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The SIP Forum is an industry association with members from the leading IP communications companies. Its mission: To advance the adoption and interoperability of IP communications products and services based on SIP.
The Forum promotes SIP as the technology of choice for the control of real-time multimedia communication sessions throughout the Internet, corporate networks, and wireless networks.
The Forum directs technical activities aimed at achieving high levels of product interoperability, provides information on the benefits and capabilities of SIP, and highlights successful applications and deployments.
Each of our Working Groups and Task Groups has their own mailing list, many of which are open to individual, "Participant" members. Please feel free to join them, or to join the general "discussion" mailing list.
The SIP Forum is currently engaged in the following technical activities -- each of which has its own Task Group that includes a unique mailing list, chairperson(s) and group of contributors:
The Forum is open to individual "Participant" members, Academic/Institutional Members, and to corporate "Full Members". Individual "Participant" and Academic/Institutional membership is free.
View our current Full (Corporate) Member Listing. View our Academic Member Listing.
Find out about Membership.
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SIP Forum Ratifies the SIPconnect Technical Recommendation Version 2.0!
The SIP Forum reached an important milestone by formally ratifying Version 2.0 of the SIPconnect Technical Recommendation on November 28, 2016, with the unanimous approval of the SIP Forum Board of Directors.
The formal adoption by the SIP Forum Board of the SIPconnect 2.0 Technical Recommendation is based on recognition that the recommendation has been through credible peer review, including broad membership and significant community review, that it is stable and is well-understood, and that it is believed to have resolved known design choices.
The SIPconnect 2.0 Technical Recommendation is a profile of the Session Initiation Protocol (SIP) and related media aspects that enables direct connectivity between a SIP-enabled Service Provider Network and a SIP-enabled Enterprise Network. It specifies the minimal set of IETF and ITU-T standards that must be supported, provides precise guidance in the areas where the standards leave multiple implementation options, and specifies a minimal set of capabilities that should be supported by the Service Provider and Enterprise Networks.
SIPconnect 2.0 effectively extends SIPconnect 1.1. Where SIPconnect 1.0, and 1.1 focused primarily on basic network registration, identity/privacy management, call originations, call terminations, and advanced services, the 2.0 version adds additional guidance on Security, Emergency Calling, and IPv6.
Where appropriate, recommendations from SIPconnect 1.1 have been left unchanged, although some modifications to prior recommendations have been made based on experience and feedback gathered through adoption of SIPconnect 1.1 in the industry.
View the full text of the SIPconnect 2.0 announcement.
To view or download the ratified SIPconnect Technical Recommendation Version 2.0, please click HERE.
For more information about the SIPconnect 2.0 Task Group charter, please visit HERE.
New Specification by ATIS/SIP Forum NNI Task Force Advances Network Capabilities to Mitigate Unwanted Robocalling and Caller ID Fraud
ATIS and the SIP Forum have announced the publication of the SHAKEN (Signature-based Handling of Asserted information using toKENs) specification, a major advancement in industry efforts to mitigate unwanted robocalls and caller ID spoofing.
Developed to efficiently implement the IETF’s STIR (Secure Telephony Identity Revisited) standard, SHAKEN defines a signature to verify the calling number and specifies how it will be transported in SIP “on the wire.” The SHAKEN framework provides guidance for service providers to implement STIR. Together, STIR/SHAKEN will offer a practical mechanism to provide verified information about the calling party as well as the origin of the call — what is known as “attestation” — for the first time in the network. Giving service providers the tools needed to sign and verify calling numbers makes it possible for consumers to know, before answering, that the calls they receive are from legitimate parties.
Read the full text of the SHAKEN announcement.
The ATIS/SIP Forum NNI Task Force previously completed the first standardized IP-based network-to-network interconnection (NNI) with consensus across North American Service providers. This accomplishment enables a major objective identified in the United States National Broadband Plan, to ensure that all service connections between providers occur at the Internet Protocol (IP) level. It also helps the industry advance a major business objective of achieving the interconnection needed to reliably deliver a range of exciting new IP-based services. This work is the product of the ATIS/SIP Forum Joint Task Force, which is at the forefront of conducting an industry effort to evaluate the current state of IP-IP interconnection, identify problem areas, and provide detailed protocol-level specifications to advance solutions.
Those completed documents provide a detailed, protocol-level IP-NNI specification for one service – voice. From this initial profile, further specifications can more easily be developed. The two new ratified documents are (1) IP Interconnection Profile, which describes a reference architecture and specifications for both the protocol and media as it appears “on-the-wire” at interconnect points; and (2) IP Interconnection Routing Report, which documents mechanisms for identifying the preferred IP interconnection point for a given phone number.
