Problem

When sending a conference bridge notification in Everbridge Suite, contacts are showing the following delivery result:

The number is unavailable

Root Cause

This delivery result occurs when the notification setting for "Interval between delivery methods" is set to 0min(s), and the contact is contacted by both text and voice paths. This is due to the contact's device receiving a phone call and a text message at exactly the same time, as the device will not be able to handle both paths being received at the same time.

Solution

By increasing the interval between delivery methods to at least one minute, the phone will have sufficient time between paths being delivered.

This ensures that the phone call and SMS are delivered sequentially, minimizing the risk of missing the call.

Furthermore, this adjustment allows the device to manage each communication method independently, ensuring that both the text message and phone call are received and processed correctly by the recipent's device.