Polycom HDX series Enter the IP address of the device in your browser. Enter your username and password. Click Admin Settings and navigate to Network > IP Network. Configure the following: Enable IP H.323. Enter the H.323 Name. This is the extension of the device. Enter the H.323 Extension. This is the extension of the device. Select Specify for Use Gatekeeper field. Enable Authentication and enter the extension in the User Name field. Enter the Gatekeeper IP Address in the Primary Gatekeeper IP Address field. Enable H.460 Firewall Traversal. Click Update. Configure LDAP Navigate to Global Services > Directory Servers. Configure the following: Enable LDAP. Enter ldapexport.lifesizecloud.com as the Server Address. Enter the Server Port. Enter the Group Name. Enter the Default Group. Enter o=cloud, dc=lifesize, dc=com as the Base DN (Distinguished Name). Select Basic as the Authentication Type. Enter uid=<extension> as the Bind DN (Distinguished Name). Click Update.