CXT1E1-MIB

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Category: Network Interfaces, Vendor: Aastra

Description: Manages T1/E1 interface configuration and status for Aastra/ConvertedX WAN equipment.

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What Is CXT1E1-MIB?

CXT1E1-MIB is a vendor-specific SNMP module for Aastra/ConvertedX (CXT) WAN access equipment, covering the configuration and physical-layer status of T1 and E1 digital trunk interfaces. It defines a configuration table (t1e1CfgTable/t1e1CfgEntry) keyed by link index, holding parameters such as debounce timing, jitter attenuator mode, synchronization criteria, and T1 receive equalizer gain/level settings. Its monitoring emphasis is hardware line-status and signal-quality: objects like t1e1CfgT1RxLevel and t1e1CfgT1RxEqualizerGainLimit reflect received signal strength and equalization, while t1e1CfgT1FrameAlignmentChange and t1e1CfgT1JitterAttenuatorTrip flag frame-sync loss and jitter-buffer trip events that indicate a failing or marginal T1/E1 span. As a T1/E1 line MIB it commonly complements the standard IETF DS1/E1 MIB (RFC 2495/2496) for full alarm and performance-counter coverage. It is typically deployed on WAN edge or access routers/multiplexers terminating leased-line T1/E1 circuits. Engineers can download the CXT1E1-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in CXT1E1-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

Aastra/ConvertedX (CXT) WAN router or multiplexer
T1/E1 access equipment

Monitoring Examples

An operator troubleshooting a noisy leased line would poll t1e1CfgLinkIndex to select the affected span, then check t1e1CfgT1RxLevel and t1e1CfgT1RxEqualizerGainLimit for abnormal receive-signal levels, and t1e1CfgSyncCriteria alongside t1e1CfgT1FrameAlignmentChange to see if the link is losing frame synchronization. A rising t1e1CfgT1JitterAttenuatorTrip count combined with a t1e1CfgDebounce-qualified alarm would indicate clock jitter severe enough to require carrier escalation. These objects give configuration context as well as line-quality signals for the T1/E1 circuit.

What Can Be Monitored

T1/E1 receive signal level
equalizer gain limit
synchronization criteria/status
frame alignment change events
jitter attenuator trip events
debounce timing configuration

Imported Objects

From CXProduct-SMI

cxT1E1

OBJECT-IDENTITY

From RFC-1212

OBJECT-TYPE

From RFC1155-SMI

TimeTicks

OIDs

OID symbolic	OID numeric	Type	Access	Description
t1e1CfgTable	1.3.6.1.4.1.495.2.1.8.2.10		not-accessible	The T1/E1 configuration table.
t1e1CfgEntry	1.3.6.1.4.1.495.2.1.8.2.10.1		not-accessible	An entry in the T1/E1 configuration table.
INT t1e1CfgLinkIndex	1.3.6.1.4.1.495.2.1.8.2.10.1.1	INTEGER	read-only	Identifies the physical port with the T1/E1 (t1e1) interface. Range of Values: 1 - 2 Default Value: None Configuration Changed: administrative
INT t1e1CfgDebounce	1.3.6.1.4.1.495.2.1.8.2.10.1.10	INTEGER	read-write	Specifies the number of loops needed for debouncing. Warning: This is a Private Mode activity that should only be performed by or under the direct supervision of qualified personnel. Range of Values: 1 - 255 Default Value: 2 Configuration Changed: administrative
INT t1e1CfgJitterAttenuator	1.3.6.1.4.1.495.2.1.8.2.10.1.11	INTEGER	read-write	Defines the position and buffer depth of the Jitter Attenuator when the Attenuator is enabled. Warning: This is a Private Mode activity that should only be performed by or under the direct supervision of qualified personnel. Options: t1e1NoJitterAttenuator (1) t1e1RxAttenuator32Bits (2) t1e1RxAttenuator128Bits (3) t1e1TxAttenuator32Bits (4) t1e1TxAttenuator128Bits (5) Default Value: t1e1NoJitterAttenuator (1) Configuration Changed: administrative
INT t1e1CfgSyncCriteria	1.3.6.1.4.1.495.2.1.8.2.10.1.12	INTEGER	read-write	Determines the criteria used for Synchronisation. Options: In D4 framing mode, 1 = search for Ft pattern, the search for Fs pattern and 2=cross couple Ft and Fs pattern. In ESF framing mode, 1 = search for FPS pattern only. In ESF framing mode, 2 = search for FPS and verify with CRC6. Warning: This is a Private Mode activity that should only be performed by or under the direct supervision of qualified personnel. Default Value: 1 Configuration Changed: administrative
INT t1e1CfgT1RxEqualizerGainLimit	1.3.6.1.4.1.495.2.1.8.2.10.1.13	INTEGER	read-write	Program the receiver sensitivity. Warning: This is a Private Mode activity that should only be performed by or under the direct supervision of qualified personnel. Options: t1e1EGLLow (1): Program a low sensitivity of -30 dB. This is recommended for most applications. t1e1EGLHigh (2): Program a high sensitivity of -36 dB. This setting could be required for particular applications, however, with this level of sensitivity the receiver will be more susceptible to crosstalk and the receiver's jitter tolerance will suffer. Default Value: t1e1EGLLow (1) Configuration Changed: administrative
INT t1e1CfgT1RxLevel	1.3.6.1.4.1.495.2.1.8.2.10.1.50	INTEGER	read-only	Indicates in real-time a range of received signal levels. Options: 1: +2.0 to -7.5 dB 2: -7.5 to -15.0 dB 3: -15.0 to -22.5 dB 4: less than -22.5 dB
TIK t1e1CfgT1FrameAlignmentChange	1.3.6.1.4.1.495.2.1.8.2.10.1.51	TimeTicks	read-only	Indicates the most recent time at which a resynchronization resulted in a change of frame or multiframe alignment. If no such event has occurred since system startup, then the value will be zero.
TIK t1e1CfgT1JitterAttenuatorTrip	1.3.6.1.4.1.495.2.1.8.2.10.1.52	TimeTicks	read-only	Indicates the most recent time that the jitter attenuator FIFO reached within 4-bits of it's limit on this line interface. If no such event has occurred since system startup, then the value will be zero.

RFC description

Ciena/Cerent CXT platform MIB for E1 line card and interface management; vendor-private.

Start monitoring Aastra/ConvertedX (CXT) WAN router/multiplexer (T1/E1 line interface) 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 CXT1E1-MIB

What Is CXT1E1-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description