Configuration of DHCP option in Windows Server 2008

For the automatic configuration of elmeg IP telephones, the DHCP server transmits the address of the auto-configuration server in addition to the standard DHCP options. The DHCP server uses the DHCP option 114 in order to transfer a URL to the elmeg IP telephone. This option can also be configured in the DHCP server in Windows Server 2008.

  1. Go to Server Manager -> DHCP Server -> Windows 2008 -> IPv4.

  2. Click on the option Set Predefined Options...

    Server Manager -> DHCP Server -> Windows 2008 -> IPv4

  3. When in the Predefined Options and Values context menu, click Add in order to create a new DHCP option.

Predefined Options and Values

  1. You can enter any name under Name, e.g. URL for Elmeg Auto-Provisioning .

  2. The String data type must be selected for the automatic configuration of elmeg telephones.

  3. Enter the DHCP option 114 under Code.

  4. Enter a description for the DHCP option, e.g. DHCP Option 114 for Elmeg Auto-Provisioning .

  5. Confirm with OK.

A URL (auto-configuration address of elmeg hybird telephone unit) can then be saved for the newly created DHCP option. This URL is notified via DHCP to the IP telephone for automatic configuration.

  1. Go to Server Manager -> DHCP Server -> Windows 2008 -> IPv4 -> DHCP Range -> Range Options.

Server Manager -> DHCP Server -> Windows 2008 -> IPv4 -> DHCP Range -> Range Options.

Proceed as follows:

  1. Click on Configure Options. The desired DHCP options can be enabled and their content can be configured in this menu.

  2. The option 114 which has already been created must be enabled for the auto-provisioning of elmeg IP telephones.

  3. Enter the URL of the elmeg hybird 120™ http://192.168.0.250/eg_prov/ under String Value.

  4. Confirm with OK.

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