supported by a Zyxel Router.

Is this something we can ask Sunrise to change the Connect Box 3 Fiber Router by the Zyxel one ?

Thank you again for your help.

Xydocq

mtu Is this something we can ask Sunrise to change the Connect Box 3 Fiber Router by the Zyxel one ?

Unfortunately no, Sunrise doesn’t offer the Zyxel Router any longer. Currently they only offer/support the Connect Box 3.

Xydocq

schoad once you receive a notice from Sunrise, that something is going to change with your internet-connection, you’re doomed.

While it was/is possible to use a third party solution on Swisscom-Fibre (rented by Sunrise/Layer 3) it will definitely not work once Sunrise switches you to their own Fibre (Layer 2).

There’s no way to figure out, if it is a Swisscom or Sunrise Fibre connection? So why waste money and time, just to be left in the cold?

schoad

Xydocq

Sunrise Fiber still works.

And you keep your old router … if for some reason something changes, you use the old router, dump the new values and use the XGS-PON module again.

why? one shitty device less. no double-NAT. less power usage.

free choice of router or ONT should be the law!