Do the default settings for dial pulse do a good job on on old black bell phones from the late 50's?
I set transmit and receive to 12 dB but the audio is still a little weak. Do I need to change the impedance?
I also set the ringer to 80V but I am still unable to register even by using a DMTF recorded set of
tones into the microphone
Please stop posting the same questions over and over in multiple places.