Welcome to ftp.iptel.org ftp.iptel.org is a public FTP server dedicated to freely available SIP (Session Initiation Protocol, RFC3261) based software. Here you can find everything that you will need to implement robust and highly scalable SIP based server systems. Among others, this archive contains freely available: * implementation of SIP proxy server (SER) * RTP proxy server for NAT traversal (RTPProxy) * Web based administration interface (SERWeb) * SIMPLE based instant messaging and presence server with support for XCAP * voicemail and announcement server (SEMS) We also keep a local copy of IETF (Internet Engineering Task Force) RFCs (Request For Comments) and Internet drafts. Visit our website http://iptel.org for more information about SIP, the software in this archive, or VoIP in general. Should you have any problems, requests, or suggestions for improvements, do not hesitate to contact us by e-mail at