<param name="announce-sound" value="/var/lib/freeswitch/recordings/dp/on_hold_msg.wav"/>
                <param name="announce-frequency" value="30"/>
    <action application="set" data="cc_exit_keys=1"/>

This works great, 

the problem if an agent picks up the phone while the  announce-sound  is palying the system will connect the call however the caller will still hear the announce sound and will only connect to agent when the sound is done  
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