Nortel-MsCarrier-MscPassport-ExternalTimingDS1MIB

MIB Reference — IPNetwork Monitor · Updated October 06, 2026

All MIBs › Nortel-MsCarrier-MscPassport-ExternalTimingDS1MIB

Category: Circuit Emulation / TDM, Nortel MsCarrier MscPassport

Description: Provides SNMP objects for external DS1 timing source configuration on Nortel MsCarrier MscPassport switches.

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What Is Nortel-MsCarrier-MscPassport-ExternalTimingDS1MIB?

Nortel-MsCarrier-MscPassport-ExternalTimingDS1MIB is a vendor-specific MIB from Nortel Networks that models the external DS1 timing port(s) on a CPeD Control Processor within the MsCarrier MscPassport (Passport) carrier switching platform, where the mscLpEDS1 component controls up to two external timing ports supported only under Logical Processor 0. It defines mscLpEDS1ProvTable for provisioned line type, mscLpEDS1StateTable exposing the full ITU/telecom state model (mscLpEDS1AdminState, OperationalState, UsageState, AvailabilityStatus, ProceduralStatus, ControlStatus, AlarmStatus, StandbyStatus, UnknownStatus) for each timing component, and mscLpEDS1OperTable reporting live alarm conditions such as mscLpEDS1LosAlarm, mscLpEDS1LofAlarm, and mscLpEDS1RxAisAlarm. This detailed, standards-aligned state model lets an operator distinguish between a timing port that is administratively locked, one that has failed, and one that is simply on standby — critical for a component that supplies the network synchronization reference the rest of the Passport shelf depends on. It depends on the Nortel-MsCarrier-MscPassport-LogicalProcessorMIB for the mscLp/mscLpIndex objects it is nested under, and it is deployed on Nortel Passport carrier switches used in service-provider ATM/Frame Relay/voice networks. Engineers maintaining Passport timing infrastructure can download the Nortel-MsCarrier-MscPassport-ExternalTimingDS1MIB file for their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in Nortel-MsCarrier-MscPassport-ExternalTimingDS1MIB. 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

  • Nortel MsCarrier MscPassport (Passport) carrier switches, CPeD Control Processor

Monitoring Examples

An operator polls mscLpEDS1AlarmStatus and mscLpEDS1LosAlarm for a given mscLpEDS1 timing component under mscLp/0; an active Loss of Signal (LOS) alarm combined with mscLpEDS1AvailabilityStatus showing degraded indicates the external timing reference has been lost and the CPeD Control Processor may fail over to an alternate timing source.

What Can Be Monitored

  • external timing port admin/operational/usage state
  • loss-of-signal, loss-of-frame, and AIS alarm status
  • availability and standby status of timing components
  • provisioned DS1 line type
  • procedural and control status of the timing component
Imported Objects

From Nortel-MsCarrier-MscPassport-LogicalProcessorMIB

mscLpOBJECT-IDENTITY
mscLpIndexOBJECT-TYPE

From Nortel-MsCarrier-MscPassport-StandardTextualConventionsMIB

DisplayString
Integer32
RowStatus
StorageType

From Nortel-MsCarrier-MscPassport-UsefulDefinitionsMIB

mscPassportMIBsOBJECT-IDENTITY

From RFC-1212

OBJECT-TYPE
OIDs

RFC description

Management Information Base for Nortel MscPassport external timing synchronization using DS1 timing standards. Defines objects for monitoring and managing external clock references and timing synchronization on carrier-grade equipment.

Start monitoring Nortel MsCarrier MscPassport (Passport) carrier switch, CPeD Control Processor (external DS1 timing) 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 Nortel-MsCarrier-MscPassport-ExternalTimingDS1MIB