Electricity at the house connection for provider - Installation of server cabinet

Oh, I see, then I may have expressed myself a bit unclearly. This is a 9HE wall cabinet, so not one of those huge things to put down.

9 HE will be quite tight; if the cabinet has not yet been purchased and you still have some space, I would consider going one size larger.

- Patch panel
- Switch
- Power strip
- DSL splitter / router
- Cable connection and distributor?

Then power supplies and cables will be added. If you want to upgrade with a NAS, a central media PC, IPTV, or anything else in the future, you will have problems.

9 RU? What are you planning? Switch 1 RU patch panel 1 RU and the other 7 RU? Do you have a large 4 RU server? And if so, what for :D

9 U? What are you planning? Switch 1 U Patch panel 1 U and the other 7 U? Do you have a big 4 U server? And if so, what for :D

Oh, 9 U fills up quickly if you're a bit tech crazy :D
For me, it will be a 42-inch floor-standing cabinet, luckily my wife isn't interested in the house connection room and everything that happens in it :p

But 9 U should normally be enough, I also installed one with 9 U at my father's place, it was a bit full with NAS etc., so the Fritzbox was moved onto the cabinet (which is better for reception anyway).

Oh, 9 HE fills up quickly if you’re a bit tech crazy :D
For me, it will be a 42-inch floor-standing cabinet, luckily my wife isn’t interested in the house connection room and everything that happens in there :p

Do you really mean 42" or 42HE?

My 42HE 19" cabinet is already overflowing and this winter I have to tackle untangling everything and moving it into an additional 42HE cabinet. One cabinet only DSL / LAN with 3 16-port patch panels, corresponding gigabit switches, router, and server with tons of drives as "NAS" with the family video library. The other cabinet then with the control unit of the house video intercom system, LAN control module for the heating (I moved it out so as not to block the boiler), and my alarm system with 2 16-channel DVR devices with sensor and analog camera inputs.

All the cabling takes up a lot of space despite cable "management" and you want to keep it somewhat organized. Particularly bad are the many alarm sensors, which I still want to supplement with smoke detectors/gas detectors. I can only connect those to my DVR model via an adapter that has to be distributed via screw terminals. I mounted those on a board as a 19" slide so I can still somewhat keep track. An uninterruptible power supply is also supposed to go in, which would be worthwhile with the 12V system.
Since during the house renovation I wired everything out to the bare walls and ceilings, the "locked-in" router doesn’t bother me much. I let the Telekom technician spool out so much cable until it reached into the cabinet and had my first TAE socket installed there. For the patch panels I left some HE free in between, otherwise I would only be able to reach those LSAs from the top if I dismantle the slide.

The power distribution is also done via several 19" power strips, but I still mounted a small separate socket panel outside on the wall. I dismantled the side panel of the cabinet that stands against the wall so I can access the wall sockets inside the cabinet. From this side I also do all cable feeds.

If there is space, in my opinion a size larger is the better long-term solution.

Have a nice weekend!