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

• Abstract:

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

• 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

SIST-TS ETSI/TS 101 909-19-1 V1.1.1:2005 is a SIST publication of the ETSI specification for IPCablecom audio server signaling in digital broadband cable access networks. It specifies an H.248-based description as a variant of TS 101 909-19 for announcement services in voice over IP (VoIP) cable networks. The document is for engineers, integrators, and operators who need to design, implement, or test how announcements are played to callers and how digits are collected.

What does SIST-TS ETSI/TS 101 909-19-1 V1.1.1:2005 specify?

SIST-TS ETSI/TS 101 909-19-1 V1.1.1:2005 specifies the architecture, signaling interfaces, and H.248 profile used to deliver announcements in IPCablecom networks. It focuses on the audio server side of the service, including how tones, fixed announcements, variable content announcements, and interactive announcements are handled.

The document is organized into:

• Clause 1 - Scope
• Clause 2 - References
• Clause 3 - Definitions and abbreviations
• Clause 4 - Technical overview
• Clause 5 - Ann-1 interface: CMS-MTA and MGC-MG
• Clause 6 - Ann-2 interface: MPC-MP
• Annex A - Informative bibliography

Clause 4 sets out the architecture and the interface model. Clause 5 covers the legacy announcement path through NCS/TGCP, and clause 6 gives the H.248-based profile for the Media Player Controller to Media Player interface.

What are the key requirements of SIST-TS ETSI/TS 101 909-19-1 V1.1.1:2005?

SIST-TS ETSI/TS 101 909-19-1 V1.1.1:2005 defines how announcement services are built, signaled, and secured, and it sets the rules that implementers of the Media Player Controller (MPC) and Media Player (MP) must follow.

Architecture and service model

Clause 4 describes the announcement service architecture for IPCablecom networks. The Audio Server (AS) is a logical entity made of an MPC and an MP, while the Call Management Server (CMS) decides whether a tone or announcement is played at the Multimedia Terminal Adapter (MTA), the AS, or the Media Gateway (MG). In practice, this means the same service can be delivered by local playback at the edge or by a network media server, depending on call state and resource use.

Clause 4 also classifies announcements into four types: tones, fixed-content announcements, variable-content announcements, and interactive announcements. That distinction matters because some services only need a recorded message, while others must collect user input through Dual Tone Multi-Frequency (DTMF) or Interactive Voice Response (IVR).

Ann-1 and local announcement playback

Clause 5 defines the Ann-1 path for CMS-MTA and MGC-MG signaling using the legacy audio package in NCS/TGCP. The MTA may store simple announcements locally, and the MG may play fixed-content announcements to Public Switched Telephone Network (PSTN) users on off-net to on-net calls. In practice, this keeps common call-progress messages close to the caller and reduces network resource use.

Clause 5.1.1 gives the local announcement set expected on an MTA, including network condition prompts and branding messages. It also shows that announcement storage depends on the codec used, which is important for device memory planning and provisioning.

H.248 profile for Ann-2

Clause 6 defines the Ann-2 interface as an H.248 profile named “IPCablecom Audio Server” version 1.0. The profile requires support for the Generic, Root, Network, Advanced Audio Server (aas), and AAS Digit Collection (aasdc) packages. Optional support may include AAS Recording, AAS segment management, and security. For implementers, this means base interoperability depends on a defined core package set, while extra features are added only where needed.

Clause 6.2 relies on the H.248 compatibility rules for packages, signals, events, properties, statistics, and the protocol itself. Clause 6.6 requires UDP/ALF transport for both MPs and MPCs, clause 6.7 allows one primary and one or more secondary MPCs for registration, and clause 6.8 requires IPsec and Internet Key Exchange (IKE) for key management. These rules shape network design, failover planning, and security configuration.

Naming, topology, and session control

Clause 6.3 requires MP and MPC names to be domain names and ties resilience to Domain Name Service (DNS) behavior. The implementation must retry another address if one fails and must refresh DNS data when time-to-live expires. Clause 6.4 states that Topology need not be implemented. Clause 6.5 says all H.248 transaction timers apply, and clause 6.12 requires Digit Maps from the H.248 audio server package. In practice, this affects endpoint discovery, call flow robustness, and digit collection for IVR services.

SDP and media handling

Clause 6.10 constrains Session Description Protocol (SDP) usage to audio media and gives field-by-field rules for what must be sent, what may be ignored, and what values are allowed. It specifies transport as RTP/AVP, requires unicast connection addresses, and defines how attributes such as rtpmap, codec lists, security-related attributes, recvonly/sendrecv/sendonly, and ptime are used. This section is the main interoperability rule set for media negotiation.

Clause 6.11 says timestamps are not required in every Notify command. That matters for implementations that generate event reports without adding unnecessary signaling overhead.

