I found the reason why....
It was not the Ring/Tip Polarity.
I was logged onto the KX-TVA50 to alter a couple parameters and found the CPC function was disabled. Setting the TVA50 to 150ms as well as the ATA solved the problem.
I suppose I forgot to re-enable the CPC function after having my TVA50 repaired serviced for defective flash memory where the software/firmware is stored.
One less small mental annoyance.
![confetti confetti](/forum/images/graemlins/default/confetti.gif)