1、 International Telecommunication Union ITU-T J.199 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (11/2006) SERIES J: CABLE NETWORKS AND TRANSMISSION OF TELEVISION, SOUND PROGRAMME AND OTHER MULTIMEDIA SIGNALS Cable modems Battery backup for cable-based devices ITU-T Recommendation J.199 ITU-T Rec.
2、 J.199 (11/2006) i ITU-T Recommendation J.199 Battery backup for cable-based devices Summary This Recommendation describes the battery backup Uninterrupted Power Supply (UPS) and MIB requirements for integrated DOCSIS devices. An integrated DOCSIS device is a DOCSIS cable modem J.112, J.122 that has
3、 additional functionality (such as an IPCablecom MTA) integrated into it. Source ITU-T Recommendation J.199 was approved on 29 November 2006 by ITU-T Study Group 9 (2005-2008) under the ITU-T Recommendation A.8 procedure. ii ITU-T Rec. J.199 (11/2006) FOREWORD The International Telecommunication Uni
4、on (ITU) is the United Nations specialized agency in the field of telecommunications. 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 s
5、tandardizing 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 i
6、s 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
7、 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 ach
8、ieved 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. INTELLECTUA
9、L 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
10、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 cautio
11、ned 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 2007 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of IT
12、U. ITU-T Rec. J.199 (11/2006) iii CONTENTS Page 1 Scope 1 2 References. 1 2.1 Normative references 1 2.2 Informative references 1 3 Abbreviations and conventions. 1 3.1 Abbreviations. 1 3.2 Conventions 2 4 UPS MIB module and LED functionality 2 4.1 Introduction 2 4.2 UPS management. 3 Annex A Batter
13、y backup UPS MIB module. 5 ITU-T Rec. J.199 (11/2006) 1 ITU-T Recommendation J.199 Battery backup for cable-based devices 1 Scope This Recommendation describes the battery backup Uninterrupted Power Supply (UPS) and MIB requirements for integrated DOCSIS devices. An integrated DOCSIS device is a DOC
14、SIS cable modem J.112, J.122 that has additional functionality (such as an IPCablecom MTA) integrated into it. 2 References 2.1 Normative references The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this Recomm
15、endation. At the time of publication, the editions indicated were valid. All Recommendations and other references are subject to revision; users of this Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other referen
16、ces listed below. A list of the currently valid ITU-T Recommendations is regularly published. The reference to a document within this Recommendation does not give it, as a stand-alone document, the status of a Recommendation. SCTE 79-2 ANSI/SCTE 79-2 (2002), DOCSIS 2.0 Operations Support System Inte
17、rface. RFC 1628 IETF RFC 1628 (1994), UPS Management Information Base. 2.2 Informative references J.122 ITU-T Recommendation J.122 (2002), Second-generation transmission systems for interactive cable television services IP cable modems. J.126 ITU-T Recommendation J.126 (2004), Embedded Cable Modem d
18、evice specification. RFC 3410 IETF RFC 3410 (2002), Introduction and Applicability Statements for Internet Standard Management Framework. 3 Abbreviations and conventions 3.1 Abbreviations This Recommendation uses the following abbreviations and acronyms. DOCSIS Data-Over-Cable Service Interface Spec
19、ifications (See J.122.) eDOCSIS Embedded Data-Over-Cable Service Interface Specifications (See J.126.) LED Light-Emitting Diode MIB Management Information Base UPS Uninterrupted Power Supply 2 ITU-T Rec. J.199 (11/2006) 3.2 Conventions Throughout this Recommendation, the words that are used to defin
20、e the significance of particular requirements are capitalized. These words are: “MUST“ This word or the adjective “REQUIRED“ means that the item is an absolute requirement of this Recommendation. “MUST NOT“ This phrase means that the item is an absolute prohibition of this Recommendation. “SHOULD“ T
21、his word or the adjective “RECOMMENDED“ means that there may exist valid reasons in particular circumstances to ignore this item, but the full implications should be understood and the case carefully weighed before choosing a different course. “SHOULD NOT“ This phrase means that there may exist vali
