APS-MIB DEFINITIONS ::= BEGIN

IMPORTS

        MODULE-IDENTITY, NOTIFICATION-TYPE, OBJECT-TYPE,

        Gauge32, Counter32, Integer32, transmission

                FROM SNMPv2-SMI

        TEXTUAL-CONVENTION, RowStatus,

        TimeStamp, StorageType

                FROM SNMPv2-TC

        SnmpAdminString

                FROM SNMP-FRAMEWORK-MIB

        ifIndex, InterfaceIndex

                FROM IF-MIB

        MODULE-COMPLIANCE, OBJECT-GROUP, NOTIFICATION-GROUP

                FROM SNMPv2-CONF;

apsMIB MODULE-IDENTITY

    LAST-UPDATED        "200302280000Z"  -- February 28, 2003

    ORGANIZATION        "IETF AToMMIB Working Group"

    CONTACT-INFO

        "       Jim Kuhfeld

                Postal: RedBack Networks. Inc.

                300 Holger Way

                San Jose, CA 95134-1362

                Tel: +1 408 750 5465

                Email: jkuhfeld@redback.com

                Jeff Johnson

                Postal: RedBack Networks. Inc.

                300 Holger Way

                San Jose, CA 95134-1362

                Tel: +1 408 750 5460

                Email: jeff@redback.com

                Michael Thatcher

                Postal: RedBack Networks. Inc.

                300 Holger Way

                San Jose, CA 95134-1362

                Tel: +1 408 750 5449

                Email: thatcher@redback.com"

    DESCRIPTION

        "This management information module supports the configuration

         and management of SONET linear APS groups. The definitions and

         descriptions used in this MIB have been derived from

         Synchronous Optical Network (SONET) Transport Systems:

         Common Generic Criteria, GR-253-CORE Issue 3, September 2000,

         section 5.3. The MIB is also consistent with the Multiplex

         Section Protection (MSP) protocol as specified in ITU-T

         Recommendation G.783, Characteristics of synchronous digital

         hierarchy (SDH) equipment function blocks, Annex A and B.

         Copyright (C) The Internet Society (2003).  This version of

         this MIB module is part of RFC 3498; see the RFC itself for

         full legal notices.

         "

    REVISION      "200302280000Z"  -- February 28, 2003

    DESCRIPTION

          "Initial version of this MIB, published as RFC 3498."

        ::= { transmission 49 }

apsMIBObjects OBJECT IDENTIFIER

        ::= { apsMIB 1 }

apsMIBNotifications OBJECT IDENTIFIER

        ::= { apsMIB 2 }

apsMIBConformance OBJECT IDENTIFIER

        ::= { apsMIB 3 }

ApsK1K2 ::= TEXTUAL-CONVENTION

    STATUS current

    DESCRIPTION

        "This Textual Convention describes an object that stores

         a SONET K1 and K2 byte APS protocol field.

         K1 is located in the first octet, K2 is located in

         the second octet. Bits are numbered from left to right.

         Bits 1-4 of the K1 byte indicate a request.

         1111  Lockout of Protection

         1110  Forced Switch

         1101  SF - High Priority

         1100  SF - Low Priority

         1011  SD - High Priority

         1010  SD - Low Priority

         1001  not used

         1000  Manual Switch

         0111  not used

         0110  Wait-to-Restore

         0101  not used

         0100  Exercise

         0011  not used

         0010  Reverse Request

         0001  Do Not Revert

         0000  No Request

         Bits 5-8 of the K1 byte indicate the channel associated with

         the request defined in bits 1-4.

         0000 is the Null channel.

         1-14 are working channels.

         15   is the extra traffic channel

         Bits 1-4 of the K2 byte indicate a channel. The channel is

         defined with the same syntax as K1 Bits 5-8.

         Bit 5 of the K2 byte indicates the

         architecture.

         0 if the architecture is 1+1

         1 if the architecture is 1:n

         Bits 6-8 of the K2 byte indicates the mode.

         000 - 011 are reserved for future use

         100  indicates the mode is unidirectional

         101  indicates the mode is bidirectional

         110  RDI-L

         111  AIS-L

        "

    REFERENCE

        "Bellcore (Telcordia Technologies) GR-253-CORE, Issue 3,

        September 2000, 5.3.5."

