sunshineh wrote

OK, I understand. But can I use this port also as switch directly?

Yes.

sunshineh wrote

And can I connect on the LAN Port my PoE Camera und only supply the CPE510 with power on his PoE port?

Without powering the Cam: yes. With powering the Cam via PoE: no. You would have to connect the PoE Cam on the second LAN port of the CPE and enable PoE pass-through in the web UI to have 24 volts available for the Cam. Make sure that the Cam uses passive PoE and consumes not more power than ~10 to 12 watts (0.5 A @ 24 V).

Do you now a power supply for this router that looks like a LAN cable but has only the power and no LAN connection?

Not sure what you mean. If you don't use the LAN port of the PoE adapter included with the CPE510, it's supplying just power through the adapter's PoE port w/o any LAN connection. You still can use the second LAN port on the CPE, with or without pass-through of the 24 volts.

sunshineh wrote

Is it possible to switch the LEDs off on the CPE510?

No. Why would you want to do this?

For which distance can I use the CPE210 without antenna?

You cannot use it at all without its antennas, they are built-in. Or do you mean the maximum distance for standard client devices with much weaker antennas such as tablets and smartphones? Depends on the client devices and wether they are located in the area covered by the CPE's (directional!) antennas. Usually this distance is up to ~70m at free LoS, sometimes a bit more or less.

sunshineh wrote

Is it possible, to use the internal antenna of a WBS210 to connect over 2.9km AND at the same time to use one of the external antenna connectors to have a little local wifi?

Sunshine, there seems to be a lot of confusion. The WBS210 does not have an internal antenna. The CPEs have internal antennas.

The WBS210 is best used with directional antennas (two of them due to 2x2 MIMO). Theoretically you could replace those antennas by omnidirectional antennas, but then you would have no directional antennas anymore. It's best to use any indoor AP for local coverage such as a cheap TL-WA901ND or - if you need local coverage outdoor, too - the EAP110-Outdoor in addition to the WBS/CPEs with their directional radio links.

BTW, just announced as a new product: omnidirectional outdoor antenna for the WBS210: http://static.tp-link.com/TL-ANT2410MO(UN)_V1_Datasheet.pdf