Technology

Cisco IP Phone

Last modified 2/18/2025

Voice over IP (VoIP) is a communication technology that allows telephone calls to be placed using a broadband network instead of a regular analog phone line.

Telephone Models

Four models of VoIP desktop phones are available for use on campus:

  • Cisco IP Phone 7811s – VoIP phone with High resolution, graphical grayscale display for easier viewing. More Information.
  • Cisco IP Phone 7945 – Standard office VoIP phone on campus
  • Cisco IP Phone 7965 – VoIP phone with six programmable buttons
  • Cisco IP Phone 7975 – VoIP phone with eight programmable buttons and a touch screen
  • Cisco IP Phone 7841 – VoiP phone with 4 programmable buttons
  • Cisco IP Phone 8841 – VoiP phone with 8 programmable buttons
  • Cisco IP Phone 8851s – VoiP phone with 8 programmable buttons

The 7965 and 7975 can both accept an optional sidecar which contains twelve additional buttons, and each sidecar allows for two “pages” of buttons. In effect, one sidecar can store a total of twenty-four phone numbers.

How to Get Help

Technical assistance is available through the Illinois State University Technology Support Center at:

You must provide the following information:

  • Your name, ULID, and a contact phone number where you can be reached (which might be different from your VoIP phone number, especially if that phone is not working properly).
  • Building and room where your VoIP phone is located.
  • Port number to which your VoIP phone is connected.
  • Phone number of the VoIP phone that is experiencing problems.