The system supports multiple conferences of up to 64 parties in total, including up to 2 external analog trunks in each conference.
1.Make a call to the first party that you want in the conference.
2.Once connected, press your phone's recall button (probably marked R or RECALL). The call is put on hold.
3.Make a call to the second part that you want in the conference.
4.When answered, press your phone's recall button again. The held call and your current call are put into a conference.