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. Press VOLUME on the base to turn up the volume. 3. Try a handset and/or line cord from a working set. If this corrects the problem, replace the appropriate cord. 4. If you have connected this telephone to a phone jack that has not been used before, or that has not been used in sometime, there may be problems with this jack that you are not aware of. Use a telephone jack that you know is in proper working order. 5. You may have a line problem. To test for a line problem, test your unit at another location. If your unit works at another location, contact your local telephone company.