What terms does SIST-TS ETSI/TS 101 909-19-1 V1.1.1:2005 define?

SIST-TS ETSI/TS 101 909-19-1 V1.1.1:2005 defines a small set of service terms that frame the audio-server model.

• Announcement - an audio item to be played, made of one or more audio segments.
• Cable modem - the layer two termination device at the customer end of the J.112 connection.
• Digit map - one or more digit patterns to be collected, used for call routing or IVR input.
• IPCablecom - the ETSI working group project and service architecture for real-time services over cable networks using cable modems.
• Off-net - a call or data session where one endpoint is connected to IPCablecom and the other is on another network.
• On-net - a call or data session where both endpoints are on the same IPCablecom network.
• Audio Server (AS) - the logical service entity composed of an MPC and an MP.
• Media Player Controller (MPC) - the control entity that starts and manages announcement services and manages call state.

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

SIST-TS ETSI/TS 101 909-19-1 V1.1.1:2005 is used by cable telephony and VoIP engineers who design announcement services in IPCablecom networks. It is also relevant to vendors of CMS, MPC, MP, MTA, MGC, and MG equipment, because it defines how those components signal, negotiate media, and handle digits.

Quality managers and buyers use it to check whether a platform supports the expected H.248 package set, SDP rules, security methods, and announcement behavior. Operators and provisioning teams use it when deciding whether announcements are stored locally, delivered by a media server, or played from the gateway side of the network.

Which standards are used with SIST-TS ETSI/TS 101 909-19-1 V1.1.1:2005?

This standard depends on several IPCablecom and IETF/ITU-T documents:

• ETSI TS 101 909-2 - provides the IPCablecom architectural framework for cable networks.
• ETSI TS 101 909-3 - defines the audio codec requirements for announcement media.
• ETSI TS 101 909-10 - covers event message requirements for real-time services.
• ETSI TS 101 909-11 - provides the IPCablecom security specification.
• ETSI TS 101 909-13 - defines Trunking Gateway Control Protocol (TGCP).
• ETSI TS 101 909-16 - is referenced for the CMS signaling work related to Ann-3.
• ETSI TS 101 909-19-2 - is the companion part for the MGCP option.
• ITU-T Recommendation H.248 - defines the gateway control protocol and the Annex M.1 audio server packages used here.
• IETF RFC 2327 - defines SDP, which this profile constrains for audio sessions.
• IETF RFC 2401 and RFC 2409 - provide IPsec and IKE for security.
• ITU-T Recommendation E.182 and ETSI ETR 187 - support the tone and announcement examples.

What does the SIST-TS ETSI/TS 101 909-19-1 V1.1.1:2005 document contain?

The document contains a network architecture overview, interface descriptions, and detailed signaling rules for announcement delivery. It also includes a local announcement list for MTAs, a storage example for announcement playback, and a complete H.248 profile for the MPC-MP interface.

Clause 6 is the most technical part: it lays out package support, naming rules, transport, security, SDP fields, media announcement handling, and Digit Map support. The tables and figures are used for interoperability design, implementation checks, and conformance testing of announcement services in IPCablecom networks.

Annex A is an informative bibliography that points readers to the companion IPCablecom parts, H.248 Annex M.1, and related ITU-T and IETF specifications.

SLOVENSKI STANDARD
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.

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
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
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
Individual copies of the present document can be downloaded from:
http://www.etsi.org
The present document may be made available in more than one electronic version or in print. In any case of existing or
perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF).
In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive
within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, send your comment to:
[e-mail]
Copyright Notification
No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.

© European Telecommunications Standards Institute 2002.
All rights reserved.
TM TM TM
DECT , PLUGTESTS and UMTS are Trade Marks of ETSI registered for the benefit of its Members.
TM
TIPHON and the TIPHON logo are Trade Marks currently being registered by ETSI for the benefit of its Members.
TM
3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners.
ETSI
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
4 ETSI TS 101 909-19-1 V1.1.1 (2002-03)
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
5 ETSI TS 101 909-19-1 V1.1.1 (2002-03)
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
6 ETSI TS 101 909-19-1 V1.1.1 (2002-03)
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
7 ETSI TS 101 909-19-1 V1.1.1 (2002-03)
[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
ETSI
8 ETSI TS 101 909-19-1 V1.1.1 (2002-03)
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
9 ETSI TS 101 909-19-1 V1.1.1 (2002-03)
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.
ETSI
10 ETSI TS 101 909-19-1 V1.1.1 (2002-03)
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.
ETSI
11 ETSI TS 101 909-19-1 V1.1.1 (2002-03)
4.3.2 Multimedia Terminal Adapter (MTA)
The
...