22、d reasons in particular circumstances when the listed behaviour is acceptable or even useful, but the full implications should be understood and the case carefully weighed before implementing any behaviour described with this label. “MAY“ This word or the adjective “OPTIONAL“ means that this item is
23、 truly optional. One vendor may choose to include the item because a particular marketplace requires it or because it enhances the product, for example; another vendor may omit the same item. 4 UPS MIB module and LED functionality 4.1 Introduction Integrated DOCSIS devices MAY support battery backup
24、 capabilities with Uninterrupted Power Supply (UPS) functionality. An example of such device is an IPCablecom Embedded MTA eDOCSIS device. This Recommendation extends the set of MIB modules to provide SNMP management of the UPS power source and battery backup functions. Support for battery backup ca
25、pabilities with UPS functionality is becoming important as some broadband services rely on constant uptime. The integrated DOCSIS devices UPS components consist of one or more battery packs and associated management functions to allow the control of power supply inputs and outputs. When the UPS is b
26、eing provided power via the utility line (power outlet), the battery pack(s) are able to charge. When utility power is removed, the UPS component switches to the battery backup power source to provide power to the device until utility power has been reapplied or the battery pack(s) have been deplete
27、d. Integrated DOCSIS devices that include battery backup with UPS functionality MUST include a Battery LED that relays information on the status of the UPS and battery pack(s). For more information about the Battery LED requirements, refer to 4.2.2. ITU-T Rec. J.199 (11/2006) 3 Figure 1 describes th
28、e typical functional blocks of a UPS component connected to an eDOCSIS device. Figure 1/J.199 UPS components in eDOCSIS devices 4.2 UPS management The purpose of this clause is to define the UPS management requirements for integrated DOCSIS devices supporting battery backup UPS functionality. Integr
29、ated DOCSIS devices supporting battery backup functionality MUST support UPS management and MUST comply with the SNMP MIB requirements of IETF RFC 1628 as defined in this clause. IETF RFC 1628 contains more information than is required for the simple UPS devices used for IPCablecom VoIP or HSD servi
30、ces. This Recommendation defines an SMI compliance statement for IETF RFC 1628 that MUST be supported by integrated DOCSIS devices with UPS functionality. 4.2.1 Battery backup UPS MIB module requirements The battery backup UPS MIB objects MUST be implemented as defined in Annex A. 4.2.2 Power and ba
31、ttery LED requirements In order to have effective communication between the operators maintenance staff and the customers, it is necessary to have a standardized LED arrangement. The power and battery LED indicators should be implemented according to national practice. If there is no national practi
32、ce on this item, the requirements in the remainder of this clause MUST be implemented. Integrated DOCSIS devices with UPS functionality MUST provide a special LED labelled as “BATTERY“ (referred to as BATTERY LED or Battery LED in this Recommendation). The BATTERY LED conventions MUST comply with th
33、e requirements defined in Table 1. The “POWER“ LED of integrated DOCSIS devices with UPS functionality MUST also support the additional requirements defined in Table 1 when the device is running on battery backup power. The Power and Battery LED requirements and location on integrated DOCSIS devices
34、 with UPS functionality MUST be consistent with the requirements in Section 7 of the DOCSIS 2.0 OSSI specification. 4 ITU-T Rec. J.199 (11/2006) Table 1 defines the LED functionality used to relay power and battery status information: Table 1/J.199 Power and battery LED operations by state Mode of o
35、peration UPS power input source Battery status POWER LED requirements BATTERY LED requirements Unlit Lit Good battery Lit Lit Low battery Lit Flash Device initialization AC power (AC power is ON) Bad battery Lit Unlit Good battery Flash Unlit Low battery Flash Flash Normal operation Battery power (A
