Polycom RMX 1500 Getting Started Manual page 105

— Once the conference has started, participants can be added to a
conference directly from the Participants Address Book without
having to use the New Conference – Participants tab. For more
details, see "Adding Participants from the Address Book" on
page 3-62.
To add participants from the Address Book:
6 In the Participants List, click the Add from Address Book button to
open the Participants Address Book.
7
In the Participants Address Book, select the participants that you want
to add to the conference and click the Add button.
Standard Windows multiple selection techniques can be used in this
procedure.
Polycom RMX 1500/2000/4000 Getting Started Guide
3-25