See http://sip2sip.info for TCP proxy >> Hi Florian, yes, that's how I imagined this problem could be solved. Thanks for the clarification. Any hints which SIP service providers can/should be used for this? I don't want to turn this mailing list into an advertising platform ;) but I don't have any experience with such providers. And I don't need most of the common features (e.g. no new account). Just need to register my own existing account at the provider and redirect INVITEs. Thanks! Martin -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20120604/9ece097c/attachment.html>