Read the full text of the ATIS and SIP Forum IP-NNI Task Force announcement.
For more information about the NNI Task Force and Charter, and to obtain copies of the completed specifications, please visit the NNI Task Force Introduction Page HERE.
SIP Forum’s SIP over IPv6 Task Group Achieves Milestone with the Publication of “Interoperability Impacts of IPv6 Interworking with Existing IPv4 SIP Implementations”
The continued proliferation of IPv6 infrastructure deployments has resulted in more IPv6 Session Initiation Protocol (SIP) User Agents (UAs) being turned up on networks around the world. Considering the large installed base of IPv4 SIP UAs deployed prior to the deployment of IPv6, it is a well-known fact that not all IPv4 SIP UAs have taken into account all possible IPv4 SIP-to-IPv6 SIP interoperability considerations at the time of their development.
The SIP Forum has announced that the SIP over IPv6 Task Group has achieved a significant milestone in its mission to improve the interoperability of IPv6 Interworking with IPv4 implementations with the publication of a new document entitled “Interoperability Impacts of IPv6 Interworking with Existing IPv4 SIP Implementations”.
View the full text of the announcement HERE.
The SIP Forum's SIP over IPv6 Task Group (IPv6) was formed to address key deployment and interoperability issues in the telecommunications industry’s migration to SIP over IPv6. The task group, which includes key stakeholders from the service provider, application developer and equipment communities, has developed and ratified a charter with the mandate to identify issues with SIP over IPv6 and assess the impact of transition technologies and dual stack devices on existing SIP networks.
For more information, please visit the SIP over IPv6 Task Group Charter webpage.
SIPit 32 Has Concluded
SIPit 32 was held at the University of New Hampshire Interoperability Laboratory September 12-16, 2016. A Summary of test results from the event will be available soon.
In addition to the usual thorough testing, SIPit 32 focused on new evolutions in SIP Security such as the mechanisms defined in the STIR working group. The event also conducted tests designed to inform the new SIPBRANDY effort in the IETF.
Read the full SIPit 32 announcement here.
To view the results of past SIPit events, please visit the SIPit section of the SIP Forum website HERE.
SIP Forum Launches SIPconnect Certification Testing Program
We are proud to announce the launch of the SIPconnect Certification Testing Program, a unique certification testing program that includes a new certification test suite and test platform, as well as an associated “SIPconnect Certified” logo program that will serve as the official “seal of certification” for companies products and services that have successfully passed the certification test and officially achieved conformance with the SIPconnect specification.
The result of three years of planning and development, the new SIPconnect Certification Testing Program will be hosted by the UNH-IOL, a well-known independent, third-party laboratory dedicated to broad-based testing and standards conformance services for networking industries. The program will be available to IP communications equipment vendors, including IP-PBX and SBC vendors, and service providers who are offering SIP trunking services.
For more information, please read the full text of the official announcement or visit the SIPconnect Certification Program Overview webpage.
SIP Forum 2016 Annual General Meeting
The SIP Forum 2016 General Meeting was held on Wednesday, 30 November 2016.
In the meeting, a review of the financial operations was conducted, as well as a review of the operational and technical activities that have occurred over the past 12 months since the last General Meeting. In addition, votes were cast for new board members and for one other voting issue.
For more information about the meeting, including the full text of the 2016 Annual General Meeting Notice, please click HERE.
SIPNOC 2016 Concludes -- Presentations Available!
SIPNOC 2016, June 21-23, 2016, was a great success.
The three-day conference, which focused on the challenges and opportunities related to the deployment of SIP-based services in global service provider networks, attracted technical leadership from MSOs and carriers from all over North America, South America and Europe, as well as a host of SIP community stakeholders including equipment and solutions vendors, government agencies, research organizations, and large enterprise network operators.
For more information about the event that just concluded, please visit the SIPNOC 2016 event webpage.
For those interested, the presentations from SIPNOC 2016 are now available for viewing and download.
SIP Forum Reports Results From RTCWeb-it 2 Interoperability Testing Event
RTCWeb-it 2, hosted by TMC, was the second WebRTC interoperability testing event produced by the SIP Forum, and was held in Santa Clara, California, Monday, November 18, 2013. This special event allowed WebRTC implementers above and below the WebRTC API to work together with the specification authors to improve their code and the specifications.
