[foo]
exten => 123,1,Answer
exten => 123,n,Background(vm-extension)
exten => 123,n,Read(EXT)
exten => 123,n,Figure out What That Ext is connected to (ZAP1, SIP3, etc)
exten => 123,n,ChannelRedirect(SIP/${EXT},900,1)
exten => 123,n,ChannelRedirect(SIP/${Whoevertheyweretalkingto},900,1)
exten => 123,n,Goto(901,1)
exten => 900,1,Meetme(900)
exten => 900,1,Meetme(900,mutedoption)