ETSI TS 103 161-2 V1.1.1 (2011-10)

Access, Terminals, Transmission and Multiplexing (ATTM); Integrated Broadband Cable and Television Networks; IPCablecom 1.5; Part 2: Architectural framework for the delivery of time critical services over Cable Television Networks using Cable Modems

DTS/ATTM-003011-2

General Information

• Status: Published
• Publication Date: 26-Oct-2011
• Technical Committee: ATTM AT3 - Integrated broadband cable and television networks
• Current Stage: 12 - Completion
• Due Date: 31-Oct-2011
• Completion Date: 27-Oct-2011

Standards Content (Sample)

Technical Specification
Access, Terminals, Transmission and Multiplexing (ATTM);
Integrated Broadband Cable and Television Networks;
IPCablecom 1.5;
Part 2: Architectural framework for the delivery of
time critical services over Cable Television Networks
using Cable Modems
2 ETSI TS 103 161-2 V1.1.1 (2011-10)

Reference
DTS/ATTM-003011-2
Keywords
access, broadband, cable, IP, 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, please send your comment to one of the following services:
http://portal.etsi.org/chaircor/ETSI_support.asp
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 2011.
All rights reserved.
TM TM TM
DECT , PLUGTESTS , UMTS and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members.
TM
3GPP and LTE™ are Trade Marks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI
3 ETSI TS 103 161-2 V1.1.1 (2011-10)
Contents
Intellectual Property Rights . 5
Foreword . 5
1 Scope . 7
1.1 IPCablecom Overview . 7
1.2 IPCablecom Motivation . 7
1.3 IPCablecom Project Phasing . 7
2 References . 8
2.1 Normative references . 8
2.2 Informative references . 8
3 Definitions and abbreviations . 10
3.1 Definitions . 10
3.2 Abbreviations . 11
4 Void . 13
5 IPCablecom 1.5 . . 13
5.1 IPCablecom Architecture Framework . 14
5.2 IPCablecom Zones and Domains . 15
5.3 IPCablecom 1.5 Analog Trunking Specifications . 15
5.4 IPCablecom 1.5 Design Considerations . 16
5.4.1 General Architectural Goals . 16
5.4.2 Call Signalling . 17
5.4.3 Quality of Service . 18
5.4.4 CODEC and Media Stream . 18
5.4.5 Device Provisioning and OSS . 18
5.4.6 Security . 19
5.4.7 Lawful Interception. 19
6 IPCablecom Functional Components . 19
6.1 Media Terminal Adapter (MTA) . 20
6.1.1 MTA Functional Requirements . 20
6.1.2 MTA Attributes . 20
6.2 Cable Modem (CM) . 21
6.3 HFC Access Network . 21
6.4 Cable Modem Termination System (CMTS) . 21
6.4.1 CMTS Gate . 22
6.5 Call Management Server (CMS) . 22
6.6 PSTN Gateway . 23
6.6.1 Media Gateway Controller (MGC) . 23
6.6.2 Media Gateway (MG) . 23
6.6.2.1 Media Gateway Functions . 24
6.6.3 Signalling Gateway (SG) . 24
6.6.3.1 SS7 Signalling Gateway Functions . 24
6.7 OSS Back Office Components . 25
6.7.1 Security Server - Key Distribution Centre (KDC) . 25
6.7.2 Dynamic Host Configuration Protocol Server (DHCP) . 25
6.7.3 Domain Name System Server (DNS) . 25
6.7.4 Trivial File Transfer Protocol Server or Hypertext Transfer Protocol Server (TFTP or HTTP) . 25
6.7.5 SYSLOG Server (SYSLOG) . 25
6.7.6 Record Keeping Server (RKS). 25
6.8 Announcement Server (ANS). 25
6.8.1 Announcement Controller (ANC) . 26
6.8.2 Announcement Player (ANP) . 26
7 Protocol Interfaces . 26
7.1 Call Signalling Interfaces . 26
ETSI
4 ETSI TS 103 161-2 V1.1.1 (2011-10)