    SYNTAX      OCTET STRING (SIZE (2))

ApsSwitchCommand ::= TEXTUAL-CONVENTION

    STATUS       current

    DESCRIPTION

        "An APS switch command allows a user to perform protection

         switch actions.

         If the APS switch command cannot be executed because an

         equal or higher priority request is in effect, an

         inconsistentValue error is returned.

         The Switch command values are:

         noCmd

         This value should be returned by a read request when no switch

         command has been written to the object in question since

         initialization. This value may not be used in a write

         operation.  If noCmd is used in a write operation a wrongValue

         error is returned.

         clear

         Clears all of the switch commands listed below for the

         specified channel.

         lockoutOfProtection

         Prevents any of the working channels from switching to the

         protection line. The specified channel should be the protection

         channel, otherwise an inconsistentValue error is returned.

         forcedSwitchWorkToProtect

         Switches the specified working channel to the protection line.

         If the protection channel is specified an inconsistentValue

         error is returned.

         forcedSwitchProtectToWork

         Switches the working channel back from the protection

         line to the working line. The specified channel should be

         the protection channel, otherwise an inconsistentValue

         error is returned.

         manualSwitchWorkToProtect

         Switches the specified working channel to the protection line.

         If the protection channel is specified an inconsistentValue

         error is returned.

         manualSwitchProtectToWork

         Switches the working channel back from the protection

         line to the working line. The specified channel should be

         the protection channel, otherwise an inconsistentValue

         error is returned.

         exercise

         Exercises the protocol for a protection switch of the specified

         channel by issuing an Exercise request for that channel and

         checking the response on the APS channel. "

    SYNTAX       INTEGER {

                     noCmd(1),

                     clear(2),

                     lockoutOfProtection(3),

                     forcedSwitchWorkToProtect(4),

                     forcedSwitchProtectToWork(5),

                     manualSwitchWorkToProtect(6),

                     manualSwitchProtectToWork(7),

                     exercise(8)

                 }

ApsControlCommand ::= TEXTUAL-CONVENTION

    STATUS       current

    DESCRIPTION

        "An APS control command applies only to LTE that support the

         1:n architecture and performs the following actions.

         The Control command values are:

         noCmd

         This value should be returned by a read request when no control

         command has been written to the object in question since

         initialization. This value may not be used in a write

         operation.  If noCmd is used in a write operation a wrongValue

         error is returned.

         lockoutWorkingChannel

         Prevents the specified working channel from switching to the

         protection line. If the protection line is specified an

         inconsistentValue error is returned.

         clearLockoutWorkingChannel

         Clears the lockout a working channel command for the channel

         specified. If the protection line is specified an

         inconsistentValue error is returned."

    SYNTAX       INTEGER {

                     noCmd(1),

                     lockoutWorkingChannel(2),

                     clearLockoutWorkingChannel(3)

                 }

--

-- APS Configuration Table

--

-- This table supports the addition, configuration and deletion of APS

-- groups.

--

apsConfig     OBJECT IDENTIFIER ::= { apsMIBObjects 1 }

apsConfigGroups OBJECT-TYPE

    SYNTAX      Gauge32

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "The count of APS groups. This count includes all rows in

         apsConfigTable, regardless of the value of apsConfigRowStatus."

    ::= { apsConfig 1 }

apsConfigTable OBJECT-TYPE

    SYNTAX      SEQUENCE OF ApsConfigEntry

    MAX-ACCESS  not-accessible

    STATUS      current

    DESCRIPTION

        "This table lists the APS groups that have been configured

         on the system."

    ::= { apsConfig 2 }

apsConfigEntry OBJECT-TYPE

    SYNTAX      ApsConfigEntry

    MAX-ACCESS  not-accessible

    STATUS      current

    DESCRIPTION

        "A conceptual row in the apsConfigTable."

    INDEX { IMPLIED apsConfigName }

    ::= { apsConfigTable  1 }

ApsConfigEntry ::= SEQUENCE {

    apsConfigName                  SnmpAdminString,

    apsConfigRowStatus             RowStatus,

    apsConfigMode                  INTEGER,

    apsConfigRevert                INTEGER,

    apsConfigDirection             INTEGER,

    apsConfigExtraTraffic          INTEGER,

    apsConfigSdBerThreshold        Integer32,

    apsConfigSfBerThreshold        Integer32,

    apsConfigWaitToRestore         Integer32,

    apsConfigCreationTime          TimeStamp,

    apsConfigStorageType           StorageType

}

apsConfigName OBJECT-TYPE

    SYNTAX      SnmpAdminString (SIZE (1..32))

    MAX-ACCESS  not-accessible

    STATUS      current

    DESCRIPTION

        "A textual name for the APS group."

