Conference calls are a feature offered by Connexium that allows multiple people to participate in a phone call together. This is different from a three-way call, which only allows three people to be on the same call at once. They can be especially useful for companies with multiple locations, for employees who work remotely or for annual reports and large sales presentations.

Conference calls can be scheduled in advance, and multiple local phone numbers can be provided for participants to call in. A PIN is also generated to allow participants to log into the conference call. Additionally, it is possible to access any scheduled conference calls by calling an internal or external number.

In comparison, a three-way call is much more limited in its capabilities. It only allows for three people to be on the same call at once and does not have the same scheduling or access options as conference calls. Conference calls are a much more suitable solution for businesses with larger teams or more complex communication needs.