AP553LIU-MIB

MIB Reference — IPNetwork Monitor · Updated September 14, 2026

All MIBsAP553LIU-MIB

Category: Wireless and WLAN

Description: Aironet/Telco AP553 Line Interface Unit management for wired uplink configuration.

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What Is AP553LIU-MIB?

AP553LIU-MIB is a vendor-specific MIB from General DataComm (GDC) for the Innovx AP553 Access Probe Line Interface Unit, modeling the T1/E1 Line Interface Unit (LIU) subsystem's configuration, alarming, diagnostics, and error statistics under the liuGroup subtree imported from INNOVX-CORE-MIB. It defines administrative and CSU/DSU configuration groups (liuCsuNetCfg, liuDsuCfg covering framing, line coding, DS0 allocation), alarm-threshold configuration for bipolar violations, CRC errors, and loss-of-frame/AIS/LOS/OOF conditions (ap553NetBpvTrapSeverity/Window/Thresh, ap553NetCrcTrapSeverity/Window/Thresh, ap553NetLadTrapSeverity/Window/Thresh), diagnostics (ap553DiagT1Test, ap553DiagTestStatus), and current/total/history error-second counters (ap553CurrentErroredSeconds, ap553CurrentBipolarViolationsErrors, ap553CurrentLossOfSignalErrors, ap553TotalCrcErrors, and their Total/History equivalents). It depends on INNOVX-CORE-MIB for the parent liuGroup OID and for shared objects like DS0 formatting, and it complements companion Innovx MIBs covering DTE and cascade interfaces. It is deployed on GDC Innovx Access Probe network-monitoring/test units used to characterize T1/E1 circuit quality, and administrators can download the AP553LIU-MIB file to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in AP553LIU-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

  • General DataComm (GDC) Innovx AP553 Access Probe Line Interface Unit

Monitoring Examples

An operator polls ap553CurrentBipolarViolationsErrors and ap553CurrentCrcErrors against the configured ap553NetBpvThresh/CrcThresh windows; a current-interval error count exceeding threshold, paired with ap553CurrentSeverelyErroredSeconds climbing, would indicate a degrading T1/E1 line requiring a carrier circuit trouble ticket.

What Can Be Monitored

  • T1/E1 line configuration (framing, coding, DS0 allocation)
  • bipolar violation (BPV) error counters and thresholds
  • CRC error counters and thresholds
  • loss-of-frame/AIS/LOS/OOF alarm status and severities
  • current/total/history errored-seconds statistics
  • line diagnostic test status
Imported Objects

From INNOVX-CORE-MIB

liuGroupOBJECT-IDENTITY

From RFC-1212

OBJECT-TYPE

From RFC1155-SMI

Gauge

From RFC1213-MIB

DisplayString
OIDs

RFC description

Vendor-private MIB for AP553LIU access point equipment; manages wireless interfaces, power supply, and status monitoring on this specific access point model.

Start monitoring General DataComm (GDC) Innovx AP553 Access Probe LIU (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 AP553LIU-MIB