ERI-DNX-T3-MIB

MIB Reference — IPNetwork Monitor · Updated October 05, 2026

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Organization: Eastern Research, Inc.

Last Updated: 2002-08-19

Category: Domain: WAN/TDM, Vendor: ERI

Description: Monitors DS3/T3 (45 Mbps) interface framing, performance counters, and alarm conditions in ERI DNX WAN systems.

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What Is ERI-DNX-T3-MIB?

ERI-DNX-T3-MIB is an Eastern Research, Inc. (ERI) enterprise MIB for the T3 (DS3, 45 Mbps) interface card in ERI's DNX WAN multiplexer/nest chassis. Contrary to the hint description's mention of performance counters, the module as written is almost entirely a configuration MIB: t3PortConfigTable (indexed by a LinkPortAddress slot/port identifier) covers per-port M13 multiplex mode, receive loop timing, short-cable compensation, remote loop, and AIS receive/transmit control, while t3T1LinkConfigTable covers each demultiplexed T1 tributary's framing, line density, network loopback, yellow-alarm handling, ESF format, and idle code, and both tables include a command-status object used to apply pending changes. A t3Diag branch is reserved in the OID tree but has no objects defined in this revision, and the only notifications present, t3PortConfigTrap and t3T1ConfigTrap, fire on user configuration changes rather than on a genuine fault condition. It depends on ERI-DNX-SMC-MIB for shared types (LinkPortAddress, PortStatus, FunctionSwitch) and on the parent DNX nest/shelf MIBs for chassis context, and it's deployed on ERI DNX T3 interface cards in legacy WAN multiplexer nests, where administrators can download the ERI-DNX-T3-MIB file to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in ERI-DNX-T3-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

  • Eastern Research (ERI) DNX WAN multiplexer T3/DS3 interface cards

Monitoring Examples

An operator polls t3M13OpMode and t3RcvAIS per t3CfgAddr in t3PortConfigTable to confirm a T3 port's multiplex mode and AIS handling match the circuit design, and receipt of a t3PortConfigTrap without a corresponding change ticket would indicate an unexpected configuration change on that DS3 port.

What Can Be Monitored

  • T3/DS3 port M13 multiplex mode configuration
  • receive loop timing & short-cable compensation
  • AIS receive/transmit control
  • T1 tributary framing/line density/loopback configuration
  • command-status (pending change) objects
  • configuration-change notifications (T3 port / T1 link)
Imported Objects

From ERI-DNX-SMC-MIB

DecisionType
FunctionSwitch
LinkCmdStatus
LinkPortAddress
PortStatus
devicesOBJECT-IDENTITY
dnxOBJECT-IDENTITY
trapSequenceOBJECT-TYPE

From ERI-ROOT-SMI

eriMibsOBJECT-IDENTITY

From SNMPv2-SMI

Integer32
IpAddress
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-IDENTITY
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

DisplayString
OIDs

RFC description

Manages T3 port configuration, diagnostics, and link statistics on Eastern Research DNX data service equipment.

Start monitoring Eastern Research Inc. (ERI) DNX digital cross-connect/multiplexer (T3/DS3 interface card) with a free 30-day trial of IPNetwork Monitor. Import MIBs, browse SNMP OIDs, create custom SNMP monitors, configure alerts, and monitor any SNMP-enabled network device from a single console.

Download ERI-DNX-T3-MIB