Hello, Daniel-Constantin! >I could spot you change the URI in To header and don't restore it for >replies. Might be that if your cisco is old and does not match on >rfc3261. Seems you are right. I test it tomorrow. Thank you! -- WBR, Victor JID: coyote at bks.tv JID: coyote at bryansktel.ru I use FREE operation system: 3.9.4-calculate GNU/Linux