Session Initiation Protocol (SIP) Recording Call Flows
RFC 8068
Internet Engineering Task Force (IETF) R. Ravindranath
Request for Comments: 8068 Cisco Systems, Inc.
Category: Informational P. Ravindran
ISSN: 2070-1721 Nokia Networks
P. Kyzivat
Huawei
February 2017
Session Initiation Protocol (SIP) Recording Call Flows
Abstract
Session recording is a critical requirement in many communications
environments, such as call centers and financial trading
organizations. In some of these environments, all calls must be
recorded for regulatory, compliance, and consumer-protection reasons.
The recording of a session is typically performed by sending a copy
of a media stream to a recording device. This document lists call
flows with metadata snapshots sent from a Session Recording Client
(SRC) to a Session Recording Server (SRS).
Status of This Memo
This document is not an Internet Standards Track specification; it is
published for informational purposes.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Not all documents
approved by the IESG are a candidate for any level of Internet
Standard; see Section 2 of RFC 7841.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc8068.
Ravindranath, et al. Informational [Page 1]
RFC 8068 SIP Recording Call Flows February 2017
Copyright Notice
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Table of Contents
1. Overview ........................................................3
2. Terminology .....................................................3
3. Metadata XML Instances ..........................................3
3.1. Sample Call Flow ...........................................3
3.2. Call Scenarios with SRC Recording Streams without Mixing ...5
3.2.1. Example 1: Basic Call ...............................5
3.2.2. Example 2: Hold/Resume ..............................9
3.2.3. Example 3:Call Transfer (RE-INVITE and
REFER Based) .......................................12
3.2.4. Example 4: Call Disconnect .........................19
3.3. Call Scenarios with SRC Recording Streams by Mixing .......20
3.3.1. Example 1: Basic Call with SRC Mixing Streams ......20
3.3.2. Example 2: Hold/Resume with SRC Recording
by Mixing Streams ..................................23
3.3.3. Example 3: Metadata Snapshot of
Joining/Dropping of a ..............................25
3.3.4. Example 4: Call Disconnect .........................28
3.4. Call Scenarios with Persistent RS between SRC and SRS .....28
3.4.1. Example 1: Metadata Snapshot during CS
Disconnect with ....................................29
3.5. Turret-Case: Multiple CS into Single RS with Mixed
Stream ....................................................30
4. Security Considerations ........................................32
5. IANA Considerations ............................................32
6. References .....................................................33
6.1. Normative References ......................................33
6.2. Informative References ....................................33
Acknowledgements ..................................................34
Authors' Addresses ................................................34
Ravindranath, et al. Informational [Page 2]
RFC 8068 SIP Recording Call Flows February 2017
1. Overview
Session recording is a critical requirement in many communications
environments, such as call centers and financial trading
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