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Versions: 00                                                            
                                                           A. Valentine
Internet Draft                                           Hughes Network
                                                            Systems Ltd
Document: draft-ietf-ipcdn-dvbniuif-mib-00.txt            February 2001
Category: Standards Track


                         DVB NIU Interface MIB
                  for EuroModem compliant Cable Modems


Status of this Memo

   This document is an Internet-Draft and is in full conformance with
   all provisions of Section 10 of RFC2026.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF), its areas, and its working groups. Note that
   other groups may also distribute working documents as Internet-
   Drafts. Internet-Drafts are draft documents valid for a maximum of
   six months and may be updated, replaced, or obsoleted by other
   documents at any time. It is inappropriate to use Internet- Drafts
   as reference material or to cite them other than as "work in
   progress."

   The list of current Internet-Drafts can be accessed at
   http://www.ietf.org/ietf/1id-abstracts.txt

   The list of Internet-Draft Shadow Directories can be accessed at
   http://www.ietf.org/shadow.html.


Abstract

   This memo defines a portion of the Management Information Base (MIB)
   for use with network management protocols in the Internet community.
   In particular, it defines a basic set of managed objects for SNMP-
   based management of DVB interfaces in EuroModem v1.0 compliant Cable
   Network Interface Units.

   This memo specifies a MIB module in a manner that is compliant to
   the SNMP SMIv2[RFC2578][RFC2579][RFC2580].  The set of objects is
   consistent with the SNMP framework and existing SNMP standards.

   This memo is a product of the DVB/DAVIC interoperability consortium
   which has been adopted as a work item of the IPCDN WG.  Comments are
   solicited and should be addressed to the author.


1. The SNMP Management Framework

   The SNMP Management Framework presently consists of five major
   components:

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   o    An overall architecture, described in RFC 2571 [RFC2571].

   o    Mechanisms for describing and naming objects and events for the
        purpose of management. The first version of this Structure of
        Management Information (SMI) is called SMIv1 and described in
        STD 16, RFC 1155 [RFC1155], STD 16, RFC 1212 [RFC1212] and RFC
        1215 [RFC1215]. The second version, called SMIv2, is described
        in STD 58, RFC 2578 [RFC2578], STD 58, RFC 2579 [RFC2579] and
        STD 58, RFC 2580 [RFC2580].

   o    Message protocols for transferring management information. The
        first version of the SNMP message protocol is called SNMPv1 and
        described in STD 15, RFC 1157 [RFC1157]. A second version of
        the SNMP message protocol, which is not an Internet standards
        track protocol, is called SNMPv2c and described in RFC 1901
        [RFC1901] and RFC 1906 [RFC1906]. The third version of the
        message protocol is called SNMPv3 and described in RFC 1906
        [RFC1906], RFC 2572 [RFC2572] and RFC 2574 [RFC2574].

   o    Protocol operations for accessing management information. The
        first set of protocol operations and associated PDU formats is
        described in STD 15, RFC 1157 [RFC1157]. A second set of
        protocol operations and associated PDU formats is described in
        RFC 1905 [RFC1905].

   o    A set of fundamental applications described in RFC 2573
        [RFC2573] and the view-based access control mechanism described
        in RFC 2575 [RFC2575].

   A more detailed introduction to the current SNMP Management
   Framework can be found in RFC 2570 [RFC2570].

   Managed objects are accessed via a virtual information store, termed
   the Management Information Base or MIB. Objects in the MIB are
   defined using the mechanisms defined in the SMI.

   This memo specifies a MIB module that is compliant to the SMIv2. A
   MIB conforming to the SMIv1 can be produced through the appropriate
   translations. The resulting translated MIB must be semantically
   equivalent, except where objects or events are omitted because no
   translation is possible (use of Counter64). Some machine readable
   information in SMIv2 will be converted into textual descriptions in
   SMIv1 during the translation process. However, this loss of machine
   readable information is not considered to change the semantics of
   the MIB.


2. Glossary

   2.1. CATV

   Originally "Community Antenna Television", now used to refer to any

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   cable or hybrid fiber and cable system used to deliver video signals
   to a community.

   2.2. DAVIC

   Digital Audiovisual Council. International council for
   internetworking audio and video systems.

   2.3. Downstream

   The direction from the head-end towards the subscriber.

   2.4. DVB

   Digital Video Broadcasting. The DVB projects produce open and
   interoperable global standards for digital audio and video
   distribution.

   2.5. EuroModem.

   EuroModem.  A specification for an interoperable European Cable
   Modem [EUROM].

   2.6. Head-end

   The origination point in most cable systems of the subscriber video
   signals. Generally also the location of the INA equipment.

   2.7. INA

   Interactive Network Adapter.  This can act as a bridge or router in
   the cable head-end. It is responsible for controlling the bandwidth
   available to each NIU.

   2.8. NIU

   Network Interface Unit.  The unit is located at the subscriber
   premises and provides interactive services via the cable network.
   The NIU is under the control of the INA, but may request additional
   bandwidth/connections when required.  The NIU can act as a bridge or
   router.

   2.9.  QPSK   Quadrature Phase Shift Keying.

   A particular modulation scheme on an RF medium. See [19].

   2.10.  QAM   Quadrature Amplitude Modulation.

   A particular modulation scheme on on RF medium.  Usually expressed
   with a number indicating the size of the modulation constellation
   (e.g. 16 QAM).

   2.11. RF

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   Radio Frequency.

   2.12. Upstream

   The direction from the subscriber towards the head-end.


3. Overview

   This MIB provides a set of objects required for the management of
   Euromodem compliant DVB interfaces.  The specification is derived in
   part from the parameters and protocols described in the Technical
   Specification of a European Cable Modem for digital bi-directional
   communications via cable networks [EUROM].

   3.1.  Structure of the MIB

   This MIB is structured as three main groups:

   o    Management information pertinent to the MAC layer
        (dvbNiuMacObjects).  This group is further subdivided into a
        capabilities group (dvbNiuMacCap) and statistics group
        (dvbNiuMacStats).

   o    Management information pertinent to RF downstream
        (dvbNiuDsRfObjects).

   o    Management information pertinent to RF upstream
        (dvbNiuUsRfObjects).

