This article will explain how to provision the GRP26xx Series (GRP2612, GRP2612P, GRP2612W, GRP2613, GRP2614, GRP2615) running firmware version 18.104.22.168 or earlier. This is due to a bug in the firmware where 3CX auto provisioning is disabled but required for auto provisioning using Zero Config.
- Login to your GRP26xx IP Phone and navigate to Maintenance > Upgrade and Provisioning > 3CX Auto Provision and ensure it is enabled:
- Save and Reboot the Phone.
Note: If you have upgraded the firmware which includes a fix for this, please ensure that you have check this setting or factory defaulted the Phone as configuration settings will be preserved with firmware upgrades.