I have just installed an i-pate to my master socket. This increased download speed form 5.5 up to 8.2. Attenuation down from 40 to 32 and S/N margin up from 11 to 15. Nice !!
However...I now have an engaged tone on my master phone and all extensions. Phone calls work in and out with no prob. Thought it may be temporary, but it is now a few hours since I added i-plate. Tried reverting to socket without i-plate and problem persists ! Tried phone straight into test socket - same prob !!
Any thoughts please