Why is SEP 12.1 RU2 making requests to symantecliveupdate.com?

I need assistance on trying to figure out why my machines are attempting to reach out to the following location.  Our current LiveUpdate policy states that no machines should go to the Internet to pull updates.  They are only suppose to hit the SEPM or GUPs.  Can someone explain what these requests are and what portion of the policy configuration directs these requests?  The list of requests I see repeatedly are below.

http://liveupdate.symantecliveupdate.com/sepc$20behavior$20and$20security$20heuristics$2012.1$20ru2_microdefsb.curdefs_symalllanguages_livetri.zip

http://liveupdate.symantecliveupdate.com/sepc$20cids$20signatures$2012.1$20ru2_microdefsb.curdefs_symalllanguages_livetri.zip

http://liveupdate.symantecliveupdate.com/sepc$20extended$20file$20attributes$20and$20signatures$2012.1$20ru2_microdefsb.curdefs_symalllanguages_livetri.zip

http://liveupdate.symantecliveupdate.com/sepc$20iron$20revocation$20list$2012.1$20ru2_microdefsb.curdefs_symalllanguages_livetri.zip

http://liveupdate.symantecliveupdate.com/sepc$20iron$20settings$2012.1$20ru2_microdefsb.curdefs_symalllanguages_livetri.zip

http://liveupdate.symantecliveupdate.com/sepc$20srtsp$20settings_12.1$20ru2_symalllanguages_livetri.zip

http://liveupdate.symantecliveupdate.com/sepc$20submission$20control$20data_12.1$20ru2_symalllanguages_livetri.zip

http://liveupdate.symantecliveupdate.com/sepc$20virus$20definitions$20win32$2012.1$20ru2$20h_microdefsb.curdefs_symalllanguages_livetri.zip

http://liveupdate.symantecliveupdate.com/sepc$20virus$20definitions$20win32$2012.1$20ru2$20h_microdefsb.error_symalllanguages_livetri.zip

http://liveupdate.symantecliveupdate.com/sepc$20virus$20definitions$20win64$20$28x64$29$2012.1$20ru2$20h_microdefsb.curdefs_symalllanguages_livetri.zip

http://liveupdate.symantecliveupdate.com/sepc$20virus$20definitions$20win64$20$28x64$29$2012.1$20ru2$20h_microdefsb.error_symalllanguages_livetri.zip