I have the problems stated above. I was testing the voltage across contacts A and B of the incoming line in the BT80A junction box. The voltage read 36 volts. Lifting the handset it drops to 3 volts.
What should these two readings be? What could cause a lowered voltage?
I logged the problem with BT. The online diagnosis test said the problem was near or on my premises. A BT engineer apparently looked to the problem and said the similar thing, so I would have to make an appointment. So not wanting to be slapped with an approx bill of £130 ish I thought I would check connections, voltage etc within my home hence the question on voltage
Forget voltages, if you have no dial tone at the test socket behind the faceplate of the master socket, you have a line fault that is the responsibility of Openreach.
As long as you've tested all that still occurs (or doesn't occur) at the hidden test socket you can't be hit with a bill.