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User Guides

Below are User Guides and Quick Reference Guides for telephone and voicemail services:

Voicemail System

Avaya (Legacy) Telephone System

Mitel Clearspan (VoIP) Telephone System

6867i Desk Phone

SOFT PHONES (Clearspan communicator)

* When prompted for a URL enter:

Clearspan Web Portal

To order any services or to report a problem or outage, contact the Support Desk at 312-567-3375 or

For People With Disabilities

If anyone with disabilities needs assistance with telephones or voicemail, please contact the OTS Support Desk.
Phone: 312.567.3375 (on campus x7Desk)