http://blogs.technet.com/jenstr/archive/2008/12/08/when-do-you-need-to-use-dhcp-option-119-with-ocpe-powered-devices.aspxIn our documentation we tell you to use the DHCP option 119 when you deploy Office Communicator Phone Edition (OCPE) powered devices. But why do you need it? It has to do with how the device can find a domain controller (DC) to talk to. You can sign inen-USCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.technet.com/jenstr/archive/2008/12/08/when-do-you-need-to-use-dhcp-option-119-with-ocpe-powered-devices.aspx#3172971Wed, 24 Dec 2008 19:02:53 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3172971Rui Silva - UCspotting<p>I recently had to upgrade 2 LG-Nortel IP Phone 8540 (aka Tanjay or OCPE) to the latest firmware available:</p>