[Freeswitch-users] ringback - multiple values

[Dmitry Mordovin]

Hello

Is it possible to set multiple values in ringback?

<action application="set" 
data="ringback=file_string:///opt/freeswitch/sounds/en/us/callie/voicemail/8000/vm-goodbye.wav,${us-ring}"/>

I try to use " , ! ; " character for separate - Not works.

My idea is play wav file and then play us-ring while bridge is calling 
to destination

How can do it?