UDM Pro uses the Rest API as one of its methods to reboot phones. When troubleshooting issues with rest API reboots, it is helpful to understand what is causing the issue, the phones (i.e. its config) or in UDM Pro.
This guide will help you send a Rest API reboot command to the phones from a source other than UDM Pro. This way you can rule out the phone or UDM Pro in your troubleshooting.
Instructions
Download and install Postman. You can download this application here: https://www.getpostman.com/downloads/
Once Installed, open Postman.
Click on the dropdown to the left of the URL field and choose “POST”
Enter the following URL: https://<phone IP address>/api/v1/mgmt/safeRestart (replace <Phone IP address> with the actual IP address of the phone).
Under the URL Field, Select “Authorization”, Choose the “Basic Auth” as the Type and enter the following credentials:
Username: Polycom (make sure the first letter is capitalized)
Password: <Your phone admin pin>
Next, select “Headers” and add the following values:
Key: Content-Type
Value: application/json; charset=utf-8
Like the screenshot below:
Now you are ready to send the reboot command. Go ahead and click Send.
Check for ‘2000’ return code or check to see if the phone rebooted.