   The tables contained in each group can be considered extensions to
   the ifEntry.

   3.1.1.  dvbNiuMacObjects

   dvbNiuMacCapTable - This table describes which MAC capabilities are
   supported by the NIU.

   DvbNiuMacStatsTable - This table is used to monitor the status and
   collect statistics for the MAC layer.

   3.1.2.  dvbNiuDsRfObjects

   dvbNiuRfDsTable - This table is used to describe the RF downstream
   and allows configuration of downstream channel scanning.

   3.1.3.  dvbNiuUsRfObjects

   dvbNiuRfUsTable - This table is used to describe the RF upstream.

   3.2.  Relationship to the Interfaces MIB


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   This section clarifies the relationship of this MIB to the
   Interfaces MIB [RFC2863].  Several areas of correlation are
   addressed in the following subsections.  The implementer is referred
   to the Interfaces MIB document in order to understand the general
   intent of these areas.

   3.2.1.  Layering Model

   An instance of ifEntry exists for each RF Downstream interface, for
   each RF Upstream interface, and for each RF MAC layer.  The
   ifStackTable [RFC2863] MUST be implemented to identify relationships
   among sub-interfaces.

   The following example illustrates a MAC interface with one
   downstream and two upstream channels.

                                  | <== to network layer
                    +-------------+--------------+
                    |           RF MAC           |
                    +----+---------+-----------+-+
                         |         |           |
               +---------+---+ +---+-------+ +-+---------+
               | Downstream1 | | Upstream1 | | Upstream2 |
               +-------------+ +-----------+ +-----------+

   As can be seen from this example, the RF MAC interface is layered on
   top of the downstream and upstream interfaces.

   In this example, the assignment of index values could be as follows:

         ifIndex ifType                   Description

         1    dvbRccMacLayer(146)   DVB CATV MAC Layer
         2    dvbRccDownstream(147) DVB CATV Downstream interface
         3    dvbRccUpstream(148)   DVB CATV Upstream interface
         4    dvbRccUpstream(148)   DVB CATV Upstream interface

         The corresponding ifStack entries would then be:

              | IfStackHigherLayer | ifStackLowerLayer |
              |         0          |         1         |
              |         1          |         2         |
              |         1          |         3         |
              |         1          |         4         |
              |         2          |         0         |
              |         3          |         0         |
              |         4          |         0         |

   3.2.2.  Virtual Circuits

   The DVB MAC layer supports the concept of virtual circuits, but
   these do not have entries in the ifTable.


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   3.2.3.  ifTestTable

   The ifTestTable is not supported by this MIB.

   3.2.4.  ifRcvAddressTable

   The ifRcvAddressTable is supported by this MIB only for the MAC
   Layer interface.

   3.2.5.  ifEntry

   This section documents only the differences from the requirements
   specified in the Interfaces MIB.  See that MIB for columns omitted
   from the descriptions below.

   3.2.5.1.  ifEntry for Downstream interfaces

   The ifEntry for Downstream interfaces supports the
   ifGeneralInformationGroup and the ifPacketGroup of the Interfaces
   MIB.  This is an input only interface at the NIU and all output
   status counters - ifOut* - will return zero.

   3.2.5.1.1.  ifEntry for Downstream interfaces in Cable Modems

   ifTable           Comments
   ==============    ===========================================
   ifIndex           Each RF Cable Downstream interface is represented
                     by an ifEntry.

   ifType            The IANA value of dvbRccDownstream(147).

   ifSpeed           Return the speed of this downstream channel.
                     The returned value the raw bandwidth in bits/s
                     of this interface. This is the symbol rate
                     multiplied with the number of bits per symbol.

   ifPhysAddress     Return an empty string.

   ifAdminStatus     The administrative status of this interface.

   ifOperStatus      The current operational status of this interface.

   ifMtu             The size of the largest frame which can be
                     received from this interface, specified in octets.
                     The value includes the length of the MAC header.

   ifInOctets        The total number of octets received on this
                     interface. This includes data packets as well as
                     MAC layer packets, and includes the length of the
                     MAC header.


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   ifInUcastPkts     The number of Unicast packets received on this
                     interface. This includes data packets as well as
                     MAC layer packets.

   ifInMulticastPkts Return the number of Multicast packets received
                     on this interface. This includes data packets as
                     well as MAC layer packets.

   ifInBroadcastPkts Return the number of Broadcast packets received
                     on this interface. This includes data packets
                     as well as MAC layer packets.

   ifInDiscards      The total number of received packets which have
                     been discarded.
                     The possible reasons are: buffer shortage.

   ifInErrors        The number of inbound packets that contained
                     errors preventing them from being deliverable
                     to higher layers.

                     Possible reasons are: MAC FCS error.

   ifInUnknownProtos The number of frames with an unknown packet type.
                     These are MAC frames with an unknown packet type.

   ifOutOctets       Return zero.

   ifOutUcastPkts    Return zero.

   ifOutMulticastPkts
                     Return zero.

   ifOutBroadcastPkts
                     Return zero.

   ifOutDiscards     Return zero.

   ifOutErrors       Return zero.

   ifPromiscuousMode Refer to the Interfaces MIB.

   3.2.5.2.  ifEntry for Upstream interfaces

   The ifEntry for Upstream interfaces supports the
   ifGeneralInformationGroup and the ifPacketGroup of the Interfaces
   MIB.  This is an output only interface at the NIU and all input
   status counters - ifIn* - will return zero.

