The Cortelco external ringer offers a compact design. It comes with a visual ring indicator, letting you know when there's a call even from afar. You can easily adjust the volume with the low/high volume control. It also features phone and line jacks for easy connection.


Using the Cortelco external ringer is a breeze. First, connect it to your phone and line using the provided jacks. Once connected, you can turn it on and start adjusting the volume to your preference. If you want to know when there's a call without relying solely on sound, the visual ring indicator will light up. When it comes to maintenance, keep it in a dry and clean place. Avoid exposing it to extreme temperatures or moisture. If you encounter any issues, unplug it from the power source and check the connections.