Welcome to iptel.org, the IP Telecommunications Portal

iptel.org is the home of the open-source projects:

iptel.org provides high-value information and resources on
SIP-based IP telephony and IP telecommunication.

iptel.org is the home of the free SIP/IP Telephony service iptel.org.. .

Nov 28 2011: There will be short outage of iptel.org SIP service on Nov 29th morning, and outage of other iptel.org services during Nov 29th.

April 24th: A new book on SIP security has been published by Wiley. Visit sipsecurity.org site for more details.

Apr 17th: We are happy to announce the SIP Router project, a joint effort to create a shared code base for various SER related projects.