    ::= { apsConfigEntry 1 }

apsConfigRowStatus OBJECT-TYPE

    SYNTAX      RowStatus

    MAX-ACCESS  read-create

    STATUS      current

    DESCRIPTION

        "The status of this APS group entry.

        An entry may not exist in the active state unless all

        objects in the entry have an appropriate value. Also,

        all associated apsChanConfigEntry rows must represent

        a set of consecutive channel numbers beginning with

        0 or 1, depending on the selected architecture.

        When set to notInService changes may be made to apsConfigMode,

        apsConfigRevert, apsConfigDirection, apsConfigExtraTraffic,

        apsConfigSdBerThreshold, apsConfigSfBerThreshold,

        and apsConfigWaitToRestore. Also, associated apsChanConfigTable

        objects may be added, deleted and modified."

    ::= { apsConfigEntry 2 }

apsConfigMode OBJECT-TYPE

    SYNTAX      INTEGER {

                        onePlusOne(1),

                        oneToN(2),

                        onePlusOneCompatible(3),

                        onePlusOneOptimized(4)

                        }

    MAX-ACCESS  read-create

    STATUS      current

    DESCRIPTION

       "The architecture of the APS group.

        onePlusOne

        The 1+1 architecture permanently bridges the working

        line to the protection line.

        oneToN

        The 1:n architecture allows one protection channel to

        protect up to n working channels. When a fault is detected

        on one of the n working channels that channel is bridged

        over the protection channel.

        onePlusOneCompatible

        This refers to 1 + 1 bidirectional switching compatible with

        1:n bidirectional switching as specified in ITU-T

        Recommendation G.783 (04/97) section A.3.4.1. Since this

        mode necessitates bidirectional switching, apsConfigDirection

        must be set to bidirectional whenever onePlusOneCompatible

        is set.

        onePlusOneOptimized

        This refers to 1 + 1 bidirectional switching optimized

        for a network using predominantly 1 + 1 bidirectional

        switching as specified in ITU-T Recommendation G.783 (04/97)

        section B.1. Since this mode necessitates bidirectional

        switching, apsConfigDirection must be set to bidirectional

        whenever onePlusOneOptimized is set.

        This object may not be modified if the associated

        apsConfigRowStatus object is equal to active(1)."

    DEFVAL {onePlusOne}

    ::= { apsConfigEntry 3 }

apsConfigRevert OBJECT-TYPE

    SYNTAX      INTEGER { nonrevertive(1), revertive(2) }

    MAX-ACCESS  read-create

    STATUS      current

    DESCRIPTION

       "The revertive mode of the APS group.

        nonrevertive

        Traffic remains on the protection line until another switch

        request is received.

        revertive

        When the condition that caused a switch to the protection

        line has been cleared the signal is switched back to the

        working line. Since switching is revertive with the 1:n

        architecture, apsConfigRevert must be set to revertive if

        apsConfigMode is set to oneToN.

        Switching may optionally be revertive with the 1+1 architecture.

        This object may not be modified if the associated

        apsConfigRowStatus object is equal to active(1). "

    DEFVAL { nonrevertive }

    ::= { apsConfigEntry 4 }

apsConfigDirection OBJECT-TYPE

    SYNTAX      INTEGER { unidirectional(1), bidirectional(2) }

    MAX-ACCESS  read-create

    STATUS      current

    DESCRIPTION

       "The directional mode of the APS group.

        unidirectional

        The unidirectional mode provides protection in one direction.

        bidirectional

        The bidirectional mode provides protection in both

        directions.

        This object may not be modified if the associated

        apsConfigRowStatus object is equal to active(1). "

    DEFVAL {unidirectional}

    ::= { apsConfigEntry 5 }

apsConfigExtraTraffic OBJECT-TYPE

    SYNTAX      INTEGER { enabled(1), disabled(2) }

    MAX-ACCESS  read-create

    STATUS      current

    DESCRIPTION

       "This object enables or disables the transfer of extra traffic

        on the protection channel in a 1:n architecture. This object

        must be set to disabled if the architecture is 1+1. It may be

        necessary to disable this in order to interwork with other SONET

        network elements that don't support extra traffic.

