Meet-Me Conference Service
If you’re looking for a teleconference where users won’t be able to access a computer during the conference, UCLA has Meet-Me Conference Service, which allows you to setup a teleconference number for people to call in: http://www.cts.ucla.edu/products/catalog/product_group.aspx?groupid=G1049. This service is free for UCLA Faculty and Staff.
Update: Meet-Me Conference Service is now discontinued: https://www.it.ucla.edu/news/meet-me-conference-service-discontinued.
Please see this page: https://www.it.ucla.edu/services/phone-tv-radio/telephone/conferencing-services for other conferencing options.