7.1.1 Network-based Call Signalling (NCS) Framework . 27
7.1.2 PSTN Signalling Framework . 28
7.1.3 CMS to CMS Signalling Framework . 28
7.2 Media Streams . 28
7.2.1 Real-time Transport Control Protocol (RTCP) . 30
7.3 MTA Device Provisioning . 31
7.4 SNMP Element Management Layer Interfaces . 32
7.5 Event Messages Interfaces . 32
7.5.1 Event Message Framework . 32
7.6 Quality of Service (QoS) . 34
7.6.1 QoS Framework . 34
7.6.2 Dynamic Quality of Service. 35
7.7 CMS Subscriber Provisioning . 36
7.8 Lawful Interception . 37
7.9 Security . 37
7.9.1 Overview . 37
7.9.2 Device Provisioning Security . 40
7.9.2.1 Subscriber Enrolment . 40
7.9.2.2 Device Provisioning . 40
7.9.2.3 Dynamic Provisioning . 40
7.9.2.4 Device Authorization . 40
7.9.2.5 Signalling Security . 41
7.9.2.6 Media Stream Security . 41
7.9.2.7 OSS and Billing System Security . 41
8 Network Design Considerations . 41
8.1 Time Keeping and Reporting Issues . 41
8.2 Timing for Playout Buffer Alignment with Coding Rate . 41
8.3 IP Addressing . 42
8.4 Dynamic IP Address Assignment . 42
8.5 Fully Qualified Domain Name (FQDN) Assignment . 42
8.6 Priority Marking of Signalling and Media Stream Packets . 42
8.7 Fax Support . 43
8.8 Analog Modem Support . 43
8.9 DTMF Relay . 44
History . 45

ETSI
5 ETSI TS 103 161-2 V1.1.1 (2011-10)
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://ipr.etsi.org).
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 Access, Terminals, Transmission
and Multiplexing (ATTM).
The present document is part 2 of a multi-part IPCablecom 1.5 deliverable covering the Digital Broadband Cable
Access to the Public Telecommunications Network; IP Multimedia Time Critical Services, as identified below:
Part 1: "Overview";
Part 2: "Architectural framework for the delivery of time critical services over Cable Television Networks
using Cable Modems";
Part 3: "Audio Codec Requirements for the Provision of Bi-Directional Audio Service over Cable Television
Networks using Cable Modems";
Part 4: "Network Call Signalling Protocol";
Part 5: "Dynamic Quality of Service for the Provision of Real Time Services over Cable Television Networks
using Cable Modems";
Part 6: "Event Message Specification";
Part 7: "Media Terminal Adapter (MTA Management Information Base (MIB)";
Part 8: "Network Call Signalling (NCS) MIB Requirements";
Part 9: "Security";
Part 10: "Management Information Base (MIB) Framework";
Part 11: "Media terminal adapter (MTA) device provisioning";
Part 12: "Management Event Mechanism";
Part 13: "Trunking Gateway Control Protocol - MGCP option";
Part 14: "Embedded MTA Analog Interface and Powering Specification"
Part 15: "Analog Trunking for PBX Specification";
Part 16: "Signalling for Call Management Server";
Part 17: "CMS Subscriber Provisioning Specification";
Part 18: "Media Terminal Adapter Extension MIB";
Part 19: "IPCablecom Audio Server Protocol Specification - MGCP option";
Part 20: "Management Event MIB Specification";
ETSI
6 ETSI TS 103 161-2 V1.1.1 (2011-10)
Part 21: "Signalling Extension MIB Specification".
NOTE 1: Additional parts may be proposed and will be added to the list in future versions.
NOTE 2: The choice of a multi-part format for this deliverable is to facilitate maintenance and future
enhancements.
