The user can initiate an ad hoc conference by using the Select and Join softkeys.
To choose conference participants during an established call, perform these steps:
This makes it an ad hoc conference. Up to 15 established calls can be added to the ad hoc conference, for a total of 16 participants.
Cisco CallManager treats the ad hoc conference the same way it treats an established conference by using the Conference softkey method.
Note: This feature is only introduced in Cisco CallManager 4.0.
For more information, refer to Conference Bridges.