Avaya Vantage™ built-in UC experience provides visual alerts of an ongoing bridged call. You can join an ongoing bridged call if you are the primary extension owner or have the bridged call appearance of that extension.
For example, if the secretary makes or receives a call on behalf of the boss, the Avaya Vantage™ built-in UC experience on the boss's device indicates an ongoing call on the primary number. The boss can then tap on the active bridged call indicator to join the call.