Are you experiencing a specific symptom like ?
The DPRA01 connects to an indoor monitor using four wires. Colors may vary by region, but the standard per the manual is:
station. This link is non-polar, preventing damage from reversed wires.
For older models like the DPRA01, the manual is sometimes hosted on their legacy server. One known working pathway is:
Press the button on the handset while the conversation is active to unlock the door. 4. Troubleshooting and Safety