Topic: Telephone Feedback
I am using an inherited Valcom V-9940 to answer the phone and pass the tones and audio to an analog input on a nE. I have no issues decoding the DTMF tones or passing the audio to the system. I would like to provide some feedback to the user when the phone is answered and when a set of DTMF tones are accepted.
I have added the manual for the V-9940. I am using pins 6&7 to pass the phone audio to the NION.
Any ideas or recommendations?