Microsoft has released the CU9 updates for OCS 2007 R2 and the links for the updates are listed below.
After upgrading OCS the build numbers will be 6907.233.
Thanks to the Microsoft Sustained Engineering team for the info.
Originally I had planned on writing a few 'How-To' articles on OCS and SIP Trunks here on my blog, but then the opportunity to do the writing for Microsoft on the same subject came along. I am happy to announce that my first TechNet posting can be found at http://technet.microsoft.com/en-us/ff427414.aspx titled Configuring a Broadvox SIP Trunk in Communications Server 2007 R2.