   3.2.5.2.1.  ifEntry for Upstream interfaces in NIUs

   ifTable           Comments
   ==============    ===========================================
   ifIndex           Each RF Cable Upstream interface is represented

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                     by an ifEntry.

   ifType            The IANA value of dvbRccUpstream(148).

   ifSpeed           Return the speed of this upstream channel.
                     The returned value is the raw bandwidth
                     in bits/s of this interface, regarding the
                     highest speed modulation profile that is
                     defined. This is the symbol rate multiplied
                     with the number of bits per symbol for this
                     modulation profile.

   ifPhysAddress     Return an empty string.

   ifAdminStatus     The administrative status of this interface.

   ifOperStatus      The current operational status of this
                     interface.

   ifMtu             The size of the largest frame which can be
                     transmitted on this interface, specified in
                     octets.
                     The value includes the length of the MAC
                     header.

   ifInOctets        Return zero.

   ifInUcastPkts     Return zero.

   ifInMulticastPkts Return zero.

   ifInBroadcastPkts Return zero.

   ifInDiscards      Return zero.

   ifInErrors        Return zero.

   ifInUnknownProtos Return zero.

   ifOutOctets       The total number of octets transmitted on this
                     interface. This includes MAC packets as well as
                     data packets, and includes the length of the
                     MAC header.

   ifOutUcastPkts    The number of Unicast packets transmitted on this
                     interface. This includes MAC packets as well as
                     data packets.

   ifOutMulticastPkts
                     Return the number of Multicast packets transmitted
                     on this interface.
                     This includes MAC packets as well as data packets.


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   ifOutBroadcastPkts
                     Return the number of broadcast packets transmitted
                     on this interface.
                     This includes MAC packets as well as data packets.

   ifOutDiscards     The total number of outbound packets which
                     were discarded. Possible reasons are:
                     buffer shortage.

   ifOutErrors       The number of packets which could not be
                     transmitted due to errors.

   ifPromiscuousMode Return false.

   3.2.5.3.  ifEntry for the MAC Layer

   The ifEntry for the MAC Layer supports the ifGeneralInformationGroup
   and the ifPacketGroup of the Interfaces MIB.  This interface
   provides an aggregate view of status for the lower level Downstream
   and Upstream interfaces.

   ifTable           Comments
   ==============    ===========================================
   ifIndex           Each RF Cable MAC layer entity is represented
                     by an ifEntry.

   ifType            The IANA value of dvbRccMacLayer(146).

   ifSpeed           Return zero.

   ifPhysAddress     Return the physical address of this interface.

   ifAdminStatus     The administrative status of this interface.

   ifOperStatus      The current operational status of the MAC
                     layer interface.

   ifHighSpeed       Return zero.

   ifMtu             Return 1500.

   ifInOctets        The total number of data octets received on this
                     interface, targeted for upper protocol layers.

   ifInUcastPkts     The number of Unicast packets received on this
                     interface, targeted for upper protocol layers.

   ifInMulticastPkts Return the number of Multicast packets received
                     on this interface, targeted for upper protocol
                     layers.

   ifInBroadcastPkts Return the number of Broadcast packets received
                     on this interface, targeted for upper protocol

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                     layers.

   ifInDiscards      The total number of received packets which have
                     been discarded.
                     The possible reasons are: buffer shortage.

   ifInErrors        The number of inbound packets that contained
                     errors preventing them from being deliverable
                     to higher layers.
                     Possible reasons are: data packet FCS error,
                     invalid MAC header.

   ifInUnknownProtos The number of frames with an unknown packet type.
                     This is the number of data packets targeted for
                     upper protocol layers with an unknown packet type.

   ifOutOctets       The total number of octets, received from upper
                     protocol layers and transmitted on this interface.

   ifOutUcastPkts    The number of Unicast packets, received from upper
                     protocol layers and transmitted on this interface.

   ifOutMulticastPkts
                     Return the number of Multicast packets received
                     from upper protocol layers and transmitted on this
                     interface.

   ifOutBroadcastPkts
                     Return the number of broadcast packets received
                     from upper protocol layers and transmitted on this
                     interface.

   ifOutDiscards     The total number of outbound packets which
                     were discarded. Possible reasons are:
                     buffer shortage.

   ifOutErrors       The number of packets which could not be
                     transmitted due to errors.

   ifPromiscuousMode Refer to the Interfaces MIB.


4. Definitions


   DVB-CABLE-NIU-IF-MIB DEFINITIONS ::= BEGIN


   IMPORTS
       MODULE-IDENTITY,
       OBJECT-TYPE,
       Counter32,
       Integer32,

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       Gauge32,
       transmission
           FROM SNMPv2-SMI
       TruthValue,
           FROM SNMPv2-TC
       SnmpAdminString
           FROM SNMP-FRAMEWORK-MIB
       OBJECT-GROUP,
       MODULE-COMPLIANCE
           FROM SNMPv2-CONF
       ifIndex
           FROM IF-MIB;

   dvbNiuIf MODULE-IDENTITY
       LAST-UPDATED    "9912030000Z"
       ORGANIZATION    "IETF IPCDN Working Group
                        DVB/DAVIC Interoperability Consortium Technical
                        Working Group"
       CONTACT-INFO
              "        Andrew Valentine
               Postal: Engineering Design Centre
                       Hughes Network Systems Ltd
                       Saxon Street,
                       Linford Wood,
                       Milton Keynes.
                       MK14 6LD
                       ENGLAND

                  Tel: +44 1908 221122
                  Fax: +44 1908 221127
               E-mail: a.valentine@eu.hns.com

               IETF IPCDN Working Group
               General Discussion: ipcdn@ietf.org
               Subscribe: http://www.ietf.org/mailman/listinfo/ipcdn
               Archive: ftp://ftp.ietf.org/ietf-mail-archive/ipcdn
               Co-chairs: Richard Woundy, rwoundy@cisco.com
                          Andrew Valentine, a.valentine@eu.hns.com"

       DESCRIPTION     "The information module for the DVB interfaces
                        found in an EuroModem."

       REVISION        "9912030000Z"
       DESCRIPTION     "The mib has been modified to incorporate the
                        MAC states from dvbNiuOperStatus.  These are
                        in dvbNiuMacStatStatus.  The compliance
                        section has been fixed."


