Adapting a Telephone Handset to a Cell Phone

Step 7 Final Words

You will probably have noticed that there is a button on the microphone enclosure that can be used to pick up, or mute, a call. This normally-open pushbutton shorts between the microphone wire and return. If you want to incorporate a button with this functionality onto your handset, be sure to test it out before drilling any holes in your handset. Some phones need a very low resistance short between the microphone wire and return when the button is pushed, and many coiled cords are too resistive.

In any event, have fun!

Comments

[Frmeyers]

Thanks! Really clear ible instructions. I have been looking for a handset for a friend who is blind and has trouble with how close to hold my iPhone when on speaker. This is exactly what I needed.