SIST-TS ETSI/TS 101 909-19-1 V1.1.1:2005

Digital Broadband Cable Access to the Public Telecommunications Network; IP Multimedia Time Critical Services; Part 19: IPCablecom Audio Server Protocol Specification; Sub-part 1: H.248 option

To specify a H.248 description as a variant of TS 101 909-19.

Digitalni širokopasovni kabelski dostop do javnih telekomunikacijskih omrežij – Večpredstavnostne časovno kritične storitve IP – 19. del: Specifikacija protokola avdio strežnika IPCablecom – 1. poddel: Izbira H.248

General Information

• Status: Published
• Publication Date: 31-Dec-2004
• ICS: 33.040.35 - Telephone networks
• Technical Committee: SPN - Services and Protocols for Networks
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Jan-2005
• Due Date: 01-Jan-2005
• Completion Date: 01-Jan-2005
• Ref Project: ETSI TS 101 909-19-1 V1.1.1 (2002-03) - Digital Broadband Cable Access to the Public Telecommunications Network; IP Multimedia Time Critical Services; Part 19: IPCablecom Audio Server Protocol Specification; Sub-part 1: H.248 option

Standards Content (Sample)

SLOVENSKI STANDARD
SIST-TS ETSI/TS 101 909-19-1 V1.1.1:2005
01-januar-2005
'LJLWDOQLãLURNRSDVRYQLNDEHOVNLGRVWRSGRMDYQLKWHOHNRPXQLNDFLMVNLKRPUHåLM±
9HþSUHGVWDYQRVWQHþDVRYQRNULWLþQHVWRULWYH,3±GHO6SHFLILNDFLMDSURWRNROD
DYGLRVWUHåQLND,3&DEOHFRP±SRGGHO,]ELUD+
Digital Broadband Cable Access to the Public Telecommunications Network; IP
Multimedia Time Critical Services; Part 19: IPCablecom Audio Server Protocol
Specification; Sub-part 1: H.248 option
Ta slovenski standard je istoveten z: TS 101 909-19-1 Version 1.1.1
ICS:
33.040.35 Telefonska omrežja Telephone networks
SIST-TS ETSI/TS 101 909-19-1 en
V1.1.1:2005
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST-TS ETSI/TS 101 909-19-1 V1.1.1:2005

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SIST-TS ETSI/TS 101 909-19-1 V1.1.1:2005

ETSI TS 101 909-19-1 V1.1.1 (2002-03)
Technical Specification


Digital Broadband Cable Access to the
Public Telecommunications Network;
IP Multimedia Time Critical Services;
Part 19: IPCablecom Audio Server Protocol Specification;
Sub-part 1: H.248 option

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SIST-TS ETSI/TS 101 909-19-1 V1.1.1:2005
 2 ETSI TS 101 909-19-1 V1.1.1 (2002-03)



Reference
DTS/SPAN-120090
Keywords
access, broadband, cable, gateway, H.248, IP,
MEGACO, multimedia, PSTN
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SIST-TS ETSI/TS 101 909-19-1 V1.1.1:2005
 3 ETSI TS 101 909-19-1 V1.1.1 (2002-03)
Contents
Intellectual Property Rights.5
Foreword.5
Introduction .5
1 Scope.6
2 References.6
3 Definitions and abbreviations.7
3.1 Definitions.7
3.2 Abbreviations.7
4 Technical overview.8
4.1 Architectural requirements.8
4.1.1 Call destination.9
4.1.2 Media formats.9
4.1.3 Security.9
4.1.4 Operational Support Systems.9
4.2 Announcement definitions.9
4.2.1 Tones.10
4.2.2 Fixed-content Announcements.10
4.2.3 Variable Content Announcements.10
4.2.4 Interactive Announcements.10
4.3 Architectural components.10
4.3.1 Audio Server (AS) .10
4.3.1.1 Media Player Controller (MPC).10
4.3.1.2 Media Player (MP).10
4.3.2 Multimedia Terminal Adapter (MTA).11
4.3.3 Media Gateway (MG).11
4.3.4 Media Gateway Controller (MGC).11
4.3.5 Call Management Server (CMS) .11
4.4 IPCablecom Audio Server Interface descriptions.11
4.4.1 Ann-1 Interface - CMS/MTA and MGC/MG Announcement package.11
4.4.1.1 CMS/MTA Interface.11
4.4.1.2 MGC/MG Interface.11
4.4.2 Ann-2 interface - MPC/MP Announcement package .12
4.4.3 Ann-3 interface - CMS/MPC and CMS/MGC.12
4.4.4 Ann-4 interface - MP/MTA .12
4.4.5 Audio Server Physical vs. Logical configuration .12
4.5 Interface Specifications.13
5 Ann-1 interface: CMS-MTA and MGC-MG .14
5.1 CMS-MTA Interface.14
5.1.1 Announcement list.15
5.2 MGC-MG Interface.15
6 Ann-2 interface: MPC-MP .15
6.1 Support of packages .16
6.1.1 Mandatory packages.16
6.1.2 Optional packages.16
6.2 Compatibility rules.16
6.3 Naming conventions.16
6.4 Topology descriptor.16
6.5 Transaction timers.17
6.6 Transport.17
6.7 Service change procedures .17
6.8 Security.17
6.9 Encoding.17
ETSI

