ADSL-DMT-LINE-MIB

All MIBs › ADSL-DMT-LINE-MIB

Organization: ADSL Forum

Last Updated: 1998-09-25

Category: DSL and Broadband

Description: Manages Discrete Multi-Tone (DMT) ADSL line interfaces, providing configuration, status, and performance data for DSL connections.

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What Is ADSL-DMT-LINE-MIB?

ADSL-DMT-LINE-MIB is a vendor-neutral IETF standards-track MIB (based on RFC 2662) that manages Discrete Multi-Tone (DMT) encoded ADSL lines, modeling both the central-office-side modem (ATU-C) and remote/customer-side modem (ATU-R) of a DSL connection. It exposes per-line configuration and physical-layer status through tables like adslLineDmtTable, adslAtucDmtPhysTable, and adslAturDmtPhysTable, covering trellis coding, embedded operations channel (EOC) settings, line state, and whether fast or interleaved data paths are in use, plus separate channel-level tables (adslAtucDmtChanTable, adslAturDmtChanTable). This is fundamentally a physical-layer/software line-status MIB used to monitor DSL modem hardware health and signal condition, things like loss of signal/frame/link (per its Los/Lof/Lol naming conventions), errored seconds, and modem operational state on both ends of the copper pair, which are the key indicators of a degraded or failed DSL connection. It is explicitly designed to extend/complement the base ADSL-LINE-MIB (RFC 2662 family) and shares its Atuc/Atur naming conventions, so it is not meant to stand alone. As an ADSL-DMT-LINE-MIB reference, it is typically deployed on DSLAMs and ADSL modems/routers in telco or ISP broadband access networks.

IPNetwork Monitor allows you to monitor SNMP objects defined in ADSL-DMT-LINE-MIB. Use the built-in SNMP Monitoring Browser to explore available variables, view their current values and descriptions, and select the objects you want to monitor. You can then create SNMP monitors, configure thresholds, and receive alerts when monitored values change.

Supported Devices

vendor-neutral, standards-based MIB (RFC 2662), not tied to a specific manufacturer; applies to DSLAMs and ADSL modems/routers

Monitoring Examples

An operator would poll adslAtucDmtPhysTable / adslAtucDmtPhysEntry for adslAtucDmtState to confirm the central-office modem has successfully trained up, and check adslAtucDmtTrellis and adslAtucDmtEOC settings against the expected line configuration. Comparing adslAtucDmtFastPath and adslAtucDmtInterleavePath usage between adslAtucDmtChanTable and adslAturDmtChanTable would reveal whether the line is running in the expected latency mode. A line reporting Los/Lof/Lol style errors in the associated status objects would indicate a failing copper pair or CPE modem needing dispatch.

What Can Be Monitored

ADSL line state (ATU-C/ATU-R)
trellis coding/EOC configuration
fast vs interleaved data path usage
loss of signal/frame/link status
per-channel line statistics

