Hi Marcus,

Have a look at this good feature;

Unity Broadcast Message Manager

Sending a New Broadcast Message

To send a new broadcast message, press the Add new message button on the main form and the Send New Broadcast Message form will display.

This form lets you select a WAV file off the local hard drive or a networked drive available on the local system, select your date ranges or indicate you would like no date restrictions for the message and select the subscriber to be the sender or owner of the broadcast message and press the insert button. Both the WAV file and subscriber are required properties for the message insertion to work properly.

From this link;

http://ciscounitytools.com/HelpFiles/BroadcastMessageManager/BroadcastMessageManager.HTM#_Toc117672270

http://ciscounitytools.com/App_BroadcastMessageManager.htm

Hope this helps!

Rob