       REVISION        "9910010000Z"
       DESCRIPTION     "The mib has been modified to incorporate the
                        comments made by the WGT during the
                        27/28 Sep 1999 meeting.  The main areas

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                        affected are dvbNiuMacStatsTable and
                        dvbNiuDsRfObjects"

       REVISION        "9907281500Z"
       DESCRIPTION     "The initial version of the MIB"
   ::= {transmission xx}


   dvbNiuMacObjects   OBJECT IDENTIFIER ::= {dvbNiuIf 1}
   dvbNiuDsRfObjects  OBJECT IDENTIFIER ::= {dvbNiuIf 2}
   dvbNiuUsRfObjects  OBJECT IDENTIFIER ::= {dvbNiuIf 3}
   dvbNiuDvbIfConform OBJECT IDENTIFIER ::= {dvbNiuIf 4}

   -- Define groups under dvbNiuMacObjects
   dvbNiuMacCap     OBJECT IDENTIFIER ::= {dvbNiuMacObjects 1}
   dvbNiuMacStats   OBJECT IDENTIFIER ::= {dvbNiuMacObjects 2}

   -- Define groups under dvbNiuDsRfObjects
   dvbNiuDsRfParam  OBJECT IDENTIFIER ::= {dvbNiuDsRfObjects 1}

   -- Define groups under dvbNiuUsRfObjects
   dvbNiuUsRfParam  OBJECT IDENTIFIER ::= {dvbNiuUsRfObjects 1}

   --Define identifiers under dvbNiuDvbIfConform
   dvbNiuIfCompliances  OBJECT IDENTIFIER ::= {dvbNiuDvbIfConform 1}
   dvbNiuIfGroups       OBJECT IDENTIFIER ::= {dvbNiuDvbIfConform 2}


   -- Definition of MIB objects

   -- ===============================================================
   -- =  Mac Capabilities Group                                     =
   -- ===============================================================

   -- MAC Capabilities table

   dvbNiuMacCapTable OBJECT-TYPE
       SYNTAX      SEQUENCE OF DvbNiuMacCapEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "This table contains all available MAC capabilites specified
            in ETS 300 800 (8/3/1999) and identifies whether they are
            supported on the MAC interface."
   ::= { dvbNiuMacCap 1 }

   dvbNiuMacCapEntry OBJECT-TYPE
       SYNTAX      DvbNiuMacCapEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "A row provides the supported capabilities for a single MAC
            interface.  An entry in this table exists for each ifEntry

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            with an ifType of dvbRccMacLayer."
       INDEX { ifIndex }
   ::= { dvbNiuMacCapTable 1 }

   DvbNiuMacCapEntry ::= SEQUENCE {
       dvbNiuMacCapVer          INTEGER,
       dvbNiuMacCapEncap        BITS,
       dvbNiuMacCapResReqCap    TruthValue,
       dvbNiuMacCapFragMacMess  TruthValue,
       dvbNiuMacCapSecSupp      TruthValue,
       dvbNiuMacCapMinislots    TruthValue,
       dvbNiuMacCapIbSig        TruthValue,
       dvbNiuMacCapOobSig       TruthValue,
       dvbNiuMacCapDsOobBr      BITS,
       dvbNiuMacCapUsBr         BITS,
       dvbNiuMacCapMaxConn      Gauge32,
       dvbNiuMacCapOperation    INTEGER
   }

   dvbNiuMacCapVer OBJECT-TYPE
       SYNTAX      INTEGER {
                       davic11(1),
                       davic12(2),
                       en301199(20),
                       ets300800v2(29),
                       ets300800v1(30)
                   }
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "The mac protocol version."
   ::= { dvbNiuMacCapEntry 1 }

   dvbNiuMacCapEncap OBJECT-TYPE
       SYNTAX      BITS {
                       directIp(0),
                       ethernetMacBridge(1),
                       ppp(2)
                   }
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "This field is used to identify the encapsulation
            types supported.  These can be direct IP, Ethernet MAC
            bridging and PPP."
   ::= { dvbNiuMacCapEntry 2 }


   dvbNiuMacCapResReqCap OBJECT-TYPE
       SYNTAX      TruthValue
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION

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           "True if the NIU is able to send MAC Resource Request
            Messages."
   ::= { dvbNiuMacCapEntry 3 }

   dvbNiuMacCapFragMacMess OBJECT-TYPE
       SYNTAX      TruthValue
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "True if the NIU supports fragemented MAC messages."
   ::= { dvbNiuMacCapEntry 4 }

   dvbNiuMacCapSecSupp OBJECT-TYPE
       SYNTAX      TruthValue
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "True if the NIU supports the security extensions defined
            in ETS 300 800."
   ::= { dvbNiuMacCapEntry 5 }

   dvbNiuMacCapMinislots OBJECT-TYPE
       SYNTAX      TruthValue
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "True if the NIU is capable of utilising minislots."
   ::= { dvbNiuMacCapEntry 6 }

   dvbNiuMacCapIbSig OBJECT-TYPE
       SYNTAX      TruthValue
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "True if the NIU is capable of utilising in band
            signalling."
   ::= { dvbNiuMacCapEntry 7 }

   dvbNiuMacCapOobSig OBJECT-TYPE
       SYNTAX      TruthValue
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "True if the NIU is capable of utilising out of band
            signalling."
   ::= { dvbNiuMacCapEntry 8 }

   dvbNiuMacCapDsOobBr OBJECT-TYPE
       SYNTAX      BITS {
                       d1o544Mbit(0),
                       d3o088Mbit(1)
                   }
       MAX-ACCESS  read-only

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       STATUS      current
       DESCRIPTION
           "This field is used to identify the downstream out of band
            bit rates supported. These are 1.544Mbit/s and 3.088Mbit/s.
            If dvbNiuMacCapOobSig is false then the value of this
            Object will be zero."
   ::= { dvbNiuMacCapEntry 9 }

   dvbNiuMacCapUsBr OBJECT-TYPE
       SYNTAX      BITS {
                       u256kbit(0),
                       u1o544Mbit(1),
                       u3o88Mbit(2),
                       u6o176Mbit(3)
                   }
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "This field is used to identify the upstream bit rates
            supported.  These are 256kbit/s, 1.544Mbit/s, 3.088Mbit/s
            and 6.176Mbit/s."
   ::= { dvbNiuMacCapEntry 10 }

   dvbNiuMacCapMaxConn OBJECT-TYPE
       SYNTAX      Gauge32
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "The maximum number of connections supported by the NIU."
   ::= { dvbNiuMacCapEntry 11 }

   dvbNiuMacCapOperation OBJECT-TYPE
       SYNTAX      INTEGER {
                       one-way(1),
                       two-way(2)
                   }
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "The operational mode of the NIU, this can be either
            one-way or two-way."
   ::= { dvbNiuMacCapEntry 12 }

   -- End of MAC capabilities table

   -- ===============================================================
   -- =  Mac Statistics Group                                       =
   -- ===============================================================

   -- MAC Statistics table

   dvbNiuMacStatsTable OBJECT-TYPE
       SYNTAX      SEQUENCE OF DvbNiuMacStatsEntry

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       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "This table contains statistics/status associated with the
            MAC interface.  Reading these statistics does not cause
            the values to be reset.  If the statistics are read via a
            MAC message they will be reset!