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6.10 Use of SDP .17
6.10.1 Protocol version (v=) .17
6.10.2 Origin (o=).17
6.10.3 Session name (s=) .18
6.10.4 Session and media information (i=).18
6.10.5 URI (u=).18
6.10.6 E-mail address and phone number (e=, p=) .19
6.10.7 Connection data (c=).19
6.10.8 Bandwidth (b=).19
6.10.9 Time, repeat times and time zones (t=, r=, z=) .20
6.10.10 Encryption keys.20
6.10.11 Attributes (a=).20
6.10.12 Media Announcements (m=) .22
6.11 Timestamps.22
6.12 Digits Maps.22
Annex A (informative): Bibliography.23
History .24

ETSI

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Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://webapp.etsi.org/IPR/home.asp).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This Technical Specification (TS) has been produced by ETSI Technical Committee Services and Protocols for
Advanced Networks (SPAN).
The present document is part 19, sub-part 1 of a multi-part deliverable covering Digital Broadband Cable Access to the
Public Telecommunications Network; IP Multimedia Time Critical Services. Full details of the entire series can be
found in part 1 (TS 101 909-1 [10]).
Introduction
The present document describes the architecture and specifies a set of signalling interfaces that may be used for playing
announcements in voice-over-IP (VoIP) IPCablecom networks. It defines one of these interfaces: the MPC-MP
interface.
The ideal objective for this interface would be to have a standard based on a single technical solution. However,
commercial implementations of the Audio Server application based on a potential candidate for such a solution, ITU-T
Recommendation H.248 [3], cannot yet be validated against the Audio Server requirements.
The present document defines a solution based on H.248. The solution based on ITU-T Recommendation J.162 (see
Bibliography) is defined in TS 101 909-19-2 [4].
ETSI

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1 Scope
The present document describes the architecture and protocols that are required for playing announcements in
Voice-over IP (VoIP) IPCablecom networks, where the IVR (Interactive Voice Response) system is embedded in the
IPCablecom network. Announcements are typically needed for calls that do not complete. Additionally, they may be
used to provide enhanced information services to the caller. Different carrier service feature sets require different
announcement sets and announcement formats.
Announcements can be as basic as fixed-content announcements (e.g. all circuits busy) or as complex as those provided
by intelligent IVR (Interactive Voice Response) systems. The IPCablecom service model requires that all
announcements be provisioned and signalled in a standard manner for all supported call features and use case scenarios.
The present document identifies a set of signalling interfaces that are used to provide announcement services within a
cable network, and specifies one of these interfaces: the MP-MPC interface, based on the protocol defined in ITU-T
Recommendation H.248 [3].
2 References
The following documents contain provisions which, through reference in this text, constitute provisions of the present
document.
• References are either specific (identified by date of publication and/or edition number or version number) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• For a non-specific reference, the latest version applies.
[1] ETSI TS 101 909-2: "Access and Terminals (AT); Digital Broadband Cable Access to the Public
Telecommunications Network; IP Multimedia Time Critical Services; Part 2: Architectural
framework for the delivery of time critical services over cable Television networks using cable
modems".
[2] ETSI TS 101 909-13: "Access and Terminals (AT); Digital Broadband Cable Access to the Public
Telecommunications Network; IP Multimedia Time Critical Services; Part 13: Trunking Gateway
Control Protocol".
[3] ITU-T Recommendation H.248 (2000): "Audiovisual and multimedia systems - Gateway control
protocol".
[4] ETSI TS 101 909-19-2: "Digital Broadband Cable Access to the Public Telecommunications
Network; IP Multimedia Time Critical Services; Part 19: IPCablecom Audio Server Protocol
Specification; Sub-part 2: MGCP option".
[5] Void.
[6] ETSI TS 101 909-3: "Access and Terminals (AT); Digital Broadband Cable Access to the Public
Telecommunications Network; IP Multimedia Time Critical Services; Part 3: Audio Codec
Requirements for the Provision of Bi-Directional Audio Service over Cable Television Networks
using Cable Modems".
[7] ETSI TS 101 909-11: "Access and Terminals (AT); Digital Broadband Cable Access to the Public
Telecommunications Network; IP Multimedia Time Critical Services; Part 11: Security".
[8] ETSI TS 101 909-10: "Access and Terminals (AT); Digital Broadband Cable Access to the Public
Telecommunications Network; IP Multimedia Time Critical Services; Part 10: Event Message
Requirements for the Provision of Real Time Services over Cable Television Networks using
Cable Modems".
[9] ETSI ETR 187: "Human Factors (HF); Recommendation of characteristics of telephone services
tones when locally generated in telephony terminals".
ETSI

