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Welcome New MEF Members
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IMS Activity Group

The IMS AG focuses on interoperability of end-to-end functionality, terminal-network signaling and media, from the terminals’ point of view. Our work includes finalizations of application specifications, creation of test specification and implementation guides, organization of test events, and more.

This activity has several aspects to it:

  • We perform and document well planned, controlled rigorous interoperability tests.
  • We plan, execute, and track rigorous interoperability tests for the benefit of participating member companies.Provide feedback to 3GPP, 3GPP2, GSMA and other SDO’s so that the lessons learned through testing can be applied to improve the relevant standards.


The IMTC collaborates and has liaison relationships with several standards development organizations.

Learn about the liaison activities this group is maintaining with external organizations.

Collaboration Method

  • Private e-mail reflectors are used to ensure maximum confidentiality
  • Conference calls for milestone update about contribution statuses and create and update TIP documentation.
  • Face-to-face meetings when and if needed.

Participation is limited to IMTC members in good standing and a developer of one of the following; streaming servers, content distribution servers, content creation tools, or multimedia terminals

Why Join

  • Improve your company’s solutions by finding and eliminating interoperability obstacles.
  • Be the first to test new features added to 3GPP, 3GPP2 and GSMA IMS standards with the leaders in the industry.
  • Gain access to experts and insights regarding standards.
  • IMS Activity Group is well established, very driven and has a strong collaborative spirit.
  • Offers numerous test opportunities throughout the year.
How to JoinTo 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

EricssonFrance TelecomNokia CorporationAvayaSamsung Electronics Co., Ltd.