On the Meetings & Offline tab, You'll see your meeting under Meetings & Events. Click the "Info" tab to see your meeting's public information settings.
This includes the participation options you've selected, such as Phone, Text, & Email options to collect participant comments, as well as your meeting description. You can edit this information on the fly by clicking "Participant Options" under the Info tab.
If you're asking participants to call in, be sure the phone box is checked so that the phone number is visible on the public meeting. Participants can email and text in comments too, if those boxes are checked.
Click Save, or Save & View Live Site if you want to see these settings on your meeting on the live meeting page.