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Liaison statement
IMTC work on SIP feature parity with H.323

Additional information about IETF liaison relationships is available on the IETF webpage and the Internet Architecture Board liaison webpage.
State Posted
Submitted Date 2013-03-27
From Group IMTC
From Contact John Ehrig
To Group sipcore
To Contacts Adam Roach <>
Paul Kyzivat <>
Cc Gonzalo Camarillo <>
Richard Barnes <>
Session Initiation Protocol Core Discussion List <>
Charles Eckel <>
Purpose For information
Attachments IMTC work on SIP feature parity with H.323
Best Practices for SIP Security
The IMTC SIP Parity Activity Group (AG) provides a forum for IMTC member
companies to cooperate and pool resources on SIP Parity issues.

The SIP Parity AG has focused on providing video profiles for SIP that match
all the capabilities of H.323 videoconferencing. The ultimate objective of the
AG is to bring it to full feature parity with H.323 video communications.
Following its members’ inputs, the AG has been working on several documents to
help manufacturers implement standard features in an interoperable manner. The
work products of the group are best practice documents and corresponding test
cases documents. The most recently completed of best practice is in regard to

The IMTC SIP Parity AG would like to make other organizations aware of their
efforts, and coordinate these efforts with any related efforts that may exist
within other organizations. The IMTC SIP Parity AG would like to take this
opportunity to share the existing draft version of the security best practice
document and solicit feedback or comments on this draft before progressing it
through the IMTC official approval procedure.

Please see the attached liaison statement and best practice document for more


John Ehrig

IMTC Secretariat