When taking home a Glenbard issued Cisco 8861 phone or bringing back a phone that was used remotely, you need to reset the service mode. 1. Go to Settings 2. Click Admin Settings 3....
If you are using a Cisco 9971 phone here is a guide on each of the buttons and the functions that they do.
Your desk phone, or the phone in your classroom, has a couple quick steps on how to use it. You can dial another extension, dial an outside number, and check the voicemail.