Hi, Olaf! I'll have a look and try on it. Thanks. Best regards, Roa Yu -----Original Message----- From: Olaf Bergmann [mailto:Olaf.Bergmann@freenet-ag.de] Sent: Thursday, June 28, 2007 5:34 PM To: roayu Cc: serusers(a)lists.iptel.org Subject: Re: [Serusers] How SER communicate to other SIP server roayu wrote: Look at the "Hello World ser.cfg" <http://siprouter.onsip.org/doc/gettingstarted/ch06.html>. For unknown SIP domains, route[1] does the DNS-based forwarding mentioned before. You should give it a try and see how it works. HTH, Olaf