have just spent a first few hours of using the "sip express router" so apologies up front for what is definitely a beginners question. the ser software is installed on a freebsd v5.2 host - the ser package was installed using the sysinstall program. to date i have so far not modified the condiguration of the ser server given comment that the default "ser.cfg" file is sufficient to enable local communication. i have modified the dns zone to include the SRV RR as follows; _sip._udp.mydomain.com ...... this is verified from nslookup have reconfigured the "sip communication service connection configuration" advanced settings of windows messenger 5.0 (on windows 2000) with the ip address and fully qualified host name of the SER server and to use udp (not tcp) when attempting signon using an arbitrary id of me(a)mydomain.com WM reports "signing into sip communications service failed ...." the SER host console logs three messages which i summarise as below; "message too long (40)" "udp_send failed" t_forward_nonack: sending request failed I don't know if I have taken the note that the default config will work without modification a bit too literally, but any advices on this will be gladly received GT _______________________________________________ Serusers mailing list serusers(a)lists.iptel.org http://lists.iptel.org/mailman/listinfo/serusers