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[10] ETSI TS 101 909-1: "Digital Broadband Cable Access to the Public Telecommunications
Network; IP Multimedia Time Critical Services; Part 1: General".
[11] ITU-T Recommendation J.112: "Transmission systems for interactive cable television services".
[12] IETF RFC 2045: "Multipurpose Internet Mail Extensions (MIME) Part One: Format of Internet
Message Bodies".
[13] ITU-T Recommendation E.182: "Application of tones and recorded announcements in telephone
services".
[14] ITU-T Recommendation G.728: "Coding of speech at 16 kbit/s using low-delay code excited
linear prediction".
[15] IETF RFC 2327: "SDP: Session Description Protocol".
[16] IETF RFC 1889: "RTP: A Transport Protocol for Real-Time Applications".
[17] IETF RFC 1890: "RTP Profile for Audio and Video Conferences with Minimal Control".
[18] IETF RFC 2543: "SIP: Session Initiation Protocol".
[19] IETF RFC 2234: "Augmented BNF for Syntax Specifications: ABNF".
[20] IETF RFC 2401: "Security Architecture for the Internet Protocol".
[21] IETF RFC 2409: "The Internet Key Exchange (IKE)".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
announcement: announcement to be played and which consists of one or more audio segments
cable modem: cable modem is a layer two termination device that terminates the customer end of the J.112 connection
(ITU-T Recommendation J.112)
digit map: one or more digit patterns to be collected
EuroPacketCable: ETSI working group project that includes an architecture and a series of Specifications that enable
the delivery of real time services (such as telephony) over the cable television networks using cable modems
IPCablecom: ETSI working group project that includes an architecture and a series of Specifications that enable the
delivery of real time services (such as telephony) over the cable television networks using cable modems
off-net(work): voice call or data transmission session in which either the originating or terminating device is connected
to an IPCablecom network which is interconnected to another network which is supporting the second terminal
on-net(work): voice call or data transmission session in which the originating and terminating devices are connected to
a single IPCablecom network which may consist of one or more zones or domains
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ABNF Augmented Backus-Naurr Form
AS Audio Server
CMS Call Management Server
DNS Domain Name Server
DTMF Dual Tone Multi-Frequency
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IKE Internet Key Exchange
IPSEC Internet Protocol Security
IVR Interactive Voice Response system
MG Media Gateway
MGC Media Gateway Controller
MP Media Player
MPC Media Player Controller
MTA Media Terminal Adapter
NCS Network-based Call Signalling
PSTN Public Switched Telephone Network
RTP Real Time Protocol
RTCP RTP Control Protocol
SDP Session Description Protocol
SPI Security Parameter Index
TGCP Trunking Gateway Control protocol
VoIP Voice over IP
4 Technical overview
The IPCablecom Audio Server Specification identifies a suite of signalling protocols for providing announcement and
media services in an IPCablecom network. This clause:
• defines the architectural requirements for providing IPCablecom announcement and media services,
• defines and categorizes announcement and media types,
• defines the components and their roles in the IPCablecom Audio Server Architecture, and
• describes the signalling and media interfaces in the IPCablecom Audio Server Specification.
4.1 Architectural requirements
The architectural requirements and assumptions for providing Audio and Media Services for an IPCablecom Network
are listed below. These requirements are based upon the specifications and technical reports that define the IPCablecom
architecture.
The reference architecture for the IPCablecom Network (TS 101 909-2 [1]) is shown in Figure 1 below.
ETSI

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PacketCable Network
Embedded MTA
Call Management
Server
Cable
MTA
Modem
HFC access
AN
network
Announcement
Standalone
Server
MTA
Cable
MTA
Modem
Media Gateway
Managed IP Backbone
PSTN
PSTN Gateway
(QoS Features)
Controller
(Headend, Local, Regional)
Embedded MTA
Signaling
Cable
MTA
Gateway
Modem
HFC access
AN
network
Standalone
Billing
OSS
MTA
Provisioning
Backoffice
Problem Resolution
Cable
DHCP Servers
MTA
Modem
TFTP Servers
...

