Hi Zachary,

Great question, on the B3000n we user the Call button to initiate a "panic"

This is the documentation on how to set up Emergency Broadcast Groups. This would need to be configured before the Call-double-tap on the B3000n will work.

Source: Vocera Voice Server Administration Console Guide

You can reference this Vocera B-Series Badge User Guide and scroll down to this section:

There is no change in behavior for the B3000n badge, and the following behavior still exists:

• DND button―Places the user in DND mode. An inbound caller is offered the option to breakthrough.
• Call button―Places a call to the target destination. If the badge user has accidentally enabled DND, pressing the Call button will turn off DND.
• Panic Call―Double tapping the Call button attempts to initiate a Panic call if a Panic group is configured.

Let me know if this helps or if there is anything else I can clarify.