VDB770 Not Ringing Panel

Hello,

Records indicate the Panel’s firmware is outdated. You can follow this link to a guide for updating your IQ Panel 4. This will eliminate any known troubles and utilize the newest communication enhancements.

Following that, at this link you can find some troubleshooting steps for a like-model which include ensuring the chime on the panel is enabled.

Please let me know if you continue to have trouble or have any other questions.