        This object may not be modified if the associated

        apsConfigRowStatus object is equal to active(1). "

    DEFVAL { disabled }

    ::= { apsConfigEntry 6 }

apsConfigSdBerThreshold OBJECT-TYPE

    SYNTAX      Integer32 (5..9)

    MAX-ACCESS  read-create

    STATUS      current

    DESCRIPTION

        "The Signal Degrade Bit Error Rate.

         The negated value of this number is used as the exponent of

         10 for computing the threshold value for the Bit Error Rate

         (BER). For example, a value of 5 indicates a BER threshold of

         10^-5.

         This object may be modified if the associated

         apsConfigRowStatus object is equal to active(1)."

    DEFVAL { 5 }

    ::= { apsConfigEntry 7 }

apsConfigSfBerThreshold OBJECT-TYPE

    SYNTAX      Integer32 (3..5)

    MAX-ACCESS  read-create

    STATUS      current

    DESCRIPTION

        "The Signal Failure Bit Error Rate.

         The negated value of this number is used as the exponent of

         10 for computing the threshold value for the Bit Error Rate

         (BER). For example, a value of 5 indicates a BER threshold of

         10^-5.

         This object may be modified if the associated

         apsConfigRowStatus object is equal to active(1)."

    DEFVAL { 3 }

    ::= { apsConfigEntry 8 }

apsConfigWaitToRestore OBJECT-TYPE

    SYNTAX      Integer32 (0..720)

    UNITS       "seconds"

    MAX-ACCESS  read-create

    STATUS      current

    DESCRIPTION

        "The Wait To Restore period in seconds.

         After clearing of a condition that necessitated an

         automatic switch, the wait to restore period must elapse

         before reverting. This is intended to avoid rapid switch

         oscillations.

         GR-253-CORE specifies a Wait To Restore range of 5 to 12

         minutes. G.783 defines a 5 to 12 minute Wait To Restore

         range in section 5.4.1.1.3, but also allows for a shorter

         WTR period in  Table 2-1,

         WaitToRestore value (MI_WTRtime: 0..(5)..12 minutes).

         This object may not be modified if the associated

         apsConfigRowStatus object is equal to active(1)."

    DEFVAL { 300 }

    ::= { apsConfigEntry 9 }

apsConfigCreationTime OBJECT-TYPE

    SYNTAX      TimeStamp

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "The value of sysUpTime at the time the row was

         created"

    ::= { apsConfigEntry 10 }

apsConfigStorageType OBJECT-TYPE

    SYNTAX      StorageType

    MAX-ACCESS  read-create

    STATUS      current

    DESCRIPTION

        "The storage type for this conceptual row.

         Conceptual rows having the value 'permanent' need not

         allow write-access to any columnar objects in the row."

    DEFVAL      { nonVolatile }

    ::= { apsConfigEntry 11 }

--

-- APS Status Table

--

-- This table provides APS group statistics.

--

apsStatusTable OBJECT-TYPE

    SYNTAX      SEQUENCE OF ApsStatusEntry

    MAX-ACCESS  not-accessible

    STATUS      current

    DESCRIPTION

        "This table provides status information about APS groups

         that have been configured on the system."

    ::= { apsMIBObjects 2 }

apsStatusEntry OBJECT-TYPE

    SYNTAX      ApsStatusEntry

    MAX-ACCESS  not-accessible

    STATUS      current

    DESCRIPTION

        "A conceptual row in the apsStatusTable."

    AUGMENTS { apsConfigEntry }

    ::= { apsStatusTable  1 }

ApsStatusEntry ::= SEQUENCE {

    apsStatusK1K2Rcv               ApsK1K2,

    apsStatusK1K2Trans             ApsK1K2,

    apsStatusCurrent               BITS,

    apsStatusModeMismatches        Counter32,

    apsStatusChannelMismatches     Counter32,

    apsStatusPSBFs                 Counter32,

    apsStatusFEPLFs                Counter32,

    apsStatusSwitchedChannel       Integer32,

    apsStatusDiscontinuityTime     TimeStamp

}

apsStatusK1K2Rcv OBJECT-TYPE

    SYNTAX      ApsK1K2

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "The current value of the K1 and K2 bytes received on the

         protection channel."

    ::= { apsStatusEntry 1 }

apsStatusK1K2Trans OBJECT-TYPE

    SYNTAX        ApsK1K2

    MAX-ACCESS    read-only

    STATUS        current

    DESCRIPTION

        "The current value of the K1 and K2 bytes transmitted on the

         protection channel."

