Caller ID/Call Waiting. Digital Answering System</br>Extra-Large Tilt Display. Backlit Display. Audio Assist</br>Extra-Loud Ringer</br>DSL Subscribers may need to us a DSL Filter</br>Note - This telephone provides minimal functionality during a power failure. When AC power is not available?? the screen is blank and many telephone features do not function. Only touch-tone dialing and handset volume adjustment are supported</br>Extra-large buttons: Enlarged font and extra-large keys make the keypad easy to use. This feature is especially helpful for those who are visually impaired</br></br>Product Description</br></br>Cl4940Wht- Corded Answering System.Troubleshooting steps as follows:1. If you are having trouble hearing on the handset?? try replacing the handset cord.  2. Please check if you can hear the dial tone. The volume may be turned down too low to hear the other party.  Pre