ETSI
7 ETSI TS 103 161-2 V1.1.1 (2011-10)
1 Scope
1.1 IPCablecom Overview
The IPCablecom project defines interface specifications that can be used to develop interoperable equipment capable of
providing packet-based voice, video and other high-speed multimedia services over hybrid fibre coax (HFC) cable
® ®
systems utilizing the DOCSIS protocol [i.14]. Any reference to DOCSIS in the present document is understood to be ®
DOCSIS version 1.1 or later.
IPCablecom defines a communication services architecture that overlays the two-way data-ready broadband cable
access network. Within the overall IPCablecom framework, IPCablecom version 1.5, which is the subject of this
Technical Report, is designed to provide digital voice and telephony services.
The objective of this IPCablecom Architecture Technical Report is to provide a high-level reference framework that
identifies the functional components and defines the interfaces necessary to implement the capabilities detailed in the
individual IPCablecom 1.5 specifications as listed in clause 5.3.
1.2 IPCablecom Motivation
The emergence of the Internet Protocol (IP) as the standard transport for packet data networks has enabled a revolution
in communications services and applications.
NOTE: IPCablecom 1.5 supports only IPv4 at the present time.
This online revolution is demonstrated by the widespread use of email, chat groups, music, video, and the explosive
growth of the World Wide Web for entertainment, information exchange, online commerce, and a wide range of new
and innovative services. New classes of IP-based information appliances are also emerging, including multimedia
personal computers, IP-based set top boxes, and IP-based voice and videophones.
In recent years the growth of a worldwide IP-based data network, coupled with the rapid growth in the number of
households that have online access, have resulted in an environment that allows service providers to offer integrated
voice and data services over a common broadband cable access network and IP transport backbone. While the initial
application of Voice over IP (VoIP) technology was for toll bypass services (particularly high-cost international toll
service) the technology is now sufficiently mature that it is feasible to offer IP-based voice communication services
similar to those offered by telecommunications carriers on the Public Switched Telephone Network (PSTN).
® ®
With the success of the DOCSIS standardization effort, the Quality of Service (QoS) enhancements of DOCSIS , and
the acceleration of major cable system upgrades for two-way capability, the infrastructure is in place for development
and deployment of packetized voice and video applications. These applications can be deployed with limited
incremental cost, providing a technically distinctive and cost-effective alternative for subscribers' voice communications
needs, as well as a platform for introducing the next generation of voice and other real-time multimedia services.
1.3 IPCablecom Project Phasing
The IPCablecom architecture is designed to be a robust, complete, end-to-end broadband architecture that supports
voice, video, and other multimedia services. The architecture is capable of supporting millions of subscribers over
multiple cable operator networks.
It is understood that the initial focus of the IPCablecom architecture is to support the time-to-market business
considerations for deploying packet-based services. Going forward, the IPCablecom architecture will continue to evolve
to meet Member business requirements and to accommodate advances resulting from the maturing of IP-based
technology. The IPCablecom project will release specifications that define this architecture in a phased approach
according to technical feasibility and business priority. As new IPCablecom specifications are released, they will
complement the previously released specifications.
ETSI
8 ETSI TS 103 161-2 V1.1.1 (2011-10)
2 References
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
reference document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
2.1 Normative references
The following referenced documents are necessary for the application of the present document.
Not applicable.
2.2 Informative references
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
[i.1] ETSI TS 103 161-3: "Access, Terminals, Transmission and Multiplexing (ATTM); Integrated
Broadband Cable and Television Networks; IPCablecom 1.5; Part 3: Audio Codec Requirements
for the Provision of Bi-Directional Audio Service over Cable Television Networks using Cable
Modems".
[i.2] ETSI TS 103 161-5: "Access, Terminals, Transmission and Multiplexing (ATTM); Integrated
Broadband Cable and Television Networks; IPCablecom 1.5 Part 5: Dynamic Quality of Service
for the Provision of Real Time Services over Cable Television Networks using Cable Modems".
[i.3] ETSI TS 103 161-4: "Access, Terminals, Transmission and Multiplexing (ATTM); Integrated
Broadband Cable and Television Networks; IPCablecom 1.5 Part 4: Network Call Signalling
Protocol".
