hello, first thanks those people who have given advice to me. this time i shall register the special sip caller ,but not have anything registered. at the begin,i rename the freeswitch_combined.xml to freeswitch.xml,so i can configure all things in one .xml file. i have made the first configuration to test stuff out. then,when i want to register a special sip caller,though i have read the sofia.xml reference to configure it,the UA cant't reach it. is there some file else need to configure? because the freewitch_combined.xml which i have renamed to freeswitch.xml have not the #include to include sofia.xml, so i have to use #include to incude this file again.does this make sense? another question, in the freeswitch.xml it uses #include,and in freeswitch_combined.xml it uses <load module=...>.what's the difference betweem the two ? thank you very much! 百 万 同 时 在 线，人 山 人 海 同 玩 梦 幻 西 游