Hi All, i found an article that explains SIP NAT woes. http://www.sipcenter.com/files/SIPNATtraversal.pdf It is a great read for all people in the mailing list that have problems with SIP when * is behind NAT or when there is NAT between asterisk and a SIP phone. Serge _________________________________________________________________ MSN 8 helps eliminate e-mail viruses. Get 2 months FREE*. http://join.msn.com/?page=features/virus