Imported Objects

From ADSL-LINE-MIB

adslLCSMib	OBJECT-IDENTITY
adslLineConfProfileName	OBJECT-TYPE

From IF-MIB

ifIndex

OBJECT-TYPE

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

MODULE-IDENTITY
OBJECT-TYPE

OIDs

OID symbolic	OID numeric	Type	Access	Description
adslLineDmtMIB	1.3.6.1.2.1.10.94.1.1.16.2			Naming Conventions: Atuc -- (ATUC) modem at near (Central) end of line Atur -- (ATUR) modem at Remote end of line ES -- Errored Second. LCS -- Line Code Specific Lof -- Loss of Frame Lol -- Loss of Link Los -- Loss of Signal Lpr -- Loss of Power
adslLineDmtMIBObjects	1.3.6.1.2.1.10.94.1.1.16.2.1
adslLineDmtTable	1.3.6.1.2.1.10.94.1.1.16.2.1.1		not-accessible	This table extends the adslLineTable and contains common attributes describing both ends of ADSL lines supported by the system.
adslLineDmtEntry	1.3.6.1.2.1.10.94.1.1.16.2.1.1.1		not-accessible	A set of common attributes describing both ends of an ADSL line supported by the system. There exist an entry for each ifEntry with an ifType of adsl(94).
INT adslLineDmtTrellis	1.3.6.1.2.1.10.94.1.1.16.2.1.1.1.1	INTEGER	read-only	Reports whether the Trellis coding is used on the DMT line. Use of trellis coding is determined at line initialization with C-MSGS1 and R-MSGS1 exchanges and will not change until the line is re-initialized.
INT adslLineDmtEOC	1.3.6.1.2.1.10.94.1.1.16.2.1.1.1.2	INTEGER	read-only	Reports whether the eoc can support autonomous data streaming mode or only transaction mode. After initialization, unknown is reported until sufficient autonomous eoc messages have been transmitted to determine the true capability of both ATUs.
adslAtucDmtPhysTable	1.3.6.1.2.1.10.94.1.1.16.2.1.2		not-accessible	This table extends the adslAtucPhysTable and contains specific physical layer parameters for the ATU-C class devices supported by the system.
adslAtucDmtPhysEntry	1.3.6.1.2.1.10.94.1.1.16.2.1.2.1		not-accessible	A set of physical-layer parameters for an ATU-C class device supported by the system. There exists an entry for each ifEntry with an ifType of adsl(94).
INT adslAtucDmtIssue	1.3.6.1.2.1.10.94.1.1.16.2.1.2.1.1	INTEGER	read-only	Reports the issue number of the relevant standard that the DMT ADSL transceiver at the ATU-C is currently operating to. The issue number will be fixed by the hardware and is transmitted by the ATU-C in C-MSGS1 during initialization.
INT adslAtucDmtState	1.3.6.1.2.1.10.94.1.1.16.2.1.2.1.2	INTEGER	read-only	Reports current state of the ATU-C DMT transceiver. The current state can change dynamically. The SNMP agent reports the state after querying the ATU-C state machine.
INT adslAtucDmtInterleavePath	1.3.6.1.2.1.10.94.1.1.16.2.1.2.1.3	INTEGER	read-only	Reports bearer channel of downstream interleaved path.
INT adslAtucDmtFastPath	1.3.6.1.2.1.10.94.1.1.16.2.1.2.1.4	INTEGER	read-only	Reports bearer channel of downstream fast path.
adslAturDmtPhysTable	1.3.6.1.2.1.10.94.1.1.16.2.1.3		not-accessible	This table extends the adslAturPhysTable and contains physical layer parameters for the ATU-R class devices supported by the system.
adslAturDmtPhysEntry	1.3.6.1.2.1.10.94.1.1.16.2.1.3.1		not-accessible	A set of physical-layer parameters for an ATU-R class device supported by the system. There exists an entry for each ifEntry with an ifType of adsl(94).
INT adslAturDmtIssue	1.3.6.1.2.1.10.94.1.1.16.2.1.3.1.1	INTEGER	read-only	Reports the issue number of the relevant standard that the DMT ADSL transceiver at the ATU-R is currently operating to. The issue number will be fixed by the hardware and is transmitted by the ATU-R in R-MSGS1 during initialization.
INT adslAturDmtState	1.3.6.1.2.1.10.94.1.1.16.2.1.3.1.2	INTEGER	read-only	Reports current state of the ATU-R DMT transceiver. The current state can change dynamically. ATU-R state is reported by the SNMP agent at the ATU-C which infers the state depending on the ATU-C state. When the inference cannot be made, unknown state is returned.
INT adslAturDmtInterleavePath	1.3.6.1.2.1.10.94.1.1.16.2.1.3.1.3	INTEGER	read-only	Reports bearer channel of upstream interleaved path.
INT adslAturDmtFastPath	1.3.6.1.2.1.10.94.1.1.16.2.1.3.1.4	INTEGER	read-only	Reports bearer channel of upstream fast path.
adslAtucDmtChanTable	1.3.6.1.2.1.10.94.1.1.16.2.1.4
adslAturDmtChanTable	1.3.6.1.2.1.10.94.1.1.16.2.1.5
adslAtucDmtPerfDataTable	1.3.6.1.2.1.10.94.1.1.16.2.1.6
adslAturDmtPerfDataTable	1.3.6.1.2.1.10.94.1.1.16.2.1.7
