Hi,
Just noticed the maximum result for MATH function is '2147483647', and:
exten => _X.,n,Set(PSTN_TIMEOUT=${MATH(9999999999*1,int)})
produces -2147483648 as a result.
The above applies to 32bit Ubuntu OS.
Might be an idea to add a note to this function description to warn
users about this limitation.
Best regards,
Chris