Avaya J129 - Page 28

• No: This option indicates that the phone should not use DES and should discover the
configuration server using the existing mechanism based on DHCP option 242. If the phone
fails to discover the configuration server using DHCP option 242, it will prompt the user to
enter a configuration server manually.
• Timeout: After the interval of 60 seconds, if no option is selected, the phone will use the
existing mechanism based on DHCP option 242. If the phone fails to discover the
configuration server in this case, it will contact DES to get the configuration server URL.
The following diagram shows the flow of DES discovery procedure:
Activate
auto config?
DHCP Option 242
DES
Config URL
found?
Connect to
config URL
Config URL
found?
DHCP Option 242
Config URL
found?
Connect to
config URL
Done
Enrollment
code?
Connect to
config URL
Success?
Prompt for
Config URL
Code
Yes
Yes
Yes
Yes
Yes
Cancel
Bootup
Timeout
No
No
No
No
No
Initial setup and connectivity
July 2019 Installing and Administering Avaya J100 Series IP Phones 28
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