I struggled for a while figuring out how to set the OAI Gateway IP, DHCP option for a Polycom NetLink 8030 wireless handset.
It is not documented anywhere on how to do it with a Windows DHCP server (only a Linux BIND server). We placed a call with Polycom and even they didn't know...so I thought I would share what I learned with forum members.

First you have to create the custom DHCP option for the OAI Gateway server.
-open the DHCP Management Console
-right click on the DHCP Server and select "Set Predefined Options".
https://i1091.photobucket.com/albums/i394/TekMason0/DHCP01.png
-click the Add button
-enter oai-server in the Name box
-select IP Address from the Data type drop down
-enter 152 in the Code box
-enter something in the Description box (I think this is only for your reference)
https://i1091.photobucket.com/albums/i394/TekMason0/DHCP02.png

Now you have to add the oai-server option to the DHCP scope that your 8030s live in.
-expand the server and scope tree
-right click on Scope Options and select Configure Options
https://i1091.photobucket.com/albums/i394/TekMason0/DHCP03.png
-scroll down through the list of available options and check 152 oai-server
-enter the IP Address of the OAI Gateway server and click OK
https://i1091.photobucket.com/albums/i394/TekMason0/DHCP04.png


TekMason
IP therefore I am