Awesome, thanks Iñaki! I have long had the need for something more flexible than the check_sip wrapper around 'sipsak' that Nagios provides (I think that's how it works, anyway?). In particularly at issue was the timeout; it needs to be configurable and rather strict, in my case. On 04/12/2010 06:14 PM, Iñaki Baz Castillo wrote: -- Alex Balashov - Principal Evariste Systems LLC 1170 Peachtree Street 12th Floor, Suite 1200 Atlanta, GA 30309 Tel: +1-678-954-0670 Fax: +1-404-961-1892 Web: http://www.evaristesys.com/