Some users may be experiencing a busy or unavailable signal when trying to join a session via their phone.  We are aware of this issue and are working to increase our dial-in capacity for sessions, as we know this is an important feature.

Our existing telephony provider has a limitation in their inventory of phone ports and has therefore provisioned us with just a few hundred ports, which are shared across our entire North America region (for Collab Ultra and Original).

To allocate this allowance across this geography, we have implemented a per-session dial-in limit of 25 dial-ins per session.  However, when the total number of ports in the geography have been occupied, attendees will not be able to dial into their session.  We are in the process of transitioning to a new telephony provider, which will allow us to increase our total number of phone ports in the region.  We are anticipating this to be available in April.

In the meantime, please use the web version of Collaborate on your computer and your mobile device.  Do not use the dial-in numbers, as this will free up those spots for users with internet issues.  For additional best practices on how to use Collaborate, please see these best practices for Moderators and these best practices for Participants.

Thanks for your understanding and cooperation as we work to better serve our clients and ensure continuity of education for learners around the world.