Common procedures found in the RCA 25204 User Manual include:
Ensure the AC power adapter is securely connected to the base and a working outlet. Verify that the line cords are plugged into the correct L1/L2 ports. Rca 25204Re1 Manual
This feature requires a subscription from your local phone service provider. Common procedures found in the RCA 25204 User
Use the Vol (+/-) buttons to navigate the menu to "PHONE SETTINGS." Press Sel/Save to enter submenus and Exit to go back one level. Rca 25204Re1 Manual