    ::= { apsStatusEntry 2 }

apsStatusCurrent OBJECT-TYPE

    SYNTAX      BITS {

                  modeMismatch(0),

                  channelMismatch(1),

                  psbf(2),

                  feplf(3),

                  extraTraffic(4)

                 }

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "The current status of the APS group.

         modeMismatch

         Modes other than 1+1 unidirectional monitor protection line

         K2 bit 5, which indicates the architecture and K2 bits

         6-8, which indicate if the mode is unidirectional or

         bidirectional. A conflict between the current local mode

         and the received K2 mode information constitutes a

         mode mismatch.

         channelMismatch

         This bit indicates a  mismatch between the transmitted K1

         channel and the received K2 channel has been detected.

         psbf

         This bit indicates a Protection Switch Byte Failure (PSBF) is

         in effect. This condition occurs when either an inconsistent

         APS byte or an invalid code is detected. An inconsistent APS

         byte occurs when no three consecutive K1 bytes of the last 12

         successive frames are identical, starting with the last frame

         containing a previously consistent byte. An invalid code occurs

         when the incoming K1 byte contains an unused code or a code

         irrelevant for the specific switching operation (e.g., Reverse

         Request while no switching request is outstanding) in three

         consecutive frames. An invalid code also occurs when the

         incoming K1 byte contains an invalid channel number in three

         consecutive frames.

         feplf

         Modes other than 1+1 unidirectional monitor the K1 byte

         for Far-End Protection-Line failures. A Far-End

         Protection-Line defect is declared based on receiving

         SF on the protection line.

         extraTraffic

         This bit indicates whether extra traffic is currently being

         accepted on the protection line. "

    ::= { apsStatusEntry 3 }

apsStatusModeMismatches OBJECT-TYPE

    SYNTAX     Counter32

    MAX-ACCESS read-only

    STATUS     current

    DESCRIPTION

        "A count of Mode Mismatch conditions.

         Discontinuities in the value of this counter can occur at

         re-initialization of the management system, and at other

         times as indicated by the value of

         apsStatusDiscontinuityTime."

    ::= { apsStatusEntry 4 }

apsStatusChannelMismatches OBJECT-TYPE

    SYNTAX     Counter32

    MAX-ACCESS read-only

    STATUS     current

    DESCRIPTION

        "A count of Channel Mismatch conditions.

         Discontinuities in the value of this counter can occur at

         re-initialization of the management system, and at other

         times as indicated by the value of

         apsStatusDiscontinuityTime."

    ::= { apsStatusEntry 5 }

apsStatusPSBFs OBJECT-TYPE

    SYNTAX     Counter32

    MAX-ACCESS read-only

    STATUS     current

    DESCRIPTION

        "A count of Protection Switch Byte Failure conditions.

         This condition occurs when either an inconsistent APS

         byte or an invalid code is detected. An inconsistent APS

         byte occurs when no three consecutive K1 bytes of the last

         12 successive frames are identical, starting with the last

         frame containing a previously consistent byte. An invalid

         code occurs when the incoming K1 byte contains an unused

         code or a code irrelevant for the specific switching

         operation (e.g., Reverse Request while no switching request

         is outstanding) in three consecutive frames. An invalid code

         also occurs when the incoming K1 byte contains an invalid

         channel number in three consecutive frames.

         Discontinuities in the value of this counter can occur at

         re-initialization of the management system, and at other

         times as indicated by the value of

         apsStatusDiscontinuityTime."

    ::= { apsStatusEntry 6 }

apsStatusFEPLFs OBJECT-TYPE

    SYNTAX     Counter32

    MAX-ACCESS read-only

    STATUS     current

    DESCRIPTION

        "A count of Far-End Protection-Line Failure conditions.

         This condition is declared based on receiving SF on

         the protection line in the K1 byte.

         Discontinuities in the value of this counter can occur at

         re-initialization of the management system, and at other

         times as indicated by the value of

         apsStatusDiscontinuityTime."

    ::= { apsStatusEntry 7 }

apsStatusSwitchedChannel OBJECT-TYPE

    SYNTAX     Integer32

    MAX-ACCESS read-only

    STATUS     current

    DESCRIPTION

        "This field is set to the number of the channel that is

         currently switched to protection. The value 0 indicates no

         channel is switched to protection. The values 1-14 indicate

         that working channel is switched to protection."

