Centrex is being retired. We are no longer accepting requests to install new Centrex lines. 


About this service

Provided By

Other names for this service

Centrex has also been referred to as "legacy voice" as well as "landline" phone service.

Service documentation

Why to use this service

The needed power is integrated with the service itself, eliminating the need for an addition source of power.  In addition, as an analog service, Centrex supports a wider range of special equipment (modems, alarms, strobes) than IP telephony service.


AT&T Unified Messaging, long distance, automatic call distribution.

Getting and using this service

Who can use this service

Undergraduate students
Graduate/Professional Students

How to get this service

Requests for Centrex services are submitted by Pinnacle Department Managers as service requests via Pinnacle. Requests to install new Centrex lines are no longer accepted pending the planned Centrex retirement.


A basic Centrex line has a $65 one-time installation charge and $22.60 per month recurring charge with additional charges for non-standard Centrex features (voicemail, speed dial, extensions, etc.)

How to use this service

Requires telephone instrument plugged into the terminating jack.

Quotas and usage restrictions

Long distance restrictions apply as requested

Sensitive data considerations

Not applicable

Hours and support

Standard service hours

8:00 a.m. to 5:00 p.m. Monday through Friday, after hours support is available for life safety concerns

Scheduled maintenance hours

Scheduled by the vendor

Staffed support hours

8:00 a.m. to 5:00 p.m. Monday through Friday

How to report issues

Contact the Technology Services Help Desk by phone (217-244-7000) or by email (consult@illinois.edu).