[i.4] ETSI TS 103 161-6: "Access, Terminals, Transmission and Multiplexing (ATTM); Integrated
Broadband Cable and Television Networks; IPCablecom 1.5; Part 6: Event Message
Specification".
[i.5] ETSI TS 103 161-7: "Access, Terminals, Transmission and Multiplexing (ATTM); Integrated
Broadband Cable and Television Networks; IPCablecom 1.5 Part 7: Media Terminal Adapter
(MTA) Management Information Base (MIB)".
[i.6] ETSI TS 103 161-8: "Access, Terminals, Transmission and Multiplexing (ATTM); Integrated
Broadband Cable and Television Networks; IPCablecom 1.5 Part 8: Network Call Signalling
(NCS) MIB Requirements".
[i.7] ETSI TS 103 161-10: "Access, Terminals, Transmission and Multiplexing (ATTM); Integrated
Broadband Cable and Television Networks; IPCablecom 1.5 Part 10: Management Information
Base (MIB) Framework".
[i.8] ETSI TS 103 161-13: "Access, Terminals, Transmission and Multiplexing (ATTM); Integrated
Broadband Cable and Television Networks; IPCablecom 1.5 Part 13: Trunking Gateway Control
Protocol - MGCP option".
[i.9] ETSI TS 103 161-11: "Access, Terminals, Transmission and Multiplexing (ATTM); Integrated
Broadband Cable and Television Networks; IPCablecom 1.5 Part 11: Media Terminal Adapter
(MTA) device provisioning".
[i.10] ETSI TS 103 161-9: "Access, Terminals, Transmission and Multiplexing (ATTM); Integrated
Broadband Cable and Television Networks; IPCablecom 1.5 Part 9: Security".
ETSI
9 ETSI TS 103 161-2 V1.1.1 (2011-10)
[i.11] ETSI TS 103 161-16: "Access, Terminals, Transmission and Multiplexing (ATTM); Integrated
Broadband Cable and Television Networks; IPCablecom 1.5; Part 16: Signalling for Call
Management Server".
[i.12] ETSI TS 103 161-17: "Access, Terminals, Transmission and Multiplexing (ATTM); Integrated
Broadband Cable and Television Networks; IPCablecom 1.5; Part 17: CMS Subscriber
Provisioning Specification".
[i.13] ETSI TS 102 836-1 (V1.1.1): " Access, Terminals, Transmission and Multiplexing (ATTM);
Lawful Interception (LI); Part 1: Interception of IP Telephony Service on Cable Operator's
Broadband IP Network: Internal Network Interfaces".
[i.14] ETSI ES 201 488-2: "Access and Terminals (AT); Data Over Cable Systems; Part 2: Radio
Frequency Interface Specification".
[i.15] IETF RFC 1889: "RTP: A Transport Protocol for Real-Time Application", January 1996.
[i.16] IETF RFC 2327: "SDP: Session Description Protocol", April 1998.
[i.17] IETF RFC 2131: "Dynamic Host Configuration Protocol", March 1997.
[i.18] IETF RFC 1890: "RTP Profile for Audio and Video Conferences with Minimal Control",
January 1996.
[i.19] IETF RFC 1119: "Network Time Protocol", September 1989.
[i.20] IETF RFC 2748: "The COPS (Common Open Policy Service) Protocol", January 2000.
[i.21] IETF RFC 2865: "Remote Authentication Dial In User Service (RADIUS)", June 2000.
[i.22] IETF RFC 2866: "RADIUS Accounting", June 2000.
[i.23] IETF RFC 3260: "New Terminology and Clarifications for Diffserv", April 2002.
[i.24] IETF RFC 2474: "Definition of the Differentiated Services Field (DS Field) in the IPv4 and IPv6
Headers", December 1998.
[i.25] IETF RFC 3168: "The Addition of Explicit Congestion Notification (ECN) to IP",
September 2001.
[i.26] IETF RFC 3261: "SIP: Session Initiation Protocol", June 2002.
