First silly question: Are you using the same analog phone each time you test? Is it a "known-good" phone?

Second silly question: Is it the same user every time?

Third silly question: Is the analog phone volume turned sharply down?

Fourth silly question: Is the MDF and are all the IDFs clean and dry (no dust, no moisture, no green 66-blocks, no metallic dust on blocks)?

Silly as they sound, a lot of problems arise from "obvious" things like those that get overlooked... Used to service an aluminum mill that had four-wire Avaya phones. All their blocks were out in the factory floor, covered in oxidized aluminum dust. And lots of the wires would snap off the moment I touched them, from corrosion...

| VBC Salinas | Valley Baptist Church, Salinas - worship and prayer for Salinas California