1. While on a call, click the Add participant soft key, the caller is put on hold
2. Enter the number of the 3rd party you wish to add
3. If the caller does not answer, press Return to held.. to go back to the original call
4. Press the Start Conference soft key to join the calls
5. To add more people to the call press Add particpant soft key
6. Enter the number of the next party you wish to add
7. Press the Conference soft key to join the calls