In article , Don Bowey
wrote:

Good discussion, but one small correction: When you dial, the dial contacts
open the current path and then close the path for each pulse. During the
time that set of contacts is open, another set is closed, shorting out the
earpiece so there is no click in the ear. The CO reads each pulsed
open-interval. When the string of (one to ten) open pulses completes, the
current path is simply maintained by the closed dial contacts.

Don-

I stand corrected, as Ken also noted.

From your explanation, it would seem that Adam should look for an open
earphone connection as one possible cause of his symptoms.

Fred