During the first boot-up, you can disable the Device Enrollment Services discovery in one of the following ways:

• by setting the DES_STAT parameter to 0 or 1 in DHCP option 242

• by setting the DES_STAT parameter to 0 or 1 in the 46xxsettings.txt file

• by disabling DES Discovery in the phone web interface (Management > Device Enrollment Service > DES Discovery)