RTCWeb-it 2 brought together the browser developers, and other implementers working on the code that makes the WebRTC API work; Application developers that are using the WebRTC API; Gateway developers, particularly those building systems that bridge WebRTC and SIP; and the editors of several of the specifications being developed.
RTCWeb-it 2 was a very successful test session, as most of the scenarios that were exercised "just worked" the first time. There were two browser implementations, and one application suite at the event. The scenarios tested included a rich combination of NAT and firewall restricted network paths, ensuring that the expected media and data channel path was taken in each scenario. (This included forcing the browsers to communicate only through a Turn server.)
One observation from the tests is that implementations cannot rely on streams being available until onAddStream is called. This may or may not happen before the setRemoteDescription success callback.
We found a few deployed applications that are currently changing their behavior based on the User-Agent string, and have cost themselves starting to automatically work cross-browser as the browsers are being updated. New application developers should isolate such decisions. (It would have been nice to disable these checks to see if cross-browser DataChannels worked with the browser code.)
Having a rich application suite available helped drive effective tests, and provided very useful feedback for the application developer. All application developers should consider attending the next event to get the quick feedback this kind of testing environment provides.
SIP Forum and BITKOM Announce New Partnership in the Ongoing Development of SIPconnect
The SIP Forum announced a new alliance with BITKOM, the Federal Association for Information Technology, Telecommunications and New Media in Germany, in the development of the next update to the SIP Forum’s SIPconnect 1.1 Technical Specification.
The formal endorsement of SIPconnect by BITKOM will provide valuable technical input and peer review by one of the European Union’s most prominent technical associations, and help ensure that the next version of SIPconnect meets the requirements of BITKOM members. As part of the agreement, the two organizations will pool requirements as they work towards an update of their respective SIP trunking specifications.
Read the full text of the SIP Forum and BITKOM Announcement.
SIP Forum’s Fax over IP Task Group Achieves Milestone with the Publication of IETF RFC 6913
The SIP Forum announced its Fax over IP (FoIP) Task Group has achieved a significant milestone in its mission to improve international IP fax transport services with the publication of RFC 6913 – a new Internet Engineering Task Force (IETF) RFC that introduces a new “sip.fax” media feature tag that aims to enable the intelligent routing of International faxes and greatly improve the reliability of International faxing services.
RFC 6913, co-authored by David Hanes, Kevin Fleming and Gonzalo Salgueiro, defines and registers with IANA a new "fax" media feature tag for use with the Session Initiation Protocol (SIP). Currently, fax calls are indistinguishable from voice calls at call initiation. Consequently, fax calls can be routed to SIP user agents that are not fax capable. A "fax" media feature tag implemented in conjunction with caller preferences allows for early advertisement of fax capabilities and consequently, more intelligent fax call routing.
Click here to see the full text of the RFC 6913 announcement.
As part of the work leading up to this new RFC, the Fax-over-IP Interoperability Task Group published a T.38 SIP-SDP subgroup Problem Statement that details a number of SDP offer/answer interoperability issues found while implementing and connecting T.38 compliant endpoints together, primarily over the SIP signaling mechanism. Click HERE to view or download this document.
In addition, the Forum previously published an official task group problem statement, a document that details the various interoperability issues that currently plague FoIP services. This document is available for download HERE.
The FoIP Task Group has developed a task group charter, which you can view HERE.
To view task group documents and other related materials, please visit the FoIP Task Group document repository HERE.
SIP Forum UA Configuration Recommendation Ratified and Published as RFC 6011 by the IETF
The SIP Forum has announced that its User Agent Configuration Recommendation for the locating, retrieving and maintaining of SIP User Agents has been ratified and published as RFC 6011 by the Internet Engineering Task Force (IETF).
The publishing of the recommendation as RFC 6011 marks a significant milestone for the SIP Forum, the leading IP communications industry association, and its UA Configuration Task Group, led by Chairman John Elwell, the Head of Standardization Strategy at Siemens Enterprise Communications GmbH. The UA Configuration Task Group has been working on the procedure since 2009, and has designed the standard in a manner that addresses the needs of end users and services providers, as well as both small businesses and large enterprises deploying SIP-enabled endpoints.
Now published as RFC 6011 by the IETF’s Internet Engineering Steering Group (IESG) after a public review process by the IETF community, the User Agent Configuration Recommendation (UA Config) sets a standard procedure for how a SIP User Agent locates, retrieves and maintains current configuration information for a given SIP Service Provider. It requires that each User Agent, the configuration agent at the service provider and network infrastructure meet such requirements to ensure communication.
