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SIP Interconnect AG

SIP Interconnect Activity Group

The IMTC SIP Interconnect Activity Group provides a forum for IMTC member companies to cooperate and pool resources on issues and extensions to SIP based enterprise communication applications. With its best practices documents providing a shared foundation, the group identifies and tackles challenges and opportunities with interoperability, operation, and integration of SIP based applications with emerging communication and networking technologies.

What We Do

The main activities of the group are to:

  1. Organize interoperability test efforts (both virtual and face-to-face). This are done in cooperation and coordination with WebRTC, MANE, SSV, and UC SDN activity groups and with SIPit
  2. Provide a forum for members to agree on an overall SIP profile for communication applications, particularly where it involves interconnecting with other application and network technologies (e.g. WebRTC, SDN, IPv6)
  3. Educate members on recent developments in SIP standards and market evolution


The IMTC collaborates and has liaison relationships with several standards development organizations – ECMA, IETF (ART area and SIPCORE working group), ITU (SG 16), and SIP Forum. Learn about the liaison activities this group is maintaining with external organizations.

How to Join

To subscribe to the Activity Group’s email list, scroll to the top of the page and click on the “Member Login” button to access the member portal, then select “Join a Work Group”, select the Activity Group and click on the “subscribe” link. You will receive a subscription confirmation in your email. If you have forgotten your password, click on the “Forgot/Need Password” on the sign in screen and it will be emailed to you. If you have not set up a user name and password or have any questions, contact the IMTC help desk at This email address is being protected from spambots. You need JavaScript enabled to view it." style="color: #37296d;">This email address is being protected from spambots. You need JavaScript enabled to view it..

Member Companies
Acano, Avaya, Bluejeans, Cisco, Huawei, Intel, Lifesize, Pexip, Polycom, Sonus, Sorenson, Spirent, Vidyo.

Technical SubGroups

  • SIP Video Profile – Bandwidth, Flow Control, and I-Frame Request
  • Role Base Video – Content sharing via BFCP over UDP
  • SIP Security and Encryption – TLS and SRTP