    ::= { apsStatusEntry 8 }

apsStatusDiscontinuityTime OBJECT-TYPE

    SYNTAX      TimeStamp

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "The value of sysUpTime on the most recent occasion at which

         any one or more of this APS group's counters suffered a

         discontinuity.  The relevant counters are the specific

         instances associated with this APS group of any Counter32

         object contained in apsStatusTable. If no such

         discontinuities have occurred since the last re-initialization

         of the local management subsystem, then this object contains

         a zero value."

    ::= { apsStatusEntry 9 }

--

-- APS Map Group

--

-- Lists the SONET LTE interfaces that may be used to create APS groups.

--

apsMap      OBJECT IDENTIFIER ::= { apsMIBObjects 3 }

apsChanLTEs OBJECT-TYPE

    SYNTAX      Gauge32

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "The count of SONET LTE interfaces on the system.

         Each interface that is included has an ifType value of

         sonet(39)."

    ::= { apsMap 1 }

apsMapTable OBJECT-TYPE

    SYNTAX      SEQUENCE OF ApsMapEntry

    MAX-ACCESS  not-accessible

    STATUS      current

    DESCRIPTION

        "This table lists the SONET LTE interfaces on the system.

         Each interface that is listed has an ifType value of

         sonet(39)."

    ::= { apsMap 2 }

apsMapEntry OBJECT-TYPE

    SYNTAX      ApsMapEntry

    MAX-ACCESS  not-accessible

    STATUS      current

    DESCRIPTION

        "A conceptual row in the apsMapTable."

    INDEX { ifIndex }

    ::= { apsMapTable  1 }

ApsMapEntry ::= SEQUENCE {

    apsMapGroupName             SnmpAdminString,

    apsMapChanNumber            Integer32

}

apsMapGroupName OBJECT-TYPE

    SYNTAX      SnmpAdminString (SIZE (0..32))

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "A textual name for the APS group which this channel is

         included in. If the channel is not part of an APS group

         this value is set to a string of size 0.

         When an instance of apsChanConfigIfIndex is set equal to an

         instance of ifIndex that has an ifType value of sonet(39),

         apsMapGroupName is set equal to the corresponding value of

         apsChanConfigGroupName.

         If an instance of ifIndex that has an ifType value of

         sonet(39) ceases to be equal to an instance of

         apsChanConfigIfIndex, either because of a change in the value

         of apsChanConfigIfIndex, or because of row deletion in the

         ApsChanConfigTable, apsMapGroupName is set to a string of

         size 0."

    ::= { apsMapEntry 2 }

apsMapChanNumber OBJECT-TYPE

    SYNTAX     Integer32 (-1..14)

    MAX-ACCESS read-only

    STATUS     current

    DESCRIPTION

        "This field is set to a unique channel number within an APS

         group.  The value 0 indicates the null channel. The values

         1-14 define a working channel. If the SONET LTE is not part

         of an APS group this value is set to -1.

         When an instance of apsChanConfigIfIndex is set equal to an

         instance of ifIndex that has an  ifType value of sonet(39),

         apsMapChanNumber is set equal to the corresponding value of

         apsChanConfigNumber.

         If an instance of ifIndex that has an  ifType value of

         sonet(39) ceases to be equal to an instance of

         apsChanConfigIfIndex, either because of a change in the

         value of apsChanConfigIfIndex, or because of row deletion

         in the ApsChanConfigTable, apsMapChanNumber is set to -1."

    ::= { apsMapEntry 3 }

--

-- APS Channel Configuration Table

--

-- This table supports the addition, configuration and deletion of

-- channels in APS groups.

--

apsChanConfigTable OBJECT-TYPE

    SYNTAX      SEQUENCE OF ApsChanConfigEntry

    MAX-ACCESS  not-accessible

    STATUS      current

    DESCRIPTION

        "This table lists the APS channels that have been configured

         in APS groups."

    ::= { apsMIBObjects 4 }

apsChanConfigEntry OBJECT-TYPE

    SYNTAX      ApsChanConfigEntry

    MAX-ACCESS  not-accessible

    STATUS      current

    DESCRIPTION

        "A conceptual row in the apsChanConfigTable."

    INDEX {apsChanConfigGroupName, apsChanConfigNumber}

    ::= { apsChanConfigTable  1 }