Nortel-MsCarrier-MscPassport-DcmeMIB

MIB Reference — IPNetwork Monitor · Updated October 06, 2026

All MIBs › Nortel-MsCarrier-MscPassport-DcmeMIB

Category: Nortel MsCarrier MscPassport, Voice & Telephony

Description: Provides SNMP objects for Digital Circuit Multiplication Equipment (DCME) voice compression on Nortel MsCarrier MscPassport.

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What Is Nortel-MsCarrier-MscPassport-DcmeMIB?

This MIB manages Digital Circuit Multiplication Equipment (DCME) voice compression on the Nortel MSC Passport mobile carrier switch, used to compress multiple voice channels onto fewer trunk circuits. It exposes mscDcmeProvTable with mscDcmePreestablishedConnections (reserved channels) and mscDcmeTrmThreshold, a transient-rate-monitor threshold governing when the compression profile throttles under load. Monitoring here is directly about voice-trunk load and quality risk: tracking how close a DCME component is running to its compression threshold reveals whether voice trunks are oversubscribed, a leading indicator of audible call-quality degradation. It depends on ITU-T DCME/ADPCM voice-compression standards and the shared Passport component/RowStatus conventions. It is deployed on MSC Passport trunks carrying compressed voice traffic over bandwidth-constrained carrier links. Engineers can download the Nortel-MsCarrier-MscPassport-DcmeMIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in Nortel-MsCarrier-MscPassport-DcmeMIB. 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 MSC Passport mobile carrier switch
  • DCME voice compression trunk card

Monitoring Examples

An operator reviews mscDcmeProvTable/mscDcmeProvEntry to check mscDcmePreestablishedConnections and mscDcmeTrmThreshold, which governs when the DCME compression profile throttles or degrades under overload. mscDcmeProfile objects define which compression profile is applied to a given DCME component. A DCME component regularly approaching or exceeding its mscDcmeTrmThreshold indicates the voice trunk is oversubscribed, risking audible quality degradation on active calls.

What Can Be Monitored

  • preestablished connection count
  • compression threshold (TRM) status
  • DCME profile assignment
  • component row status
Imported Objects

From Nortel-MsCarrier-MscPassport-StandardTextualConventionsMIB

Counter32
DisplayString
Gauge32
Integer32
RowPointer
RowStatus
StorageType
Unsigned32

From Nortel-MsCarrier-MscPassport-TextualConventionsMIB

AsciiString
DigitString
EnterpriseDateAndTime
FixedPoint1
Hex
Link
NonReplicated
PassportCounter64

From Nortel-MsCarrier-MscPassport-UsefulDefinitionsMIB

mscComponentsOBJECT-IDENTITY
mscPassportMIBsOBJECT-IDENTITY

From RFC-1212

OBJECT-TYPE
OIDs

RFC description

Manages Digital Circuit Multiplication Equipment connections on Nortel MscPassport platforms.

Start monitoring Nortel MSC Passport mobile carrier switch (DCME voice compression trunk) 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-DcmeMIB