T-REC-J.460.2-200806-I!!PDF-E.pdf

I n t e r n a t i o n a l T e l e c o m m u n i c a t i o n U n i o n ITU-T J.460.2 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (06/2008) SERIES J: CABLE NETWORKS AND TRANSMISSION OF TELEVISION, SOUND PROGRAMME AND OTHER MULTIMEDIA SIGNALS IPCablecom2 residential SIP telephony: embedded digital voice adapter (E-DVA) specification Recommendation ITU-T J.460.2 Rec. ITU-T J.460.2 (06/2008) i Recommendation ITU-T J.460.2 IPCablecom2 residential SIP telephony: embedded digital voice adapter (E-DVA) specification Summary Recommendation ITU-T J.460.2 defines the embedded Digital Voice Adaptor (E-DVA) requirements for the analog interface and for powering of the E-DVA. An embedded DVA is a DOCSIS cable modem (CM) integrated with an IPCablecom2 DVA. These requirements enable a sufficiently reliable service to meet assumed consumer expectations related to residential telephony. Source Recommendation ITU-T J.460.2 was approved on 13 June 2008 by ITU-T Study Group 9 (2005-2008) under Recommendation ITU-T A.8 procedure. ii Rec. ITU-T J.460.2 (06/2008) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression Administration is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance with this Recommendation is voluntary. However, the Recommendation may contain certain mandatory provisions (to ensure e.g. interoperability or applicability) and compliance with the Recommendation is achieved when all of these mandatory provisions are met. The words shall or some other obligatory language such as must and the negative equivalents are used to express requirements. The use of such words does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementers are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2009 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T J.460.2 (06/2008) iii CONTENTS Page 1 Scope . 1 2 References. 1 2.1 Normative References. 1 2.2 Informative References . 2 2.3 Reference Acquisition. 2 3 Terms and Definitions. 2 4 Abbreviations, acronyms and conventions. 3 4.1 Abbreviations and Acronyms. 3 4.2 Conventions. 4 5 Overview . 4 5.1 IPCablecom2 Overview. 4 5.2 Service Goals. 4 5.3 IPCablecom2 Reference Architecture. 5 5.4 Embedded Digital Voice Adaptor. 5 6 E-DVA power requirements. 5 6.1 Power Considerations. 6 6.2 Typical E-DVA Traffic Model. 6 6.3 Service Requirements Under AC Fail Conditions. 6 6.4 Local Powering with Battery Backup. 6 7 E-DVA analog port requirements. 6 8 Client requirement. 6 8.1 Provisioning. 6 8.2 Security. 7 8.3 NAT/Firewall Traversal . 7 8.4 Codecs . 7 8.5 Loopback Test Capability. 8 9 E-DVA Monitoring requirements. 9 9.1 eCM Monitoring. 10 9.2 E-DVA Monitoring . 10 9.3 Battery-Backup Monitoring. 10 Appendix I Example of a power calculation. 12 I.1 Loop Start Signaling. 14 I.2 General Supervision . 15 I.3 General Ringing. 17 I.4 Voice Grade Analog Transmission . 18 1.5 Out of Service Requirements. 22 1.6 Message Waiting Indicator. 24 Rec. ITU-T J.460.2 (06/2008) 1 Recommendation ITU-T J.460.2 IPCablecom2 residential SIP telephony: embedded digital voice adapter (E-DVA) specification 1 Scope This Recommendation defines the embedded Digital Voice Adaptor (E-DVA) requirements for the analog interface and for powering of the