Good evening forum, I have some doubts about the CPE of the title

If with a 5210G I have a range of 1.5KM where there is a customer with a 7210N and its ACK distance is well calibrated and has good throughput (14mbps). Can't I connect devices that are in the middle of the signal with good throughput? , like others that are 1KM or 300Mts away, can I only connect with ones that are at the end of the distance with good throughput?

In this case I have a CPE TL-WA5210G V1 with firmware 4.4.8 Build 130502 Rel. 61441n in AP Router mode

Also another question, how can I identify if the PoE injector is original? I have a problem with a TL-WA7210N that if you are in the configuration for a long time, it starts to be in a restart loop and I suspect it is the PoE injector. If I don't enter the configuration the CPE works fine. The PoE injector is quite different to the 5210's PoE , the 5210G injector have metal plated RJ-45 connectors and that 7210N PoE have common yellow plastic connectors and a plastic case that looks like inferior quality than the 5210G's injector. Both have the TP-LINK logo

 Another question is how to configure the signal indication LEDs on the 7210N. I don't see anywhere where to configure it. It is in WISP mode

that CPE is a TL-WA7210N V2 with latest firmware available

Sorry . i have set a wrong model because the 5210G and 7210N doesn't show in forum model list