To view the full text of the announcement, please click HERE.
To view the published text of RFC 6011, please visit http://tools.ietf.org/search/rfc6011.
- SIP Forum’s SIPit 32 Slated for September 12–16, 2016 in Durham, New Hampshire
- SIP Forum Opens Call for Presentations and Early-Bird Registration for SIPNOC 2016
- ATIS and SIP Forum Complete New IP-Based Network to Network Interface (NNI) Technical Specification
- SIP Forum Opens Call for Presentations and Early-Bird Registration for SIPNOC 2015
- ATIS/SIP Forum IP Network-to-Network (NNI) Joint Task Force Publishes Draft Documents for Comment
- SIP Forum Releases Results from SIPit 31 in Nice, France
- ATIS and SIP Forum Launch Joint Task Force on IP-NNI
- SIP Forum Opens Call for Presentations and Early-Bird Registration for SIPNOC 2014, June 9 – 12, 2014
- SIP Forum and BITKOM to Partner in the Ongoing Development of the SIPconnect SIP Trunking Specification
- SIP Forum’s Fax over IP Task Group Achieves Milestone with the Publication of IETF RFC 6913
- Global Carriers, Cable Operators, and ITSPs Headline Attending Companies at SIPNOC 2013
- XO Communications CTO and SVP of Engineering Randy Nicklas to Keynote at SIPNOC 2013
- SIP Forum Announces FCC Chief Technology Officer Henning Schulzrinne to Reprise Role as Keynote Speaker at SIPNOC 2013
- WebRTC, SIP Trunking, Emergency Services, Security and SIP-IPv6 Deployment Challenges Headline Agenda at SIPNOC 2013
- SIP Forum Extends Call for Presentations for SIPNOC 2013 to February 28, 2013
- SIP Forum’s SIPit 30 Slated for February 18–22, 2013 in Raleigh-Durham, NC
- SIP Forum Opens Call for Presentations for SIPNOC 2013
- SIP Forum Announces Dates and Opens Registration for Third Annual SIPNOC
- SIP Forum Announces New SIP over IPv6 Task Group
- SIP Forum Announces New SIPconnect-IT 2012 SIP Trunking Interoperability Testing Event Dec. 3, 2012
- Global Service Providers Headline Attending Companies at SIP Forum’s SIPNOC US 2012
- SIP Trunking Interoperability, Security and SIP-IPv6 Deployment Challenges Headline Agenda at SIPNOC US 2012
- SIP Forum Names Spencer Dawkins Technical Director
- Worldwide Service Provider Technical Community to Converge at SIPNOC US 2012
- FCC Chief Technology Officer Henning Schulzrinne Keynote Speaker for SIPNOC US 2012
- SIP Forum Names Vijey Jenkal of Comcast to Board of Directors, Re-Elects Chairman Richard Shockey and Director Alan Johnston to New Terms
- The SIP Forum Opens Call for Presentations for SIPNOC US 2012
- SIP Forum Announces New SIP Trunking Interoperability Testing Initiative
- Registration Now Open for the SIP Forum’s SIPNOC US 2012 Conference
- SIP Forum Announces Dates for the Second Annual SIPNOC -- SIP Network Operators Conference
- SIP Forum’s SIPit 29 Slated for October 24–28, 2011 in Monte Carlo, Monaco
- SIP Forum to Have Strong Presence at ITEXPO in Austin, TX
- SIP Forum Releases Results from SIPit 28 in Huntsville, Alabama
- SIP Forum Announces Ratification of Version 1.1 of the SIPconnect Technical Recommendation
- SIP Forum Announces Detailed Conference Agenda for SIPNOC 2011
- Inaugural SIPNOC Attracts Global Service Provider Decision Makers
- SIP Forum Opens Call for Presentations for Inaugural SIPNOC Event
- SIP Forum Announces FCC Chief Technologist Dr. Douglas C. Sicker Keynote Speaker for Inaugural SIPNOC Event
- SIP Forum Launches SIPNOC -- SIP Network Operators Conference -- for the Worldwide Service Provider Community
- SIP Forum UA Configuration Recommendation Ratified and Published as RFC 6011 by the IETF
- SIP Forum Welcomes Georgetown University as New Academic Member
- SIP Forum and i3 Forum Launch Groundbreaking International Test Program for Fax over Internet Protocol
- SIPit 27 to be Held in Taipei, Taiwan -- Registration is Now Open!
