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Concluded WG SIP Recording (siprec)

Note: The data for concluded WGs is occasionally incorrect.

WG Name SIP Recording
Acronym siprec
Area Applications and Real-Time Area (art)
State Concluded
Charter charter-ietf-siprec-02 Approved
Document dependencies
Additional resources Issue tracker, Wiki
Personnel Chairs Andrew Hutton, Brian Rosen
Area Director Alissa Cooper
Mailing list Address
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Final Charter for Working Group

The Session Recording Protocol (SIPREC) working group is chartered to
define a SIP-based protocol for controlling a session (media) recorder.

Session recording is a critical requirement in many business
communications environments such as call centers and financial trading
floors. In some of these environments, all calls must be recorded for
regulatory and compliance reasons. In others, calls may be recorded for
quality control, business analytics, or consumer protection. Recording
is typically done by sending a copy of the media to the recording
devices. The working group will determine requirements and produce a
specification for a protocol that will manage delivery of media
(including audio, video, MSRP instant message sessions, and real-time
text), in SIP-based systems from an end-point that originates media, or
that has access to it, to a recording device. PBX and recording vendors
today implement proprietary, incompatible mechanisms to facilitate
recording. A standard protocol will reduce the complexity and cost of
providing such recording services.

The Session Recording problem presents certain unique requirements that
are not addressed in the current SIP protocol specification. These
include requirements such as the need for a distinction between the
session that is being recorded versus the session that has been
established for recording.

Privacy and security of conversations are significant concerns. The
working group will make sure that any protocol specified addresses these
concerns and includes mechanisms to alert users to the fact that a
session they are participating in is being recorded. In addition the
working group will take account of RFC 7258 concerning pervasive

The working group must take care that the session recording requirements
and protocol does not conflict with the IETF statement on wiretapping
contained in RFC 2804.

The SIPREC Working Group will thoroughly identify use cases, provide
example system architectures and deployment scenarios, and define

The scope of the activity includes:

  • Recorder Control

  • Session metadata content and format

  • Security mechanisms, including transport and media encryption

  • Privacy concerns, including end-user notification

  • Negotiation of recording media streams

The group will define these issues and rationalize with IETF standards
and practices. This includes encryption, NAT traversal, operations and
manageability, SIP-enabled firewalls, authorization, and security.

The group will produce:

  • Updated Requirements, Use Cases, Architecture draft

  • Specification for Session Recording Protocol


Date Milestone Associated documents
Feb 2015 Protocol and metadata for using RTP media to record the sharing of applications, documents and screens to the IESG as Proposed Standard RFC
Dec 2014 Conference Recording Use Cases and Requirements to IESG as Informational RFC
Dec 2014 Protocol and metadata for MSRP recording to IESG as Proposed Standard RFC
Dec 2014 Conference Recording Architecture to IESG as Informational RFC
Sep 2014 Submit SIPREC Call Flows draft to IESG as an informational RFC.
Sep 2014 Submit Metadata model and format to IESG as Proposed Standard RFC
Jul 2014 Submit protocol draft to IESG as Proposed Standard RFC

Done milestones

Date Milestone Associated documents
Done Submit Architecture to IESG as Informational RFC
Done Use Cases and Requirements to IESG as Informational RFC