ATT-CNM-DS1-MIB

MIB Reference — IPNetwork Monitor · Updated October 05, 2026

All MIBs › ATT-CNM-DS1-MIB

Category: Vendor: AT&T

Description: Manages AT&T Customer Network Management objects for DS1/T1 circuits, covering performance statistics and alarm status.

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What Is ATT-CNM-DS1-MIB?

ATT-CNM-DS1-MIB is AT&T's Customer Network Management MIB for DS1/T1 circuits, used to expose performance statistics and alarm status for T1 lines delivered as part of AT&T-managed network services. It falls in the category of telecom-carrier performance and fault MIBs, covering circuit-level counters (such as errored seconds and severely errored seconds) alongside current and historical alarm/status indications. Its primary monitoring value is on the software/service status side rather than device hardware internals: it lets a customer or carrier operations team see whether a T1 circuit is in an alarm state (e.g. loss of signal, loss of frame) and how its error performance is trending. It builds directly on the DS1/E1 performance-monitoring model standardized in RFC 1406/2495 (the DS1-MIB), adapting it for AT&T's customer-facing network management interface. It is typically deployed by enterprise customers or NOC staff monitoring leased DS1/T1 circuits provided by AT&T for WAN connectivity. Engineers can download the ATT-CNM-DS1-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in ATT-CNM-DS1-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

  • AT&T-provisioned DS1/T1 circuit access equipment (CSU/DSU or router DS1 interface)

Monitoring Examples

No specific sample object names were provided for this module, so a concrete table walk cannot be honestly described, but based on its description an operator would typically poll DS1 performance-monitoring counters (errored seconds, severely errored seconds, unavailable seconds) and current alarm-state objects per circuit to detect degrading line quality or an active loss-of-signal/loss-of-frame condition on a T1 circuit.

What Can Be Monitored

  • DS1 circuit alarm status
  • errored seconds/severely errored seconds
  • loss of signal/loss of frame conditions
  • circuit performance history
Imported Objects

From RFC-1212

OBJECT-TYPE

From RFC1155-SMI

Gauge
enterprises

From RFC1213-MIB

DisplayString
OIDs

RFC description

AT&T DS1 customer network management for DS1 interface configuration, status, and error monitoring.

Start monitoring AT&T Customer Network Management (CNM) DS1/T1 circuit equipment (legacy) 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 ATT-CNM-DS1-MIB