Nortel-MsCarrier-MscPassport-CircuitEmulationServiceMIB

MIB Reference — IPNetwork Monitor · Updated October 06, 2026

All MIBs › Nortel-MsCarrier-MscPassport-CircuitEmulationServiceMIB

Category: Circuit Emulation / TDM, Nortel MsCarrier MscPassport

Description: Defines SNMP objects for circuit emulation service (CES) configuration and performance on Nortel MsCarrier MscPassport.

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What Is Nortel-MsCarrier-MscPassport-CircuitEmulationServiceMIB?

This Nortel MsCarrier MscPassport MIB defines SNMP objects for Circuit Emulation Service (CES) over AAL1/ATM, which emulates traditional TDM circuits across an ATM backbone on the Passport switch. It exposes provisioning tables for CES components, including customer identifier (CID) data for billing/tenant tracking and network access point (NAP) provisioning parameters for each emulated circuit. Monitoring is chiefly about verifying that emulated circuits remain provisioned and active (row status) and correctly associated with the right customer, which is important since a CES circuit failure directly manifests as loss of the emulated TDM service (e.g., a T1/E1 leased line) to the end customer. It builds on the ATM Forum's AAL1 circuit emulation specification and Nortel's shared Passport component-provisioning framework. It is deployed by carriers using Passport ATM switches to offer emulated leased-line (TDM) services over an ATM core network. Network engineers evaluating or troubleshooting this functionality can download the Nortel-MsCarrier-MscPassport-CircuitEmulationServiceMIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in Nortel-MsCarrier-MscPassport-CircuitEmulationServiceMIB. 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 ATM switch

Monitoring Examples

An engineer would check mscAal1CesRowStatusTable/mscAal1CesRowStatusEntry to confirm a CES circuit remains active, and review mscAal1CesCidDataTable for the mscAal1CesCustomerIdentifier bound to that circuit to validate customer/service mapping. Inspecting mscAal1CesProvTable/mscAal1CesProvEntry alongside mscAal1CesNap entries helps confirm the network access point provisioning underlying the emulated circuit is correct. Since no cell-loss or jitter counters are listed among sample objects, day-to-day monitoring here is largely provisioning-state verification rather than live QoS metrics.

What Can Be Monitored

  • CES circuit row status
  • customer identifier binding
  • network access point provisioning
  • circuit component storage type
Imported Objects

From Nortel-MsCarrier-MscPassport-StandardTextualConventionsMIB

Counter32
DisplayString
Gauge32
Integer32
RowPointer
RowStatus
StorageType
Unsigned32

From Nortel-MsCarrier-MscPassport-TextualConventionsMIB

AsciiString
EnterpriseDateAndTime
FixedPoint2
Hex
IntegerSequence
Link
NonReplicated
PassportCounter64

From Nortel-MsCarrier-MscPassport-UsefulDefinitionsMIB

mscComponentsOBJECT-IDENTITY
mscPassportMIBsOBJECT-IDENTITY

From RFC-1212

OBJECT-TYPE
OIDs

RFC description

Circuit Emulation Service (CES) for Nortel MscPassport. Manages AAL1 and AAL5 CES instances for constant bit rate services.

Start monitoring Nortel MsCarrier MscPassport ATM switch (AAL1 Circuit Emulation Service) 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-CircuitEmulationServiceMIB