            Note: The error statistics are represented by only 16 bits,
            this is because the status message only uses 16 bits for
            the values."
   ::= { dvbNiuMacStats 1 }

   dvbNiuMacStatsEntry OBJECT-TYPE
       SYNTAX      DvbNiuMacStatsEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "A row provides the statistics/status for a single MAC
            interface.  An entry in this table exists for each ifEntry
            with an ifType of dvbRccMacLayer."
       INDEX { ifIndex }
   ::= { dvbNiuMacStatsTable 1 }

   DvbNiuMacStatsEntry ::= SEQUENCE {
       dvbNiuMacHwVer                SnmpAdminString,
       dvbNiuMacStatStatus           INTEGER,
       dvbNiuMacStatSlotCfgCrcErrs   Gauge32,
       dvbNiuMacStatRsCorrErrs       Gauge32,
       dvbNiuMacStatATMPacketLosses  Gauge32,
       dvbNiuMacStatSlotConfigCount  Gauge32,
       dvbNiuMacStatSlEsfCrcErrs     Gauge32,
       dvbNiuMacStatRsErrCorrFrms    Gauge32,
       dvbNiuMacStatRsErrNonCorrFrms Gauge32,
       dvbNiuMacStatSlEsfFrameCount  Gauge32,
       dvbNiuMacStatConCount         Gauge32,
   }

   dvbNiuMacHwVer OBJECT-TYPE
       SYNTAX      SnmpAdminString
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "The hardware version of the MAC interface.  The is a free
            format text field."
   ::= { dvbNiuMacStatsEntry 1 }

   dvbNiuMacStatStatus OBJECT-TYPE
       SYNTAX      INTEGER {
                       scanningForCarrier(1),
                       provisioning(2),
                       invalidSTBNIU(3),
                       timingRangingError(4),

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                       powerRangingError(5),
                       running(6),
                       stopped(7),
                       none(8),
                       other(9)
                   }
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "The operational status of the NIU.  The statuses 1-8 are
            from ETS 300 800.  The status other(9) is used for any case
            that is not explicitly identified"
   ::= { dvbNiuMacStatsEntry 2 }

   dvbNiuMacStatSlotCfgCrcErrs OBJECT-TYPE
       SYNTAX      Gauge32 (0..65535)
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "Counts the number of errors in Slot_Configuration_Count
            R bytes, as found by the CRC decoder.  This object is
            initialized to 0 at boot and is reset only upon reboot or
            by a MAC Status message."
   ::= { dvbNiuMacStatsEntry 3 }

   dvbNiuMacStatRsCorrErrs OBJECT-TYPE
       SYNTAX      Gauge32 (0..65535)
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "Counts the number of errors as corrected by the Reed
            Solomon decoder.  This object is initialized to 0 at boot
            and is reset only upon reboot or by a MAC Status message."
   ::= { dvbNiuMacStatsEntry 4 }

   dvbNiuMacStatATMPacketLosses OBJECT-TYPE
       SYNTAX      Gauge32 (0..65535)
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "Counts the number of received ATM cells that were lost,
            either due to unrecoverable Reed Solomon errors or because
            of an erroneous HEC of the ATM cells header.  This object
            is initialized to 0 at boot and is reset only upon reboot
            or by a MAC Status message."
   ::= { dvbNiuMacStatsEntry 5 }

   dvbNiuMacStatSlotConfigCount OBJECT-TYPE
       SYNTAX      Gauge32 (0..65535)
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "This refers to the number of R-byte sets (Rxa-Rxc) used to

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            calculate Slot_Configuration_CRC_Error_Count."
   ::= { dvbNiuMacStatsEntry 6 }

   dvbNiuMacStatSlEsfCrcErrs OBJECT-TYPE
       SYNTAX      Gauge32 (0..65535)
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "Counts the number of CRC errrors found in consecutive
            C1-C6.
            This object is initialized to 0 at boot and is reset only
            upon reboot or by a MAC Status message."
   ::= { dvbNiuMacStatsEntry 7 }

   dvbNiuMacStatRsErrCorrFrms OBJECT-TYPE
       SYNTAX      Gauge32 (0..65535)
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "Counts the number of MPEG frames received with correctable
            Reed Solomon errors (IB only).  This object is initialized
            to 0 at boot and is reset only upon reboot or by a MAC
            Status message."
   ::= { dvbNiuMacStatsEntry 8 }

   dvbNiuMacStatRsErrNonCorrFrms OBJECT-TYPE
       SYNTAX      Gauge32 (0..65535)
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "Counts the number of MPEG frames received with non
            correctable Reed Solomon errors (IB only).  This object is
            initialized to 0 at boot and is reset only upon reboot or
            by a MAC Status message."
   ::= { dvbNiuMacStatsEntry 9 }

   dvbNiuMacStatSlEsfFrameCount OBJECT-TYPE
       SYNTAX      Gauge32 (0..65535)
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "This is the number of frames the statistics in this message
            apply on."
   ::= { dvbNiuMacStatsEntry 10 }

   dvbNiuMacStatConCount OBJECT-TYPE
       SYNTAX      Gauge32
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "The number of active connections."
   ::= { dvbNiuMacStatsEntry 11 }


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   -- End of MAC statistics table

   -- ===============================================================
   -- =  Downstream RF Parameters Group                             =
   -- ===============================================================

