Hi, I have installed SER on linux and created a few users. I can register these users from SIP phones and soft-phones and can also establish connections between them. I have also created a user on the iptel.org server. I can ring from a client registered with my domain (cs.stir.ac.uk) the client registered with iptel.org. It works perfectly. However, ringing from the client registered with iptel.org a client registered locally doesn't work. Is this a config problem? How can I fix this? Any help is greatly appreciated! Best regards, Mario Kolberg -- Mario Kolberg phone: +44 (0)1786 46 7440 Lecturer in Computing Science fax : +44 (0)1786 46 4551 email: mko(a)cs.stir.ac.uk Department of Computing Science and Mathematics University of Stirling Stirling FK9 4LA Scotland, UK -- The University of Stirling is a university established in Scotland by charter at Stirling, FK9 4LA. Privileged/Confidential Information may be contained in this message. If you are not the addressee indicated in this message (or responsible for delivery of the message to such person), you may not disclose, copy or deliver this message to anyone and any action taken or omitted to be taken in reliance on it, is prohibited and may be unlawful. In such case, you should destroy this message and kindly notify the sender by reply email. Please advise immediately if you or your employer do not consent to Internet email for messages of this kind. Opinions, conclusions and other information in this message that do not relate to the official business of the University of Stirling shall be understood as neither given nor endorsed by it.