Figure 1: IPCablecom Network Component Reference Model
4.1.1 Call destination
The Audio Server Specification shall define how announcements are provided for IPCablecom on-net to off-net and
on-net to on-net calls.
NOTE: Announcements for Off-net to on-net calls will usually be handled by the PSTN as a result of SS7
clearing messages. However when appropriate, they also may be played from the IPCablecom Media
Gateway (MG).
4.1.2 Media formats
The required media formats for announcements are specified by the IPCablecom Codecs specification
(TS 101 909-3 [6]).
4.1.3 Security
Audio shall be signalled and played in a secure manner. Security protocols defined in the IPCablecom Security
specification TS 101 909-11 [7] shall be supported in the IPCablecom Audio Server Specification.
4.1.4 Operational Support Systems
Audio Servers may be required to support the IPCablecom billing and event message protocols as defined in [8].
4.2 Announcement definitions
Announcements can be divided into four distinct categories: tones, fixed-content, variable content, and interactive
announcements.
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4.2.1 Tones
Includes tones such as reorder, busy, and ringback. See [9] for further examples.
4.2.2 Fixed-content Announcements
Fixed-content Announcements consist of audio messages with fixed-content that require no user interaction. For
example, "Your call did not go through. Please hang up and try your call again.".
4.2.3 Variable Content Announcements
Variable Content Announcements are messages that contain a customizing parameter(s) yet require no user interaction.
For example, "The number you have dialled, 32 19 876, has been changed. The new number is 32 16 789.".
4.2.4 Interactive Announcements
Interactive Announcements are announcements that require user interaction, DTMF (Dual Tone Multi-Frequency) or
IVR. For example, "The number you have dialled, 54 13 2198 76, has been changed. The new number is 54 13 2167 89.
To be connected to the new number, at a cost of thirty-five cents, please press 1.".
4.3 Architectural components
IPCablecom components responsible for providing announcement services are defined below. These components work
together to provide the complete set of announcement services available from the IPCablecom network provider. There
may be more than one of these components in the network. Figure 2 defines a logical architecture for providing
announcement services and only where an interface is exposed is it expected to meet IPCablecom specification
requirements.
4.3.1 Audio Server (AS)
An AS is a logical entity composed of a Media Player Controller (MPC) and a Media Player (MP).
4.3.1.1 Media Player Controller (MPC)
The MPC initiates and manages all announcement services provided by the Media Player. The MPC accepts requests
from the CMS and arranges for the MP to provide the announcement in the appropriate stream so that the user hears the
announcement. The MPC also serves as the termination for certain calls routed to it for IVR services. These might
include, for example, calls in which the user dials an number to reach a credit-card calling service
operated by the IPCablecom network operator. When the MP collects information from the end-user, the MPC is
responsible for interpreting this information and manage the IVR session accordingly. Hence, the MPC will manage call
state.
The MPC can be standalone, or it can be embedded within the CMS. See Figure 2 and Figure 3 for illustrations of
standalone and embedded MPC configurations.
4.3.1.2 Media Player (MP)
The Media Player is a media resource server. It is responsible for receiving and interpreting commands from the MPC
and for delivering the appropriate announcement(s) to the MTA. The MP provides the media streams with the
announcement contents. The MP also is responsible for accepting and reporting user inputs (e.g. DTMF tones). The MP
functions under the control of the MPC.
An MP can be standalone, or it can be embedded with the MPC in a Media Server. See Figure 2 and Figure 4 for
respective illustrations of the stand-alone and embedded MP configurations.
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4.3.2 Multimedia Terminal Adapter (MTA)
The MTA has the ability to provide tones and a limited set of fixed-content announcements to the user. The MTA
accepts NCS signalling requests from the CMS and plays the appropriate tones and announcements accordingly.
4.3.3 Media Gateway (MG)
The Media Gateway to the PSTN also has the ability to provide fixed-content announcements to PSTN end-users
involved in off-net to on-net calls. The MG accepts TGCP request to play announcement from the Media Gateway
Controller (MGC) and provides the announcements accordingly.
4.3.4 Media Gateway Controller (MGC)
The Media Gateway Co
...