adslAtucDmtIntervalTable	1.3.6.1.2.1.10.94.1.1.16.2.1.8
adslAturDmtIntervalTable	1.3.6.1.2.1.10.94.1.1.16.2.1.9
adslAtucDmtChanPerfDataTable	1.3.6.1.2.1.10.94.1.1.16.2.1.10
adslAturDmtChanPerfDataTable	1.3.6.1.2.1.10.94.1.1.16.2.1.11
adslAtucDmtChanIntervalTable	1.3.6.1.2.1.10.94.1.1.16.2.1.12
adslAturDmtChanIntervalTable	1.3.6.1.2.1.10.94.1.1.16.2.1.13
adslLineDmtConfProfileIndexNext	1.3.6.1.2.1.10.94.1.1.16.2.1.14
adslLineDmtConfProfileTable	1.3.6.1.2.1.10.94.1.1.16.2.1.15		not-accessible	This table extends the adslLineConfProfileTable and contains ADSL DMT line configuration information.
adslLineDmtConfProfileEntry	1.3.6.1.2.1.10.94.1.1.16.2.1.15.1		not-accessible	A configuration profile containing ADSL DMT line configuration information.
OCT adslAtucDmtConfFreqBins	1.3.6.1.2.1.10.94.1.1.16.2.1.15.1.1	OCTET STRING	read-create	A string of 32 bits to enable/disable the incoming DMT frequency bins that the ATU-C receiver monitors. Each bit controls one bin with the first bit of the first octet controlling sub-carrier zero (lowest frequency bin). A bit set to 1 disables reception of the specified sub- carrier frequency bin end a 0 enables reception.
OCT adslAturDmtConfFreqBins	1.3.6.1.2.1.10.94.1.1.16.2.1.15.1.2	OCTET STRING	read-create	A string of 256 bits to enable/disable the incoming DMT frequency bins that the ATU-R receiver should monitor after the next activation. The mechanism to pass adslAturDMTConfFreqBins to the ATU-R is vendor specific. Each bit controls one bin with the first bit of the first octet controlling sub-carrier zero (lowest frequency bin). A bit set to 1 disables reception of the specified sub-carrier frequency bin end a 0 enables reception.
INT adslLineDmtConfMode	1.3.6.1.2.1.10.94.1.1.16.2.1.15.1.3	INTEGER	read-create	Defines the operational mode of the DMT ADSL transceiver. Configured in the C-MSG1 and C-MSG-RA exchanges.
INT adslLineDmtConfTrellis	1.3.6.1.2.1.10.94.1.1.16.2.1.15.1.4	INTEGER	read-create	Enables the Trellis coder of the DMT transceiver. Configured in the C-MSG1 and C-MSG-RA exchanges.
INT adslLineDmtConfEOC	1.3.6.1.2.1.10.94.1.1.16.2.1.15.1.5	INTEGER	read-create	Defines the embedded operations channel mode for the DMT ADSL line.
INT adslAtucDmtConfInterleavePath	1.3.6.1.2.1.10.94.1.1.16.2.1.15.1.6	INTEGER	read-create	Target channel for downstream interleave data path.
INT adslAtucDmtConfFastPath	1.3.6.1.2.1.10.94.1.1.16.2.1.15.1.7	INTEGER	read-create	Target channel for downstream fast data path.
INT adslAturDmtConfInterleavePath	1.3.6.1.2.1.10.94.1.1.16.2.1.15.1.8	INTEGER	read-create	Target channel for upstream interleave data path.
INT adslAturDmtConfFastPath	1.3.6.1.2.1.10.94.1.1.16.2.1.15.1.9	INTEGER	read-create	Target channel for upstream fast data path.
adslLineDmtAlarmConfProfileIndexNext	1.3.6.1.2.1.10.94.1.1.16.2.1.16
adslLineDmtAlarmConfProfileTable	1.3.6.1.2.1.10.94.1.1.16.2.1.17
adslDmtLineMIBNotificationsPrefix	1.3.6.1.2.1.10.94.1.1.16.2.2
adslDmtLineMIBNotifications	1.3.6.1.2.1.10.94.1.1.16.2.2.0
adslLineDmtMIBConformance	1.3.6.1.2.1.10.94.1.1.16.2.3
adslLineDmtMIBCompliances	1.3.6.1.2.1.10.94.1.1.16.2.3.1
adslDMTLineMibCompliance	1.3.6.1.2.1.10.94.1.1.16.2.3.1.1			The compliance statement for SNMP entities which have ADSL DMT interfaces.
adslLineDmtMIBAturCompliance	1.3.6.1.2.1.10.94.1.1.16.2.3.1.2			The compliance statement for SNMP entities which manage ADSL DMT ATU-R interfaces.
adslLineDmtMIBGroups	1.3.6.1.2.1.10.94.1.1.16.2.3.2
adslLineDmtGroup	1.3.6.1.2.1.10.94.1.1.16.2.3.2.1			A collection of managed objects defining the attributes of an ADSL line supportings modems using the DMT line code.
adslAtucDmtPhysGroup	1.3.6.1.2.1.10.94.1.1.16.2.3.2.2			A collection of managed objects defining the physical-layer parameters of an ATU-C using the DMT line code.
adslAturDmtPhysGroup	1.3.6.1.2.1.10.94.1.1.16.2.3.2.3			A collection of managed objects defining the physical-layer parameters of an ATU-R using the DMT line code.
adslLineDmtConfProfileGroup	1.3.6.1.2.1.10.94.1.1.16.2.3.2.4			A collection of managed objects defining the line configuration information associated with one or more ADSL ATU class devices implementing the DMT line code.

RFC description

Extends ADSL line management with DMT-specific attributes for both near and remote ends of ADSL connections.

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Download ADSL-DMT-LINE-MIB

What Is ADSL-DMT-LINE-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description