When you enter iMeet®, you'll see a panel pop up labeled "Connect Your Audio". From here, you can connect your audio in one of three ways:

Option 1.  Call My Phone.   Input your telephone number and iMeet will call your phone and enter the audio key if you are on a mobile device.   

Option 2.  Dial In.  Manually dial a listed number and enter the audio key when prompted.  

Option 3. Use My Computer.   iMeet dials out to you via a VoIP connection using your computer headset. You will be prompted to Allow or Deny iMeet's access to your camera and microphone. Click Allow

Note:  You can pull up the "Connect Your Audio" panel by clicking the phone icon that appears when hovering over your cube OR by clicking the Connect button at the bottom of your iMeet room.