******************************************************* * Pre-Call announcement with B2BUA Application Module * ******************************************************* Description: ------------ The annoucement server plays a wav file to the caller. It searches for files to play following these rules: 1) [AnnouncePath]/[Domain]/[User].wav 2) [AnnouncePath]/[User].wav Then it connects the caller to the r_uri in Back-To-Back User Agent (B2BUA) mode, thus staying in the signalling path of the call.