On macOS Mojave (likely previous versions too), Ringcentral.app (aka Glip) ignores the Notification System Preference setting for "Alert" and only uses "Banners".
Alerts are preferred because they stay on screen until dismissed, so it would be a good way to make sure you get notified about important Glips.
Thanks

Alerts are preferred because they stay on screen until dismissed, so it would be a good way to make sure you get notified about important Glips.
Thanks

Site Info: US - Technical Service - 80+ users RingCentral.app/Glip Version: 19.01.2 (E. 2.0.1) Build: 396 (rev. 771473b)