If someone calls my number, I pick up but the phone still rings (D-Link 601 Router)

You may need to complete a  firmware upgrade on the D-Link 601 Router. To complete this action, navigate to   the D-Link Firmware FTP server and find dir601_firmware_101NA. The incompatible firmware on your router may be dir601_firmware_100NA

Note: Fongo is not responsible for third party software downloads or hardware installed by the Customer which may alter the Service connection, the Customer's system configuration or which may prevent or alter internet connection, speed, or service or have any other impact on the Service.