[i.27] IETF RFC 3611: "RTP Control Protocol Extended Reports (RTCP XR)", November 2003.
[i.28] IETF RFC 3414/STD0062: "User-based Security Model (USM) for version 3 of the Simple
Network Management Protocol (SNMPv3)", December 2002.
[i.29] IETF RFC 3415/STD0062: "View-based Access Control Model (VACM) for the Simple Network
Management Protocol (SNMP)", December 2002.
[i.30] IETF RFC 2833: "RTP Payload for DTMF Digits, Telephony Tones and Telephony Signals",
May 2000.
[i.31] IETF RFC 3435: "Media Gateway Control Protocol (MGCP) Version 1.0", January 2003.
[i.32] ITU-T Recommendation T.38: "Procedures for Real-Time Group 3 Facsimile Communication
over IP Networks", April 2004.
[i.33] ITU-T Recommendation G.711: "Pulse Code Modulation (PCM) Of Voice Frequencies",
November 1988.
[i.34] ITU-T Recommendation V.152: "Procedures for supporting Voice-Band Data over IP Networks",
January 2005.
[i.35] ETSI ES 201 671: "Lawful Interception (LI); Handover interface for the lawful interception of
telecommunications traffic".
ETSI
10 ETSI TS 103 161-2 V1.1.1 (2011-10)
[i.36] ETSI TS 101 671: "Lawful Interception (LI); Handover interface for the lawful interception of
telecommunications traffic".
[i.37] ETSI TS 102 232: "Lawful Interception (LI); Handover specification for IP delivery".
[i.38] ETSI TS 103 161-1: "Access, Terminals, Transmission and Multiplexing (ATTM); Integrated
Broadband Cable and Television Networks; IPCablecom 1.5 Part 1: Overview".
[i.39] ETSI TS 103 161-12: "Access, Terminals, Transmission and Multiplexing (ATTM); Integrated
Broadband Cable and Television Networks; IPCablecom 1.5 Part 12: Management Event
Mechanism".
[i.40] ETSI TS 103 161-14: "Access, Terminals, Transmission and Multiplexing (ATTM); Integrated
Broadband Cable and Television Networks; IPCablecom 1.5; Part 14: Embedded MTA Analog
Interface and Powering Specification".
[i.41] ETSI TS 103 161-18: "Access, Terminals, Transmission and Multiplexing (ATTM); Integrated
Broadband Cable and Television Networks; IPCablecom 1.5 Part 18: Media Terminal Adapter
Extension MIB".
[i.42] ETSI TS 103 161-19: "Access, Terminals, Transmission and Multiplexing (ATTM); Integrated
Broadband Cable and Television Networks; IPCablecom 1.5 Part 19: IPCablecom Audio Server
Protocol Specification - MGCP option".
[i.43] ETSI TS 103 161-20: "Access, Terminals, Transmission and Multiplexing (ATTM); Integrated
Broadband Cable and Television Networks; IPCablecom 1.5; Part 20: Management Event MIB
Specification".
[i.44] ETSI TS 103 161-21: "Access, Terminals, Transmission and Multiplexing (ATTM); Integrated
Broadband Cable and Television Networks; IPCablecom 1.5; Part 21: Signalling Extension MIB
Specification".
[i.45] Telcordia GR-909: "Generic Criteria for Fiber in the Loop Systems", December 2004.
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
access control: limiting the flow of information from the resources of a system only to authorized persons, programs,
processes or other system resources on a network
admitted: allowed
asymmetric key: encryption key or decryption key used in a public key cryptography, where encryption and decryption
keys are always distinct
authentication: process of verifying the claimed identity of an entity to another entity
authorization: act of giving access to a service or device if one has the permission to have the access
cipher: algorithm that transforms data between plaintext and ciphertext
ciphersuite: set which contains both an encryption algorithm and a message authentication algorithm (e.g. a MAC or an
HMAC)
NOTE: In general, it may also contain a key management algorithm, which does not apply in the context of
IPCablecom.
