Thanks George. That is what I was kind of thinking. So I went ahead and tried to apply the patch to one of my ArcGIS Server 10.3.1 machines. And it gives me an error:
"The upgrade patch cannot be installed by the Windows Installer service because the program to be upgraded may be missing, or the upgrade patch may update a different version of the program. Verify that the program to be upgraded exists on your computer and that you have the correct upgrade patch."
I checked the ArcGIS Server Patches and Updates page and a similar utility& telecom patch does not seem to be available for the 10.3.1 version. http://support.esri.com/EN/downloads/patches-servicepacks/list/productid/66
So can I assume that it is not needed?