- Plug the provided phone cord into the TEL port in the back of the Chattaway and the other side into a wall phone port (or modem)
- Use the short pigtail cable to plug into the TEL port in the back of the M22 amp and the other end into the headset port on the side of the Chattaway
- Grab the headset and plug it into the headset jack in the front of the M22
- Make sure the batteries are installed in the amp and turn it on
Note: compat is unknown, but likely the default. But play around with it, if you must.