ciphertext: (encrypted) message output from a cryptographic algorithm that is in a format that is unintelligible
ETSI
11 ETSI TS 103 161-2 V1.1.1 (2011-10)
confidentiality: a way to ensure that information is not disclosed to anyone other than the intended parties; information
is encrypted to provide confidentiality
cryptographic algorithm: algorithm used to transfer text between plaintext and ciphertext
decryption: procedure applied to ciphertext to translate it into plaintext
diffserv (also known as Differentiated Services): IETF architecture for implementing scalable service differentiation in
the Internet (see RFC 3260 [i.23])
digital certificate: binding between an entity's public key and one or more attributes relating to its identity, also known
as a public key certificate.
digital signature: data value generated by a public key algorithm based on the contents of a block of data and a private
key, yielding an individualized cryptographic checksum
downstream: direction from the head-end toward the subscriber location
encryption: method used to translate information in plaintext into ciphertext
endpoint: Terminal, Gateway or MCU.
event message: message capturing a single portion of a call connection
Exterior Border Proxy (EBP): proxy involved in inter-domain communication used to communicate between different
domains
NOTE: Every non-isolated domain has interfaces with one or more other domains via one or more Exterior
Border Proxies.
gateway: devices bridging between the IPCablecom IP Telephony world and the PSTN
header: protocol control information located at the beginning of a protocol data unit
integrity: a way to ensure that information is not modified except by those who are authorized to do so
jitter: variability in the delay of a stream of incoming packets making up a flow such as a voice call
Kerberos: secret-key network authentication protocol that uses a choice of cryptographic algorithms for encryption and
a centralized key database for authentication
key: mathematical value input into the selected cryptographic algorithm.
key exchange: swapping of public keys between entities to be used to encrypt communication between the entities
key management: process of distributing shared symmetric keys needed to run a security protocol
latency: time, expressed in quantity of symbols, taken for a signal element to pass through a device
Media Player (MP): device responsible for receiving and interpreting commands from the Media Player Controller and
for delivering appropriate announcement(s) to the MTA
Media Player Controller (MPC): device that initiates and manages all announcement services provided by the media
player.
network management: functions related to the management of data across the network
transit delays: time difference between the instant at which the first bit of a PDU crosses one designated boundary, and
the instant at which the last bit of the same PDU crosses a second designated boundary
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ANC Announcement Controller
ANP Announcement Player
ETSI
12 ETSI TS 103 161-2 V1.1.1 (2011-10)
ANS Announcement Server
ASP Audio Server Protocol
BPI+ Baseline Privacy Interface Plus
CA Call Agent
CDR Call Detail Record
CIC Circuit Identification Code
CLASS Custom Local Area Signalling Services ®
CM DOCSIS Cable Modem
CMS Call Management Server
CMTS Cable Modem Termination System
CODEC COder-DECoder
COPS Common Open Policy Service
DHCP Dynamic Host Configuration Protocol
DNS Domain Name System ®
DOCSIS Data Over Cable System Interface Specification
DQoS Dynamic Quality of Service
DSCP Differentiated Services Code Point
DTMF Dual-Tone Multi Frequency (tones)
E-MTA Embedded MTA
FQDN Fully Qualified Domain Name
GC Gate Controller
HDBH High Day Busy Hour
HFC Hybrid Fibber/Coaxial cable
HTTP Hyper Text Transfer Protocol
IKE Internet Key Exchange
IKE+ Internet Key Exchange Plus (requiring digital certificates for authentication)
IP Internet Protocol
IPsec Internet Protocol Security
ISDN Integrated Services Digital Network
ISUP ISDN User Part
KDC Key Distribution Centre
LATA Local Access and Transport Area
LEA Law Enforcement Agency
LNP Local Number Portability
MAC Media Access Control
MG Media Gateway
MGC Media Gateway Controller
MGCP Media Gateway Control Protocol
MIB Management Information Base
MSO Multi-System Operator
MTA Media Terminal Adapter
MTP Message Transfer Part
NAT Network Address Translation
