Pages are not always heard on every telephone in a group. An extension does not transmit a group page if the extension has an active or a ringing call, or if the extension is off-hook. Listeners can drop a page if the listeners disconnect. Pages cannot be heard when the Send All Calls or Do Not Disturb features are activated.

When a group member does not hear the announcement for any of these reasons, the caller is not notified. Therefore, the originator of an important page might want to check with the group members to ensure that all members heard the page.