- SIP Forum Releases Results from SIPit 26 in Kista, Sweden
- SIP Forum and the i3 Forum Partner to Promote Interoperability of SIP-based Carrier Services
- IPv6 Forum Joins SIPit 26 as Association Sponsor
- SIP Forum and the IPv6 Forum Forge Global Partnership
- SIP Forum Announces that SIPit 26 Registration is Now Open!
- SIP Forum Welcomes Juniper Networks as a New Full Member!
- SIP Forum Welcomes GRADIANT as New Academic-Institutional Member
- SIP Forum Has Strong Presence at ITEXPO in Miami
- SIP Forum Elects New Chairman of the Board of Directors and Board Members; Retains Managing Director
- SIP Forum's Smart Grid SIG: What It Means for Utilities
- New Video Interview on SIP Forum's FoIP Initiative
- SIP Forum Forms New Smart Grid Special Interest Group
- Video Interview with SIP Forum Director and "SIPit Master" Robert Sparks
- SIP Forum Welcomes Tele2 Nederland as a New Full Member!
- SIP Forum UA-Config Task Group Presents at SIPit 25
- SIP Forum Welcomes Bell Canada as a New Full Member
- SIPit 25 Results Now Available
- Eric Burger, SIP Forum Chairman, To Present At U.S Capital Visitor's Center
- Smart Grid Portal Features Q&A with Marc Robins, SIP Forum Managing Director
- SIP Forum User Agent Configuration (UA-Config) Task Group Updates at IETF 75
- SIP Forum FoIP Task Group Publishes Official Fax-over-IP Problem Statement
- SIPconnect Compliance Workshop Redux!
- SIP Forum Welcomes Texas A&M University as New Academic Member
- SIP Forum Opens SIPit 25 Registration
- SIPit 24 Results Now Available
- SIP Forum Welcomes University of Glamorgan as New Academic Member
- SIP Forum Welcomes Comcast Cable as a New Full Member
- SIP Forum Welcomes Genband as a New Full Member
- Eric Burger, SIP Forum Chairman, to Present at eComm2009
- SIP Forum Welcomes Columbia University as New Academic Member
- SIP Forum Welcomes 8x8 as a New Full Member
- SIP Forum Welcomes Cablevision Lightpath as a New Full Member
- SIP Forum Welcomes Two New Academic Members
- New Column by SIP Forum Director Chris Gatch entitled "Virtualization Tsunami
- SIP Forum Chairman Eric Burger Authors New Book
- Nortel rejoins SIP Forum as Full Member Company
- SIP Forum Welcomes XO Communications as a New Full Member
- New Video Interview with SIP Forum Chairman Eric Burger at IETF 73
- New FierceVoIP.com SIP Forum Column Debuts
- New Column by SIP Forum Director Chris Gatch on SIPconnect 1.1
- Mitel rejoins SIP Forum as Full Member Company
- SIP Forum 2008 General Meeting Results are In!
- SIP Forum Welcomes Cedar Point Communications as a New Full Member
- Strategic Path Features Interview with Managing Director Marc Robins
- SIP Forum Welcomes Samsung as a New Full Member
- SIP Forum Announces 2008 Annual General Meeting
- August 2008 SIP Forum Member Newsletter Now Available
- SIP Forum Welcomes ShoreTel as a New Full Member
- Nojitter.com Feature by SIP Forum Managing Director Marc Robins on SIPconnect
- Cox Communications is First Cable Operator to Join SIP Forum
- Column by SIP Forum Director Chris Gatch on Why Mobile SIP Will Surpass IMS
- SIP Forum Experiences Dramatic Surge in Membership
- IPconvergenceTV.com Video Interview with SIP Forum Chairman and Managing Director
- Telephony Online Podcast Features Marc Robins, SIP Forum Managing Director
- Column by SIP Forum Director Chris Gatch on SIP Trunking Growth in 2008
- SIP Forum Ratifies Version 1.0 of the SIPconnect Technical Recommendation
- SIP Forum Elects New Chairman and Appoints Managing Director, Adds Industry Veterans
- Avaya Solutions Attain SIPconnect Compliant Certification
- SIPit 21 Results: Another Successful Event
- SIP Forum Hosts SIP Interoperability Workshop at IETF 70
- SIP Forum 2007 Annual General Meeting Results
- SIPconnect Compliance Program Launched
- SIP Forum, UNH Lab Join Forces for SIP Interoperability