I installed a splitter with new jack last month and got around this WE to move modem and make connection. Modem is not responding, though I get a dial tone. I connected a phone to that new jack and called my cell. This works fine.
I reconnected my modem, and I get a blinking light, and 2 solid lights, and no connectivity to the internet. I had to move the modem back to its original location. There, I get 3 solid lights.
Any advice is greatly appreciated.