A4400-RTM-MIB

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Category: Device Management, Vendor: 3Com

Description: Manages the Real-Time Monitor (RTM) on the 3Com/USR NetServer 4400, providing WAN connection status and performance metrics for remote access calls.

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What Is A4400-RTM-MIB?

This MIB implements the Real-Time Monitor (RTM) for the 3Com/U.S. Robotics NetServer 4400 remote-access platform, a dial-up/WAN access concentrator. It exposes live resource and call-session data: IP domain configuration, conference-resource availability/busy/out-of-order counts, DSP (digital signal processor) resource availability/busy/out-of-service/overrun counts, and call-admission-control (CAC) allowed/used counts. This is a strong hardware-resource and performance monitoring MIB: the DSP and conference-resource counters directly reflect the health and utilization of the device's onboard hardware handling incoming calls, letting an operator detect resource exhaustion, hardware failures (out-of-service DSPs), or overrun conditions before they cause call-setup failures. It shows no strong dependency on external standard MIBs, being a largely self-contained vendor RTM extension. It's deployed on 3Com/USR NetServer 4400 remote-access servers terminating dial-up/WAN connections. Engineers can download the A4400-RTM-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in A4400-RTM-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

3Com/USR NetServer 4400 remote access server

Monitoring Examples

An operator would poll dspRessAvailable against dspRessBusy and dspRessOutOfService to determine whether the device has enough healthy DSP resources to handle incoming call volume, with a rising dspRessOverrun count indicating the box is being overwhelmed. Checking cacUsed against cacAllowed shows how close the system is to its call-admission-control ceiling, while confAvailable/confBusy/confOutOfOrder reveals conference-resource health and capacity for multi-party calls.

What Can Be Monitored

DSP resource availability/busy/out-of-service/overrun counts
conference resource availability/busy/out-of-order counts
call admission control allowed vs used
IP domain configuration

Imported Objects

From A4400-CPU-MIB

a4400CPU

OBJECT-IDENTITY

From RFC-1212

OBJECT-TYPE

From RFC1155-SMI

enterprises

How to Use in IPNetwork Monitor

Example using pbxRole OID:

Select a 3Com/USR NetServer 4400 access platform (legacy) 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 pbxRole into the Find box to locate it in the OID tree, then select it and click OK. The PBX role. 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 an INTEGER-type OID, Value bounds is the most useful condition here — trigger an alert if the value is 'INDETERMINATE', or it changes between MAIN/STAND-BY/ACTIVE-PCS/INACTIVE-PCS unexpectedly, since which role is correct for this PBX depends on your redundancy configuration and an unplanned change often indicates a failover. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
ipDomainTable	1.3.6.1.4.1.637.64.4400.1.3		read-only	Table for IP Domains.
ipDomainEntry	1.3.6.1.4.1.637.64.4400.1.3.1		read-only
INT ipDomain	1.3.6.1.4.1.637.64.4400.1.3.1.1	INTEGER	read-only	IP Domain number as found in MAO.
INT confAvailable	1.3.6.1.4.1.637.64.4400.1.3.1.2	INTEGER	read-only	Conference circuits available for given IP Domain
INT confBusy	1.3.6.1.4.1.637.64.4400.1.3.1.3	INTEGER	read-only	Conference circuits busy for given IP Domain
INT confOutOfOrder	1.3.6.1.4.1.637.64.4400.1.3.1.4	INTEGER	read-only	Conference circuits out of order for given IP Domain
INT dspRessAvailable	1.3.6.1.4.1.637.64.4400.1.3.1.5	INTEGER	read-only	Compressors available for given IP Domain
INT dspRessBusy	1.3.6.1.4.1.637.64.4400.1.3.1.6	INTEGER	read-only	Compressors busy for given IP Domain
INT dspRessOutOfService	1.3.6.1.4.1.637.64.4400.1.3.1.7	INTEGER	read-only	Compressors out of order for given IP Domain
INT dspRessOverrun	1.3.6.1.4.1.637.64.4400.1.3.1.8	INTEGER	read-only	Cumulated compressors overrun for given IP Domain
INT cacAllowed	1.3.6.1.4.1.637.64.4400.1.3.1.9	INTEGER	read-only	Number of allowed external communications for given IP Domain
INT cacUsed	1.3.6.1.4.1.637.64.4400.1.3.1.10	INTEGER	read-only	Current number of external communications for given IP Domain
INT cacOverrun	1.3.6.1.4.1.637.64.4400.1.3.1.11	INTEGER	read-only	Cumulated CAC overrun since system startup for given IP Domain
INT pbxRoleEx	1.3.6.1.4.1.637.64.4400.1.4	INTEGER	read-only	The PBX role.
INT sipRegSets	1.3.6.1.4.1.637.64.4400.1.5	INTEGER	read-only	Registered SIP sets.
INT sipUnregSets	1.3.6.1.4.1.637.64.4400.1.6	INTEGER	read-only	Unregistered SIP sets.
INT setsInService	1.3.6.1.4.1.637.64.4400.1.7	INTEGER	read-only	Number of sets in service.
INT setsOutOfService	1.3.6.1.4.1.637.64.4400.1.8	INTEGER	read-only	Number of sets out of service.
trunkTable	1.3.6.1.4.1.637.64.4400.1.9		read-only	Table for Trunks.
trunkEntry	1.3.6.1.4.1.637.64.4400.1.9.1		read-only
INT trunkid	1.3.6.1.4.1.637.64.4400.1.9.1.1	INTEGER	read-only	Trunk number as found in MAO.
STR trunkname	1.3.6.1.4.1.637.64.4400.1.9.1.2	DisplayString	read-only	Name of the Trunk as found in MAO.
INT crystalno	1.3.6.1.4.1.637.64.4400.1.9.1.3	INTEGER	read-only	Crystal number as found in MAO
INT couplerno	1.3.6.1.4.1.637.64.4400.1.9.1.4	INTEGER	read-only	Coupler number as found in MAO
INT trunktype	1.3.6.1.4.1.637.64.4400.1.9.1.5	INTEGER	read-only	Type of the Trunk as found in MAO
INT nodepbx	1.3.6.1.4.1.637.64.4400.1.9.1.6	INTEGER	read-only	Node number where the trunk exists
INT freechan	1.3.6.1.4.1.637.64.4400.1.9.1.7	INTEGER	read-only	Available free channnels for given Trunk
INT busychan	1.3.6.1.4.1.637.64.4400.1.9.1.8	INTEGER	read-only	Used (Busy) channnels for given Trunk
INT ooschan	1.3.6.1.4.1.637.64.4400.1.9.1.9	INTEGER	read-only	Out Of Service channnels for given Trunk
INT trunkstatus	1.3.6.1.4.1.637.64.4400.1.9.1.10	INTEGER	read-only	Status of the trunk group.
INT cumuloos	1.3.6.1.4.1.637.64.4400.1.9.1.11	INTEGER	read-only	Cummulated Number of OOS Channels
INT cumuloverrun	1.3.6.1.4.1.637.64.4400.1.9.1.12	INTEGER	read-only	Cumulated Number of failed outgoing calls (oos/hs)

RFC description

Real-time monitoring of Alcatel-Lucent OXE conference circuits and IP domain resource allocation.

Start monitoring 3Com/USR NetServer 4400 access platform (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 A4400-RTM-MIB