IP Phones are kept up to date with latest provisioning changes and applicable firmware versions via two methods- Resync via the Zoom Web Portal or the IP Phone will initiate via Auto Polling/Pulling.
The Phone Administrator initiates the Resync via the Zoom Web Portal. This method is fully described here. Using the Resync method, the provisioning and firmware will be applied to the devices immediately. Therefore, it is suggested to target specific phones or perform this action in batch after working hours so as not to impact the phone user. The Resync action should be viewed as an administration feature for troubleshooting or configuring devices with an immediate need for the update.
The Auto Polling/Pulling mechanism is more passive in nature where the devices will check (Polling/Pulling) for updates on predefined dates/times specified by each device manufacturer. The IP Phone will check with the Zoom Phone service for any new configurations and if there is a new firmware version to apply. If there are any changes, the IP Phone will apply them at that time. This method ensures all the IP phones stay up to date with the settings including device software updates on a regular basis. For guidance purposes, subject to change by the device manufacturer, the polling is typically performed when devices are not in use (For example - weekends/after midnight). This polling/pulling method is the default method for Zoom Phone service.
See the following articles for related information:
Setting up firmware update rules
Terms and conditions for firmware update rules
Zoom Phone Appliances use the Auto Polling mechanism of the Zoom Device Management (ZDM), similar to Zoom Rooms. This software layer is integrated in the device firmware for multiple purposes including keeping it configured for Zoom Phone service.
ZDM will continuously and actively send Auto Polling messages back to Zoom servers once an hour. When the administrator configures Application/Firmware update rules, Zoom will check whether the current firmware and application of the device are consistent with the rules once it receives the Auto Polling message. If they are inconsistent, the update will be triggered immediately.
Therefore, in order to avoid affecting phone users, it is recommended that you turn on automatic firmware update/automatic app update and set the time range for allowed updates to off-duty hours.