Conference Call System is a conference platform used to connect enterprise with outside contacts, branch telephones, personal mobile phones, etc. If no video or images are required, people at different locations can make a conference call by simply using their telephones or mobiles to dial the unique number of conference call platform.

Meantime, in order to ensure the reliability of conference system, the telephone conference system can be used as a supplement for a video conference system. Participants in telephone conference system and the participants in video conference system can speak, listen in the same conference. If an individual access point fails in video conference system, local telephone can be used to access the telephone conference system and continue the participation in the conference.