Problems with LAN connection, do I need a switch?

Dr
2
Problems with LAN connection, do I need a switch

Hello,
I would like to apologize in advance for any incorrect use of technical terms.
I recently moved and now have a 50Mbit fiber optic connection.
Unfortunately I still have severe lag spikes, and I wanted to test it over the LAN.
In the "server box" the "fiber optic router" from the provider is connected to a Fritzbox 7530 via LAN cable, there's a numbered patch field above, the LAN sockets in the apartment are also numbered.
My train of thought now was to connect a LAN cable A to the patch panel connection number 3 of the 3 LAN connections on the Firtzbox, and then to connect my laptop to socket number 3 with cable B in the apartment, but unfortunately I don't get one Connection with it.

I connected the laptop directly to the Fritzbox with both cables A and B, both work, only the way over the patch field does not seem to work.
I would be surprised if the assignment of the patch panel to the wall socket is incorrect, but it could naturally be a hole.
What I was wondering is whether I'm doing this completely wrong, and should I switch a switch between the "fiber optic router" and Fritzbox, and then connect LAN cable A from this switch to the patch field, instead of the Fritz box, so to speak to use as a switch (theoretically the 3 connections would be enough for me).
Unfortunately I don't have a LAN tester to check this.
Picture will follow

Ca

You moved. Who knows how old that thing is.

Me and my brother were desperate for something like this last year.

Have a technician come. You will get an up-to-date box and he will also set up all of your Wi-Fi devices…

Then give this poor technician a decent tip… If everything works fine. 30 euro minimum. He is a poor eater himself.

Mi

Take a look at the following information about the patch panel in the home network:

https://www.heimnetzwerke.net/patchpanel-einfach-erklaert/

It explains quite simply how a patch panel is connected and connected to the router and switch in the home network. Maybe that helps a little to shed light on the darkness. With an inexpensive cable tester, you could then also be certain about the cabling.