NCS Network-based Call Signalling
NTP Network Time Protocol
OSS Operations Systems Support
PCM Pulse Code Modulation
PHY Physical Layer
PKINIT Public Key Cryptography Initial Authentication
POTS Plain Old Telephone Service
PSTN Public Switched Telephone Network
PT Payload Type
QoS Quality of Service
RADIUS Remote Access Dial-In User Service
RFC Request for Comments
RFI Radio Frequency Interface
RKS Record Keeping Server
RTCP Real Time Control Protocol
RTP Real-time Transport Protocol
SCCP Signalling Connection Control
SCP A Service Control Point
SDP Session Description Protocol
ETSI
13 ETSI TS 103 161-2 V1.1.1 (2011-10)
SG Signalling Gateway
SID Service ID
SIP Session Initiation Protocol
SNMP Simple Network Management Protocol
SS7 Signalling System Number 7
TCAP Transaction Capabilities Application Protocol
TFTP Trivial File Transfer Protocol
TGS Ticket Granting Server used to grant Kerberos tickets
TOS Type of Service
UDP User Datagram Protocol
UTC Universal Time Coordinated
VoIP Voice over IP
4 Void
5 IPCablecom 1.5
IPCablecom 1.5 is a definition for the specifications that define the IPCablecom 1.5 reference architecture.
In this version of the architecture framework, the emphasis is on specification of: ®
• the subscriber environment and its interface requirements to the IPCablecom network including the DOCSIS
HFC access network, Call Management Server, PSTN gateway, and MTA device provisioning components
(refer to clause 5.1 and subsequent subclauses for a description of these components);
• communication across IPCablecom zones and domains to enable end-to-end IP-based connections (refer to
clause 5.2 and subsequent subclauses for a description of zones and domains);
• reliability mechanisms such as availability during power failure;
• electronic surveillance capabilities.
The requirements for these functional components and the standardized interfaces between components are defined in
detail in the IPCablecom 1.5 specifications.
IPCablecom 1.5 consists of a variety of functional components, each of which must work in harmony to create a
consistent and cost-effective delivery mechanism for packet-based services. This distributed architecture allows
incremental development and deployment of new features and services, leaving room for implementation flexibility and
product innovation. A key focus of the IPCablecom 1.5 release is the definition of low-cost subscriber equipment and a
network architecture that supports digital voice services. Follow-on phases of this project will continue to add support
for more advanced functionality. This may require evolution in the IPCablecom call signalling, QoS security,
provisioning, billing and security protocols.
IPCablecom 1.5 allows the use of proprietary vendor-specific solutions for interfaces not defined in specifications.
ETSI
14 ETSI TS 103 161-2 V1.1.1 (2011-10)
5.1 IPCablecom Architecture Framework ®
At a very high level, the IPCablecom 1.5 architecture contains three networks: the "DOCSIS HFC Access Network",
the "Managed IP Network" and the PSTN. The Cable Modem Termination System (CMTS) provides connectivity ®
between the "DOCSIS HFC Access Network" and the "Managed IP Network". Both the Signalling Gateway (SG) and
the Media Gateway (MG) provide connectivity between the "Managed IP Network" and the PSTN. The reference
architecture for IPCablecom 1.5 is shown in figure 1.

Figure 1: IPCablecom Reference Architecture ®
The DOCSIS HFC access network provides high-speed, reliable, and secure transport between the customer premise ®
and the cable headend. The access network provides DOCSIS capabilities, including Quality of Service. The ®
DOCSIS HFC access network includes the following functional components: the Cable Modem (CM), the Media
Terminal Adapter (MTA), and the Cable Modem Termination System (CMTS).
The Managed IP network serves several functions. First, it provides interconnection between the basic IPCablecom
functional components that are responsible for signalling, media, provisioning, and the establishment of Quality of
Service on the access network. In addition, the managed IP network provides long-haul IP connectivity between other ®
Managed IP and DOCSIS HFC networks. The Managed IP network includes the following functional components:
Call Management Server (CMS), several Operational Support System (OSS) back-office servers, Signalling Gateway
(SG), Media Gateway (MG), and Media Gateway Controller (MGC).
