I work in a kitchen, sometimes pretty noisy. Any help on a visual indication of an incoming trunk call would be appreciated. I'm ex telco,ATT etc. have some experience.
Make sure you have an analog port available and connect it to this: Wheelock PS-11A-WPW strobe indicator. This requires telephone line or analog extension ringing at 40-130VAC, 15-68 Hz.
Then make sure the analog port is in the ringing group. Or that the pots you wanted has the correct voltage