And suddenly I know when people are using their phones
I upgraded Cisco Jabber from version 9.x to 10.5.1 last week. Since then I've been getting notifications on my Mac that someone is making a phone call or logged onto Jabber. I finally found the Events setting that told Jabber to annoy me constantly. I've since unchecked it.
Select Preferences. . . from the Jabber menu. Select the Events tab and look for the event Contact signs on. By default sound is off, Dock Bounce is off but Visual is checked. If checked you will get notified if users that you have added to your Jabber contacts log into Jabber or make phone calls. Since I don't care for this information I unchecked it.