Abstract: Audio conferences between multiple participants may be conducted without preconfigured passcodes by associating a toll line with a particular conference partner. Users of a conferencing system may dial the toll line and enter a passcode. The first user to enter may enter any passcode of their choosing, such as a passcode agreed to by other conference participants. If no conference with that passcode is currently executing on the conference platform, a new conference is activated. Subsequent users who enter the same passcode are joined to the conference.