TN-CES-MIB

MIB Reference — IPNetwork Monitor · Updated October 06, 2026

All MIBs › TN-CES-MIB

Organization: Transition Networks, Inc.

Last Updated: 2015-11-25

Category: Circuit Emulation, Transition Networks Media Converters

Description: Manages Transition Networks media converter circuit emulation service provisioning and status.

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What Is TN-CES-MIB?

This is a Transition Networks proprietary MIB for its media-conversion/access product line, managing Circuit Emulation Service (CES), a technology that carries legacy TDM traffic transparently over a packet (Ethernet/IP) network. It exposes protocol configuration for the emulated circuit -- underlying transport type, UDP base port, SSRC checking, clock recovery algorithm/filter and its allowed maximum deviation -- plus event thresholds and notification objects. Its monitoring emphasis is on signal/clock integrity of the emulated circuit: the clock-recovery deviation and underrun objects directly reveal jitter-buffer underrun events and clock slip, which are the classic failure modes of TDM-over-packet circuits, and tnCesNotifications/tnCesEventId surface these as traps. As a device-specific MIB it doesn't lean on a broader standards MIB beyond generic SNMP conventions, though it parallels the general concept behind IETF pseudowire/CESoPSN work. It's typically deployed on Transition Networks media converters or NIDs providing TDM circuit emulation at the edge of a packet transport network. Network engineers evaluating or troubleshooting this functionality can download the TN-CES-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in TN-CES-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

  • Transition Networks media converter/NID (Circuit Emulation Service device)

Monitoring Examples

An operator monitors tnCesClockRecoveryAlgorithm and tnCesClockRecoveryMaxDeviation together to confirm the clock-recovery mechanism is staying within tolerance, and watches tnCesProtocolUnderrunFixed/tnCesProtocolUnderrunValue for jitter-buffer underrun counts that indicate the emulated TDM circuit is experiencing packet-network congestion or delay variation. When tnCesEventThreshold is crossed within a tnCesEventReportingInterval window, the device raises a notification via tnCesNotifications/tnCesEventId, alerting the operator to a circuit-emulation quality event such as excessive underruns or an SSRC mismatch (tnCesProtocolEnableSSRCChecking).

What Can Be Monitored

  • clock recovery deviation
  • jitter-buffer underrun count
  • event threshold crossings
  • SSRC checking status
  • UDP base port configuration
Imported Objects

From INET-ADDRESS-MIB

InetAddress
InetAddressType

From SNMPv2-CONF

MODULE-COMPLIANCE
NOTIFICATION-GROUP
OBJECT-GROUP

From SNMPv2-SMI

Counter32
Integer32
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

DateAndTime
DisplayString
MacAddress
TruthValue

From TRANSITION-SMI

tnProductsOBJECT-IDENTITY

How to Use in IPNetwork Monitor

Example using tnCesProcessorProtocolMatch1 OID:

Select a Transition Networks media converter/NID, Circuit Emulation Service device (clock-recovery/jitter-buffer status) as the target host to create a monitor — the SNMP service should be up and running on it. Click New Monitor, then check SNMP Custom on the Favorites tab, click Next, and confirm the host. On the next page, click Select... to open the built-in SNMP MIB Browser and type tnCesProcessorProtocolMatch1 into the Find box to locate it in the OID tree, then select it and click OK. The number of frames which hit protocol matching rule 1. On the monitor's Main parameters page you can set the target's SNMP port (default 161), credentials, polling interval, and other settings — see the SNMP Monitor help for details. On the State conditions and Alerting tabs, configure when the monitor should change state and trigger an alert; since this is a Counter32-type OID, Value bounds is the most useful condition here — trigger an alert if the counter increases sharply between polls relative to its normal baseline, since an unexpected spike often reflects a real change in traffic or activity. Click Finish to create the monitor; you can adjust any parameter later.
OIDs

RFC description

TANDBERG Networks Circuit Emulation Service (CES) management MIB for video and audio conferencing endpoints.

Start monitoring Transition Networks media converter/NID, Circuit Emulation Service device (clock-recovery/jitter-buffer status) 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 TN-CES-MIB