36、C power is OFF, battery input source is ON) Bad battery Unlit (see Note) Unlit NOTE During AC Power Fail with a bad battery, device operation may not be possible due to lack of battery power; the POWER and BATTERY LEDs may be Unlit. The Battery LED MUST be Lit under the following conditions: The Bat
37、tery LED MUST be Lit during the initialization of all the components attached to the UPS (the list of components or eSAFE devices attached to the UPS is defined by the upsIdentAttachedDevices object in the CLAB-UPS-MIB module). The Battery LED MUST be Lit if the eDOCSIS UPS is operating on AC power
38、and the battery is functioning normally. The Battery LED MUST be Unlit under the following conditions: One or more batteries are determined to be in “bad“ condition. A battery “bad“ condition occurs when one or more batteries have been determined to require replacement, for example when a battery is
39、 malfunctioning or may not be rechargeable. Such condition also triggers the upsAlarmBatteryBad alarm in the CLAB-UPS-MIB module. The UPS is operating on battery power and the battery is functioning normally. The Battery LED MUST Flash under the following condition: The Battery LED MUST Flash if the
40、 battery is low. A low battery condition is reached when the remaining battery run-time is less than or equal to the value of the upsConfigLowBattTime MIB object in the CLAB-UPS-MIB module (such condition also triggers the upsAlarmLowBattery alarm condition). 4.2.3 Applicability of the battery backu
41、p UPS MIB module requirements The battery backup and UPS functionality may be implemented in various Cable devices, for example an IPCablecom Embedded Multimedia Terminal Adapter (E-MTA), a standalone Cable Modem or any eDOCSIS device. This clause specifies additional applicability statements. 4.2.3
42、.1 IPCablecom E-MTA devices In the case of an IPCablecom Embedded Multimedia Terminal Adapter (E-MTA) device used to provide telephony services, service uptime is critical and the usage of battery backup UPS components may be an operator requirement. An IPCablecom E-MTA supporting battery backup UPS
43、 functionality MUST provide UPS output power to both the embedded cable modem (eCM) and the MTA eSAFE device (eMTA). Therefore, the upsIdentAttachedDevices object MUST contain the value ECM:EMTA (without the single quotes). ITU-T Rec. J.199 (11/2006) 5 Annex A Battery backup UPS MIB module CLAB-UPS-
44、MIB DEFINITIONS := BEGIN IMPORTS MODULE-IDENTITY FROM SNMPv2-SMI - RFC 2578 MODULE-COMPLIANCE FROM SNMPv2-CONF - RFC 2580 clabCommonMibs FROM CLAB-DEF-MIB upsIdentManufacturer, upsIdentModel, upsIdentAgentSoftwareVersion, upsIdentName, upsIdentAttachedDevices, upsBatteryStatus, upsSecondsOnBattery,
45、upsEstimatedMinutesRemaining, upsEstimatedChargeRemaining, upsInputLineBads, - optional upsInputNumLines, upsInputFrequency, - optional upsInputVoltage, - optional upsOutputSource, upsOutputFrequency, - optional upsOutputNumLines, upsOutputVoltage, - optional upsAlarmsPresent, upsAlarmDescr, upsAlar
46、mTime, upsShutdownType, upsShutdownAfterDelay, upsStartupAfterDelay, upsRebootWithDuration, upsAutoRestart, - optional upsConfigInputVoltage, - optional upsConfigInputFreq, - optional upsConfigOutputVoltage, - optional upsConfigOutputFreq, - optional upsConfigOutputVA, - optional upsConfigOutputPowe
47、r, - optional upsConfigLowBattTime, upsConfigAudibleStatus - optional FROM UPS-MIB; - RFC 1628 clabUpsMib MODULE-IDENTITY LAST-UPDATED “200501280000Z“ - January 28, 2005 ORGANIZATION “Cable Television Laboratories, Inc.“ CONTACT-INFO “Sumanth Channabasappa - CableLabs Postal: Cable Television Labora
48、tories, Inc 858 Coal Creek Circle Louisville, CO 80027 U.S.A. Phone: +1 303 661 9100 Fax: +1-303 661-9199 E-mail: 6 ITU-T Rec. J.199 (11/2006) Acknowledgements: Jean-Francois Mule CableLabs, Inc. Kevin Marez, Motorola, Inc.“ DESCRIPTION “This MIB module provides the management objects for the config
49、uration and monitoring of the battery backup see the module compliance statement - Conformance Statements clabUpsCompliances OBJECT IDENTIFIER := clabUpsConformance 1 clabUpsGroups OBJECT IDENTIFIER := clabUpsConformance 2 clabUpsMibCompliance MODULE-COMPLIANCE STATUS current DESCRIPTION “The compliance statement for Cable compliant devices that implement battery backup and UPS functionality.“ MODULE