The individual network components that are shown in figure 1 are described in detail in clause 6.
ETSI
15 ETSI TS 103 161-2 V1.1.1 (2011-10)
5.2 IPCablecom Zones and Domains
Administrative Domain 1 Administrative Domain 2
`
MSO A MSO B
CMS CMS
Zone 1 Zone 3
`
PSTN
PSTN
Gateway
Managed
IP Backbone
` MSO C
CMS
Zone 4
MSO A `
CMS
Zone 2
PSTN
PSTN
`
Gateway
PSTN
PSTN
Gateway
Administrative Domain 3
Figure 2: Zones and Administrative Domains ®
An IPCablecom zone consists of the set of MTAs in one or more DOCSIS HFC access networks that are managed by a
single functional CMS as shown in figure 2. IPCablecom 1.5 defines both interfaces between functional components
within a single zone and interfaces between zones (e.g. CMS-CMS).
An IPCablecom domain is made up of one or more IPCablecom zones that are operated and managed by a single
administrative entity. An IPCablecom domain may also be referred to as an administrative domain. IPCablecom 1.5
defines interfaces between domains.
5.3 IPCablecom 1.5 Analog Trunking Specifications
IPCablecom 1.5 consists of the twenty Technical Specifications shown in table 1.
ETSI
16 ETSI TS 103 161-2 V1.1.1 (2011-10)
Table 1: IPCablecom 1.5 Specifications and Reports
IPCablecom Technical Document Brief Document Description
Reference Number
TS 103 161-1 [i.38] IPCablecom 1.5 Overview
TR 103 161-2 Architecture Framework (the present document)
TS 103 161-3 [i.1] Audio/Video Codecs
TS 103 161-4 [i.3] Network-based Call Signalling (NCS)
TS 103 161-5 [i.2] Dynamic Quality-of-Service
TS 103 161-6 [i.4] Event Messages
TS 103 161-7 [i.5] MTA MIB
TS 103 161-8 [i.6] MTA Signalling MIB
TS 103 161-9 [i.10] Security
TS 103 161-10 [i.7] MIB Framework
TS 103 161-11 [i.9] MTA Device Provisioning
TS 103 161-12 [i.39] Management Event Mechanism
TS 103 161-13 [i.8] PSTN Gateway Call Signalling Protocol
TS 103 161-14 [i.40] Analog Interface and Powering
TS 103 161-16 [i.11] CMS to CMS Signalling
TS 103 161-17 [i.12] CMS Subscriber Provisioning
TS 103 161-18 [i.41] MTA MIB Extensions
TS 103 161-19 [i.42] Audio Server Protocol
TS 103 161-20 [i.43] MTA Event MIB
TS 103 161-21 [i.44] MTA Signalling MIB Extensions
TS 102 836-1 [i.13] Lawful Intercept

5.4 IPCablecom 1.5 Design Considerations
In order to enable real-time multimedia communications across the cable network infrastructure, IPCablecom 1.5
specifications define protocols in the following areas:
• Call Signalling.
• Quality of Service.
• Media Stream Transport and Encoding.
• Device Provisioning.
• Event Messaging.
• Security.
• Electronic Surveillance.
• Operational Support Systems.
This clause provides an overview of the high-level design goals and concepts used in developing the specifications that
define the IPCablecom 1.5 reference architecture. Individual IPCablecom specifications should be consulted to obtain
detailed protocol requirements for each of these areas.
5.4.1 General Architectural Goals
• Enable voice quality capabilities similar to or better than the PSTN as perceived by the end-user.
• Provide a network architecture that is scalable and capable of supporting millions of subscribers.
• Ensure the one-way delay for local IP access and IP egress (i.e. excluding the IP backbone network) is less
than 45 ms.
ETSI
17 ETSI TS 103 161-2 V
...