How make the conference in softphones

Hello EveryBody , I need help from U. please help me in How make a conference in softphones. On Which modules have work. I recently install tested the softphones . that a calls are made . And When I looked into Location table . in that table records are insert. immediately when the system restart or when softphone is discarded the " location table " records are disable. Please help me in that.. And please Excuse me, In my English . Bye -- Thanks and Regards with cheers Sunkara Ravi Prakash (Voip Developer) Hyperion Technology www.hyperion-tech.com