There will be a planned maintenance for the ATU Voice Over IP (VoIP) phone system on Wednesday, December 13th, starting at 5:30 pm and lasting until 6:30 pm. During this time, VoIP phones may reboot and VoIP services such as Jabber, faxing, calling, and voicemail may be intermittent or unavailable. This maintenance window will allow the Office of Information Systems to apply updates to the servers hosting the VoIP services.