Hi all Sorry to trouble you ,but I really came across a problem still remaining unsolved when using freeswitch to develop some features. Assume that Bob calls Alice, before Bob here the ringtone of Alice,may be a clip of music. When bob use voip phone, after he dials, maybe there will be a bit longer time before he receives the ringtone. I want to play some music in this period. Here is the diaplan config The path is :/usr/local/freeswitch/conf/dialplan/default/call.xml Here is the content: </extension> <extension name="testlua"> <condition field="destination_number" expression="^(\d{4}\d+)$"> <action application="playback" data="voicemail/qav_video_incoming.wav"/> <!-- just for test replace it later--> <action application="lua" data="gen_dialplan_xml.lua"/> </condition> </extension> </include> The lua scripts “gen_dialplan_xml.lua" have to set some arguments for the session and finally it calls freeswitch.bridge(session,newsession) Assume that the time when entering the bridge function is t1, and the time when the ringtone of Alice arrives is t2, thus a time of (t1— t2) exists. I want to play a music to Bob during this time. But the action of “playback” and “lua” seem to be applied sequentially, that means ,the music is not played during the (t1—t2)time. I also tried <extension name="testlua"> <condition field="destination_number" expression="^(\d{4}\d+)$"> <!--action application="playback" data="voicemail/qav_video_incoming.wav"/--> <!-- just for test replace it later--> <action application="set" data="hold_music=${sound_prefix}/voicemail/qav_video_incoming.wav"/> <!-- just for test replace it later--> <action application="set" data="tmp_hold_music=${sound_prefix}/voicemail/qav_video_incoming.wav"/> <!-- just for test replace it later--> <action application="lua" data="gen_dialplan_xml.lua"/> </condition> </extension> </include> And the music file does exist, but it still did not work. How could I complete this feature?Do I have to complete this in the lua scripts? Than you in advance,looking forward to your reply.