Works well. My phone system could only ring up to 14 phones, but once I connected one of the two panels to the RG-10A, I was able to have the phone in every room plugged in. The only problem I have is when I use a rotary telephone, even if I just answer with it (no dialing), the RG-10A will loop, which means the phones in the house won't ring again. My work around is to only use rotary telephones on panel that is not connected to the RG-10A.
A good solution for driving several phones when Verizon threatens to cut you off unless you change from copper to FeeOs
I coincidentally was having a problem with a Cell2Jack Bluetooth adapter going into a Merlin 820 phone system. The Cell2Jack wasn't ringing and I got no L.E.D. indication on incoming calls in the Merlin system. I tried the ring booster and it corrected the problem. My intention when I bought it was to drive several phones from a ZTE wireless phone base and it does that job too.