Hi, I have a * server which does only SIP to H323 completely in IP domain, there is no digium h/w in it. In your experience, for this type of application, is it required to have a timing source to prevent the calls being dropped. Cheers SW -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20041108/28f20af3/attachment.htm