   -- Downstream RF parameters table

   dvbNiuRfDsTable OBJECT-TYPE
       SYNTAX      SEQUENCE OF DvbNiuRfDsEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "This table contains RF characteristcs and counters for the
            downstream interfaces.  "
   ::= { dvbNiuDsRfParam 1 }

   dvbNiuRfDsEntry OBJECT-TYPE
       SYNTAX      DvbNiuRfDsEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "A row provides the RF characteristcs, counters and possible
            frequencies to use when locating a downstream channel for a
            single downstream RF interface.  An entry in this
            table exists for each ifEntry with an ifType of
            dvbRccDownstream"
       INDEX { ifIndex }
   ::= { dvbNiuRfDsTable 1 }

   DvbNiuRfDsEntry ::= SEQUENCE {
       dvbNiuRfDsHwVer        SnmpAdminString,
       dvbNiuRfDsLastGoodFreq Integer32,
       dvbNiuRfDsBackupFreq   Integer32,
       dvbNiuRfDsLowScanFreq  Integer32,
       dvbNiuRfDsHighScanFreq Integer32,
       dvbNiuRfDsScanStep     Integer32,
       dvbNiuRfDsOobFreq      Integer32,
       dvbNiuRfDsIbFreq       Integer32,
       dvbNiuRfDsModType      INTEGER,
       dvbNiuRfDsSnrEst       Integer32,
       dvbNiuRfDsPwrLevelEst  Integer32
   }

   dvbNiuRfDsHwVer OBJECT-TYPE
       SYNTAX      SnmpAdminString
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "The hardware version of the downstream RF interface.  The
            is a free format text field."
   ::= { dvbNiuRfDsEntry 1 }


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   dvbNiuRfDsLastGoodFreq OBJECT-TYPE
       SYNTAX      Integer32 (47000000..1000000000)
       UNITS       "Hz"
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "This is the last known good frequency for a downstream
            channel and is used to locate the channel on power up or
            reset.  If a downstream channel cannot be found at the
            frequency held by this object then dvbNiuRfDsBackupFreq
            is tried.  If dvbNiuRfDsBackupFreq fails then a frequency
            scan is performed between dvbNiuRfDsMinScanFreq and
            dvbNiuRfDsMaxScanFreq with a step size of
            dvbNiuRfDsScanStep
            This object will be updated with the freguency of the
            channel found using the alternative frequencies."
       DEFVAL      { 650000000 }
   ::= { dvbNiuRfDsEntry 2 }

   dvbNiuRfDsBackupFreq OBJECT-TYPE
       SYNTAX      Integer32 (47000000..1000000000)
       UNITS       "Hz"
       MAX-ACCESS  read-write
       STATUS      current
       DESCRIPTION
           "This is a backup frequency for the downstream channel.
            This will be used if dvbNiuRfDsLastGoodFreq fails.  If this
            frequency is successfully used then dvbNiuRfDsLastGoodFreq
            is updated to contain it.  If dvbNiuRfDsBackupFreq fails
            then a frequency scan is performed between
            dvbNiuRfDsMinScanFreq and dvbNiuRfDsMaxScanFreq with a step
            size of dvbNiuRfDsScanStep."
       DEFVAL      { 450000000 }
   ::= { dvbNiuRfDsEntry 3 }

   dvbNiuRfDsLowScanFreq OBJECT-TYPE
       SYNTAX      Integer32 (47000000..1000000000)
       UNITS       "Hz"
       MAX-ACCESS  read-write
       STATUS      current
       DESCRIPTION
           "This is the start of the frequency range to be used
            for scanning to find a downstream channel. If a downstream
            channel is found then dvbNiuRfDsLastGoodFreq is updated to
            contain the new frequency and the scan is terminated.
            The step size used for the scan is dvbNiuRfDsScanStep."
       DEFVAL      { 110000000 }
   ::= { dvbNiuRfDsEntry 4 }

   dvbNiuRfDsHighScanFreq OBJECT-TYPE
       SYNTAX      Integer32 (47000000..1000000000)
       UNITS       "Hz"
       MAX-ACCESS  read-write

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       STATUS      current
       DESCRIPTION
           "This is the end of the frequency range to be used for
            scanningscan to find a downstream channel.  If a downstream
            channel is found then dvbNiuRfDsLastGoodFreq is updated to
            contain the new frequency and the scan is terminated.
            The step size used for the scan is dvbNiuRfDsScanStep."
       DEFVAL      { 862000000 }
   ::= { dvbNiuRfDsEntry 5 }

   dvbNiuRfDsScanStep OBJECT-TYPE
       SYNTAX      Integer32 (47000000..1000000000)
       UNITS       "Hz"
       MAX-ACCESS  read-write
       STATUS      current
       DESCRIPTION
           "This is the step size to be used when scanning for a
            downstream channel."
       DEFVAL      { 62500 }
   ::= { dvbNiuRfDsEntry 6 }


   dvbNiuRfDsOobFreq OBJECT-TYPE
       SYNTAX      Integer32 (47000000..1000000000)
       UNITS       "Hz"
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "The frequency of the current downstream out of band
   channel."
   ::= { dvbNiuRfDsEntry 7 }

   dvbNiuRfDsIbFreq OBJECT-TYPE
       SYNTAX      Integer32 (47000000..1000000000)
       UNITS       "Hz"
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "The frequency of the current downstream in band channel."
   ::= { dvbNiuRfDsEntry 8 }


   dvbNiuRfDsModType OBJECT-TYPE
       SYNTAX INTEGER {
           qpsk(2),
           qam8(3),
           qam16(4),
           qam32(5),
           qam64(6),
           qam128(7),
           qam256(8)
       }
       MAX-ACCESS  read-only

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       STATUS      current
       DESCRIPTION
           "The modulation type of the downstream channel."
   ::= { dvbNiuRfDsEntry 9 }

   dvbNiuRfDsSnrEst OBJECT-TYPE
       SYNTAX      Integer32 (0..255)
       UNITS       "dB*2"
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "The estimated signal to noise ratio of the downstream
            carrying MAC messages.  If the SNR cannot be estinmated
            it will be 0."
   ::= { dvbNiuRfDsEntry 10 }

   dvbNiuRfDsPwrLevelEst OBJECT-TYPE
       SYNTAX      Integer32 (0..255)
       UNITS       "dBuV*2"
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "The estimated power level of the downstream carrying
            MAC messages.  If the power level cannot be estinmated
            it will be 0."
   ::= { dvbNiuRfDsEntry 11 }

