Update 4:30 p.m.:
Teams Calls service for physical device Teams phones is now available, and issues reported earlier today are resolved.
If you are still experiencing issues using physical Teams phone devices (such as desk phones), please reboot the device (unplug it from power, wait for it to turn off, then plug it back in).
Thank you for your patience. If you are experiencing issues accessing Teams Calls via computers or other devices, or need help with other IT services, please contact the IT Service Desk: it@umass.edu or 413-545-9400. More ways to get tech help.