How to manually insert the provisioning URL in a Grandstream
NOTE: You can set your IP phones to retrieve the provisioning URL automatically via DHCP 'option 66' AND TFTP. This is recommended for larger networks but requires a TFTP server to be setup (free versions are available). For more information, see this configuration guide
After you have created the extension in 3CX Phone System, and entered the MAC address of the phone as well as specified the model, you need to configure the phone to retrieve the configuration from the 3CX Phone System HTTP server:
- Switch on the phone. Once the telephone set is booted up, the phone set’s IP will be displayed on the screen. Keep a note of the IP Address.
- If the phone set was used before, reset the phone set to factory defaults. To reset to factory defaults, follow the steps on page 29 of the phone set’s manual (http://www.grandstream.com/user_manuals/GXP2000QuickInstallGuide.pdf).
If the phone is new you can ignore this step.
- Assuming that the phone set’s IP is 10.172.0.127, use a web browser to access the phone set’s configuration, using this URL: http://10.172.0.127.
- When asked for the password, input the phone set’s password. The default password is “admin”.
- In the “Firmware Upgrade and Provisioning Section”, select Upgrade Via HTTP and in the “Config Server Path:” input http://10.172.0.116/management/provisioning. The IP must be the IP of the 3CX Phone System machine.
If using Cassini or Apache (v6), the URL is: http://10.172.0.116:5481/provisioning
- In the “Allow DHCP Option 66 to override server” option, tick No, as shown in the screenshot above.
- Save the configuration and reboot the phone
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- Click on the Update button at the bottom of the page to save the new HTTP provisioning settings.
- Once configuration changes are saved, click on the Reboot button to reboot the phone set and retrieve the configuration from the 3CX PBX Phone System.
IMPORTANT: Screens may vary depending on firmware versions.
SIP Phone Configuration Guides 
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