   -- End of downstream parameters table

   -- ===============================================================
   -- =  Upstream RF Parameters Group                               =
   -- ===============================================================

   -- Upstream RF parameters table

   dvbNiuRfUsTable OBJECT-TYPE
       SYNTAX      SEQUENCE OF DvbNiuRfUsEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "This table contains RF characteristcs and counters for the
            upstream interfaces."
   ::= { dvbNiuUsRfParam 1 }

   dvbNiuRfUsEntry OBJECT-TYPE
       SYNTAX      DvbNiuRfUsEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "A row provides the RF characteristcs and counters for a
            single upstream RF interface.  An entry in this table
            exists for each ifEntry with an ifType of dvbRccUpstream"
       INDEX { ifIndex }

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   ::= { dvbNiuRfUsTable 1 }

   DvbNiuRfUsEntry ::= SEQUENCE {
       dvbNiuRfUsHwVer           SnmpAdminString,
       dvbNiuRfUsFreq            Integer32,
       dvbNiuRfUsPwrCtrlSetting  Integer32,
       dvbNiuRfUsTimeOffsetValue Integer32
   }

   dvbNiuRfUsHwVer OBJECT-TYPE
       SYNTAX      SnmpAdminString
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "The hardware version of the upstream RF interface.  The
            is a free format text field."
   ::= { dvbNiuRfUsEntry 1 }

   dvbNiuRfUsFreq OBJECT-TYPE
       SYNTAX      Integer32 (5000000..65000000)
       UNITS       "Hz"
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "The frequency of the upstream channel."
   ::= { dvbNiuRfUsEntry 2 }

   dvbNiuRfUsPwrCtrlSetting OBJECT-TYPE
       SYNTAX      Integer32 (0..255)
       UNITS       "dBuV*2"
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "The actual power used for the upstream transmission.  The
            unit of measure is 0.5dBuV"
   ::= { dvbNiuRfUsEntry 3 }

   dvbNiuRfUsTimeOffsetValue OBJECT-TYPE
       SYNTAX      Integer32 (-32768..32767)
       UNITS       "100nsec"
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "This represents a relative offset of the upstream
            transmission timing.  A negative value indicates an
            adjustment forward in time.  A positive value indicates
            an adjustment back in time.  The unit of measure is 100
            nsec"
   ::= { dvbNiuRfUsEntry 4 }

   -- End of upstream parameters table

   -- Conformance statements

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   dvbNiuIfCompliance MODULE-COMPLIANCE
       STATUS      current
       DESCRIPTION
           "The compliance statement for EuroModem NIUs
            which implement the DVB-CABLE-NIU-IF-MIB MIB."
       MODULE  -- dvbNiuIf
           MANDATORY-GROUPS { dvbNiuMacGroup,
                              dvbNiuDsRfParamGroup,
                              dvbNiuUsRfParamGroup
                            }
   ::= { dvbNiuIfCompliances 1 }

   dvbNiuMacGroup OBJECT-GROUP
       OBJECTS     {
                     dvbNiuMacHwVer,
                     dvbNiuMacStatStatus,
                     dvbNiuMacStatSlotCfgCrcErrs,
                     dvbNiuMacStatRsCorrErrs,
                     dvbNiuMacStatATMPacketLosses,
                     dvbNiuMacStatSlotConfigCount,
                     dvbNiuMacStatSlEsfCrcErrs,
                     dvbNiuMacStatRsErrCorrFrms,
                     dvbNiuMacStatRsErrNonCorrFrms,
                     dvbNiuMacStatSlEsfFrameCount,
                     dvbNiuMacStatConCount,
                     dvbNiuMacCapOobSig,
                     dvbNiuMacCapVer,
                     dvbNiuMacCapEncap,
                     dvbNiuMacCapMaxConn,
                     dvbNiuMacCapUsBr,
                     dvbNiuMacCapOperation,
                     dvbNiuMacCapDsOobBr,
                     dvbNiuMacCapResReqCap,
                     dvbNiuMacCapFragMacMess,
                     dvbNiuMacCapSecSupp,
                     dvbNiuMacCapMinislots,
                     dvbNiuMacCapIbSig
                   }
       STATUS      current
       DESCRIPTION
           "A collection of objects providing capabilities and
            statistics for the MAC layer."
   ::= { dvbNiuIfGroups 1 }

   dvbNiuDsRfGroup OBJECT-GROUP
       OBJECTS     {
                     dvbNiuRfDsHwVer,
                     dvbNiuRfDsLastGoodFreq,
                     dvbNiuRfDsBackupFreq,
                     dvbNiuRfDsLowScanFreq,
                     dvbNiuRfDsHighScanFreg,
                     dvbNiuRfDsScanStep,

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                     dvbNiuRfDsOobFreq,
                     dvbNiuRfDsIbFreq,
                     dvbNiuRfDsModType,
                     dvbNiuRfDsSnrEst,
                     dvbNiuRfDsPwrLevelEst
                   }
       STATUS      current
       DESCRIPTION
           "A collection of objects providing capabilities and
            statistics for the downstream RF interface."
   ::= { dvbNiuIfGroups 2 }

   dvbNiuUsRfGroup OBJECT-GROUP
       OBJECTS     {
                     dvbNiuRfUsHwVer,
                     dvbNiuRfUsFreq,
                     dvbNiuRfUsPwrCtrlSetting,
                     dvbNiuRfUsTimeOffsetValue
                   }
       STATUS      current
       DESCRIPTION
           "A collection of objects providing capabilities and
            statistics for the upstream RF interface."
   ::= { dvbNiuIfGroups 3 }


   END



5. Security Considerations

   This MIB relates to a system which will provide metropolitan public
   internet access.  As such, improper manipulation of the objects
   represented by this MIB may result in denial of service to a large
   number of end-users.

   There are a number of management objects defined in this MIB that
   have a MAX-ACCESS clause of read-write and/or read-create.  Such
   objects may be considered sensitive or vulnerable in some network
   environments.  The support for SET operations in a non-secure
   environment without proper protection can have a negative effect on
   network operations.  In addition to those mentioned above:

   o    dvbNiuRfDsBackupFreq, dvbNiuRfDsHighScanFreq,
        dvbNiuRfDsScanStep and dvbNiuRfDsLowScanFreq can be manipulated
        to prevent the NIU from acquiring and locking on to the
        downstream channel, thus resulting in denial of service.

