Bear in mind ring is a diy product not a professional one. But any wifi device can be jammed.
You always want to have on site recording and ideally cabled. Some people reley on edge recording (sd card in the device) but if the device is removed the footage is gone too.
I'm sure you can balance it with different values. I'd test with different values and see but you might be able to calculate the swr. Can you add capicitance on the run?
Your big issue is going to be reflection. Stick a scope on it and look. Or go back or recable
I also do that and no i cannot. There is a mod to connect to the cloud service but polling is slow as its pulling from the cloud. I use output modules and an esp32 to get the events from my hkc 10270. I have wifi gsm on the app (and a dualcom)
rs485 'should' have termination resistors. Might help if your cable is truly shocking. Ive run rs485 2.5 miles as a test in the ancient past but on twisted pair belden
Yes needs a firmware update very old software.
You may also need to turn off some of thepolice options. As its a proper panel it is setup for police response out of the box.
Also the 4g modules etd wont work without an update