New syntax of IF has a problem with quotation mark

Hello,

I used in revision 4571 the following line:

exten => s,n,Set(CALLERID(all)=${IF($["${CALLERID(num)}"=""]?${ARG2}:${CALLERID(all)})})

Now I change to new syntax, because IF is DEPRECATED:

exten => s,n,Set(CALLERID(all)=$[$["${CALLERID(num)}"=""]?"${ARG2}"::"${CALLERID(all)}"])

Now I have problems, because there are quotation marks in callerid.

${CALLERID(all)}="Testphone" <1010>

Kind Regards

Fabian