   This MIB does not affect confidentiality of services on a cable
   system.



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   SNMPv1 by itself is not a secure environment. Even if the network
   itself is secure (for example by using IPSec), even then, there is
   no control as to who on the secure network is allowed to access and
   GET/SET (read/change/create/delete) the objects in this MIB. It is
   recommended that the implementers consider the security features as
   provided by the SNMPv3 framework. Specifically, the use of the User-
   based Security Model RFC 2574 [RFC2574] and the View- based Access
   Control Model RFC 2575 [RFC2575] is recommended.

   It is then a customer/user responsibility to ensure that the SNMP
   entity giving access to an instance of this MIB, is properly
   configured to give access to the objects only to those principals
   (users) that have legitimate rights to indeed GET or SET
   (change/create/delete) them.



6. References

   [RFC2571]   Harrington, D., Presuhn, R., and B. Wijnen,
               "An Architecture for Describing SNMP Management
               Frameworks", RFC 2571, April 1999.

   [RFC1155]   Rose, M., and K. McCloghrie,
               "Structure and Identification of Management Information
               for TCP/IP-based Internets", STD 16, RFC 1155, May 1990.

   [RFC1212]   Rose, M., and K. McCloghrie,
               "Concise MIB Definitions", STD 16, RFC 1212, March 1991.

   [RFC1215]   M. Rose,
               "A Convention for Defining Traps for use with the SNMP",
               RFC 1215, March 1991.

   [RFC2578]   McCloghrie, K., Perkins, D., Schoenwaelder, J., Case,J.,
               Rose, M., and S. Waldbusser, "Structure of Management
               Information Version 2 (SMIv2)", STD 58, RFC 2578, April
               1999.

   [RFC2579]   McCloghrie, K., Perkins, D., Schoenwaelder, J., Case,
               J., Rose, M., and S. Waldbusser, "Textual Conventions
               for SMIv2", STD 58, RFC 2579, April 1999.

   [RFC2580]   McCloghrie, K., Perkins, D., Schoenwaelder, J., Case,
               J., Rose, M., and S. Waldbusser, "Conformance Statements
               for SMIv2", STD 58, RFC 2580, April 1999.

   [RFC1157]   Case, J., Fedor, M., Schoffstall, M., and J. Davin,
               "Simple Network Management Protocol", STD 15, RFC 1157,
               May 1990.

   [RFC1901]   Case, J., McCloghrie, K., Rose, M., and S. Waldbusser,
               "Introduction to Community-based SNMPv2", RFC 1901,

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               January 1996.

   [RFC1906]   Case, J., McCloghrie, K., Rose, M., and S. Waldbusser,
               "Transport Mappings for Version 2 of the Simple Network
               Management Protocol (SNMPv2)", RFC 1906, January 1996.

   [RFC2572]   Case, J., Harrington D., Presuhn R., and B. Wijnen,
               "Message Processing and Dispatching for the Simple
               Network Management Protocol (SNMP)", RFC 2572, April
               1999.

   [RFC2574]   Blumenthal, U., and B. Wijnen, "User-based Security
               Model (USM) for version 3 of the Simple Network
               Management Protocol (SNMPv3)", RFC 2574, April 1999.

   [RFC1905]   Case, J., McCloghrie, K., Rose, M., and S. Waldbusser,
               "Protocol Operations for Version 2 of the Simple Network
               Management Protocol (SNMPv2)", RFC 1905, January 1996.

   [RFC2573]   Levi, D., Meyer, P., and B. Stewart, "SNMPv3
               Applications", RFC 2573, April 1999.

   [RFC2575]   Wijnen, B., Presuhn, R., and K. McCloghrie, "View-based
               Access Control Model (VACM) for the Simple Network
               Management Protocol (SNMP)", RFC 2575, April 1999.

   [RFC2570]   Case, J., Mundy, R., Partain, D., and B. Stewart,
               "Introduction to Version 3 of the Internet-standard
               Network Management Framework", RFC 2570, April 1999.

   [RFC2119]   Bradner, S., "Key words for use in RFCs to Indicate
               Requirement Levels", BCP 14, RFC 2119, March 1997.

   [RFC2863]   McCloghrie, K. and F. Kastenholz, "The Interfaces Group
               MIB", June 2000

   [EUROM]     ECCA,"Technical Specification of a European Cable Modem
               for digital bi-directional communications via cable
               networks", Version 1.0, 12th May 1999


7. Acknowledgments

   This MIB was the result of the work undertaken by DVB/DAVIC
   Interoperability consortium to define a common management interface
   for EuroModem compliant NIU.

   RFC 2670 edited by Michael St Johns was used as the template for
   this document.


8. Author's Addresses


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   Andrew Valentine
   Engineering Design Centre
   Hughes Network Systems Ltd
   Saxon Street,
   Linford Wood,
   Milton Keynes.
   MK14 6LD
   ENGLAND
   Phone: +44 1908 221122
   Email: a.valentine@eu.hns.com












































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Full Copyright Statement

     Copyright (C) The Internet Society (2000).  All Rights Reserved.

   This document and translations of it may be copied and furnished to
   others, and derivative works that comment on or otherwise explain it
   or assist in its implementation may be prepared, copied, published
   and distributed, in whole or in part, without restriction of any
   kind, provided that the above copyright notice and this paragraph
   are included on all such copies and derivative works.  However, this
   document itself may not be modified in any way, such as by removing
   the copyright notice or references to the Internet Society or other
   Internet organizations, except as needed for the purpose of
   developing Internet standards in which case the procedures for
   copyrights defined in the Internet Standards process must be
   followed, or as required to translate it into languages other than
   English.

   The limited permissions granted above are perpetual and will not be
   revoked by the Internet Society or its successors or assigns.

   This document and the information contained herein is provided on an
   "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING
   TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
   BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION
   HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF
   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

Acknowledgement

   Funding for the RFC Editor function is currently provided by the
   Internet Society.





















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