TA 624 has 2 doorphones, back door was installed for a year, & they decided to put one on the front door. They have 3, 7885 cordless phones, & they rang OK before I installed the 2nd doorphone, but now they have a very weak ring when either doorphone is activated. ?? help!!

pfonman

That shouldn't have any bearing on the cordless sets at all.
It could just be a coincidence and the batteries are all getting low on the 7885s.
Disconnect the 2nd doorphone and see if that actually makes a difference.
You are using a dedicated run for the new doorphone and not an extra pair in a run feeding one of the cordless bases correct?