In reading the release notes for the DST 2007 Update (http://www.cisco.com/cgi-bin/Software/Tablebuild/doftp.pl?ftpfile=cisco/crypto/3DES/voice/callmgr/4.1/ciscocm.4-1-3-2007-DST-Update.1-0-1-readme.htm&app=Tablebuild&status=showC2A) it says "Step 4: The Publisher will be rebooted at the completion of install. After the Publisher is back up, each server in the cluster must be rebooted in a sequential fashion, starting with the TFTP server and backup CCM Servers.". Just to be clear, you do NOT need to install the update on any Subscriber, TFTP server...etc, just reboot them after it has been installed on the Publisher? Thanks!
You need to do the OS update on all the servers, and the 4.1(3) SR on all the servers, and upgrade the phoneload/firmware to a fixed version for some 7900 series phones (java based ones - ie: 7941/61/70/71, etc). See the DST field notice for the Unified IP Phones for details.
Then when you have all above updated, etc do the CCM DST patch on publisher. The readme for the CCM DST patch does explain this in good depth as to what order things need to be done in.
Main DST page:
IP Phone Field Notice for DST:
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