Yes, that is possible.

I don't understand your question. Is it about PoE (Power over Ethernet)?

Of course there is one.

Unfortunately, we are unable to answer your request. You should contact your operator. Or our customer service: https://helpcenter.digitec.ch/hc/fr/requests/new

No, but the LEDs are not very bright. If I don't look at the unit from above at night, I can't see whether it is switched on at all.

You can select "Ethernet Bridge Mode" or "Bridge Mode" during configuration: https://www.reichelt.de/reicheltpedia/images/2/2c/WLAN-Router-AP-Bridge-Switch-PC.jpg

I cannot answer the question. I only use the part as an access point.

Yes - I think so if the Swisscom TV Box also supports WPS. However, I would only advise you to buy the WAC104 if you know enough about how to configure it on your notebook. It is NOT set to DHCP by default. The tool on Netgear.de with http://www.aplogin.net to get to the login of the WAC104 with an assistant in the browser does not work. This means setting the IP of the notebook manually - and reading the manual beforehand. Then switch everything to DHCP. Good luck.

Yes, that is possible.

It is not the antenna that makes a difference when channels are occupied. The antenna makes a difference in the coverage distance and hence data traffic at the same distance from the router. This router is able to change the associated channel (by default it is on 6), also if your devices are compatible you can use the 5ghz which is freer. Maximilian