from master socket ( A & B terminals, unfiltered )
I assume you mean that the faceplate having an integrated filter has a passthrough for A+B in addition to 2,3,4,5 so you are not touching the terminals at the very rear of the master?
Modern phones are more likely to have their own circuitry to be able to ring from just the balanced pair. Some older phones needed help from the master's ring circuitry using the bell wire, but retaining this introduces noise (and unbalances the pair if I understand it).
If there is a significant difference with the bell wire disconnected Is it worth replacing the problem phone(s)?
Hope you're not offended if you've checked that your wiring (don't know if you used a cable tester)
- is using consistent colours rather than either of the pairs being split across different colours
- is not taking any sharp bends or being crushed at any point
- is not allowing any unused wire to make contact with something inside the sockets
prompt $P - Invalid drive specification - Abort, Retry, Fail? $G
prlzx on n e w n e t Max ADSL