asterisk users - May 2008 - dialplan syntax error: need new eyes

I'm trying to set the outgoing caller id to the DID number, but only if 
the extension is greater than 140. MAINSTUB is simply the first 7 digits 
of the main number. sip.conf sets the CALLERID(num) to the extension.

exten =>_1NXXNXXXXXX,n,Set(CALLERID(num)=${MAINSTUB}${CALLERID(num)})

works. But I want to set the caller id to the main number unless the 
extension is 141 or higher.

This doesn't work:

exten =>_1NXXNXXXXXX,n,Set( CALLERID(num) = ${IF ( $[${CALLERID(num)} > 
140] ? ${MAINSTUB}${CALLERID(num)} : ${MAINNUMBER} )})

ast_yyerror():  syntax error: syntax error, unexpected '>', expecting
$end; Input:
  > 140

I've counted my parens, checked IF syntax, and now need some new eyes to 
look at this.

Thanks.

sean

On Fri, May 23, 2008 at 05:08:28PM -0400, sean darcy
wrote:
> 
> This doesn't work:
> 
> exten =>_1NXXNXXXXXX,n,Set( CALLERID(num) = ${IF ( $[${CALLERID(num)}
>
> 140] ? ${MAINSTUB}${CALLERID(num)} : ${MAINNUMBER} )})
Change "IF (" to "IF(".