Grandstream Networks GXP1625 Quick Start Manual page 10

If the Server Type is HTTP or HTTPS enter Hostname or IP Address, followed
then by /prov.
Example for Hostname using HTTP: abc.bicomsystems.com/prov
Example for Hostname using HTTPS: abc.bicomsystems.com/prov
Example for IP Address using HTTP: 192.168.1.10/prov
Example for IP Address USING HTTPS: 192.168.1.10/prov
Enter Auto Provisioning username and password into Config HTTP/HTTPS User Name
and Config HTTP/HTTPS Password fields.
If you choose to use server type TFTP enter Hostname or IP Address
Example for Hostname: voip.bicomsystems.com