OIS offers limited support for VoIP telephones for the lab.
OIS can help you with technical issues you are experiencing on your WSLH issued cellular smart-phone device. Failure or loss of the actual device is an issue that should be reported to the Service Desk. We can also offer limited support for personal cell phones connecting directly to Exchange email.
There are videos, manuals, and other various resources available online, and of course, UW Voice Services.
https://kb.wisc.edu/search.php?q=Voip
https://kb.wisc.edu/vs/
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/AccessibilityFeatures/7800-series/PA2D_BK_A16369B6_00_accessibility-features-7800-series.html#PA2D_RF_H004BEA2_00
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/AccessibilityFeatures/8800-series/P881_BK_A8830007_00_accessibility-features-8800-series.html#P881_RF_H3F620DD_00