A3COM-HUAWEI-DSP-MIB

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Organization: Hangzhou H3C Technologies Co., Ltd.

Last Updated: 2008-01-16

Category: Telephony and VoIP, Vendor: H3C/HH3C

Description: Monitors DSP resource utilization, channel allocation, and fault status for voice processing on H3C devices.

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What Is A3COM-HUAWEI-DSP-MIB?

A3COM-HUAWEI-DSP-MIB (jointly branded 3Com/Huawei, deployed on H3C devices) defines objects for monitoring Digital Signal Processor (DSP) resources used for voice-processing functions such as voice gateways or media processing on H3C routers/switches. It exposes per-VPM (Voice Processing Module) and per-DSP status, including operational state, resource-utilization percentage, high-water-mark utilization, and maximum channel capacity, plus DSP-specific trap objects. This is a clear hardware/resource health MIB: it lets an administrator monitor how heavily DSP channels are loaded and detect a VPM approaching its maximum channel capacity, which would cause new voice calls to fail. It depends on the device's physical entity indexing (h3cVPMEnPhysicalIndex) to correlate a DSP/VPM to a physical slot, tying it to the standard ENTITY-MIB model. It is deployed on H3C voice-gateway-capable routers/switches handling VoIP or TDM-to-IP voice trunking. Network engineers evaluating or troubleshooting this functionality can download the A3COM-HUAWEI-DSP-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in A3COM-HUAWEI-DSP-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

H3C (3Com/Huawei) voice-gateway router/switch with DSP/VPM modules

Monitoring Examples

An administrator would poll h3cVPMResourceUtilization and h3cVPMHiWaterUtilization in h3cVPMStatusTable to see current and peak DSP channel usage against h3cVPMMaxChannel, revealing when a voice module is nearing capacity. h3cVPMState would be checked to confirm the voice processing module is operationally up rather than failed or disabled. h3cDSPStatusTable's h3cDSPTrap object surfaces DSP-level fault events, such as a specific DSP chip going out of service, that would explain localized call-quality or call-failure issues.

What Can Be Monitored

DSP/VPM operational state
DSP resource utilization percentage
high-water-mark utilization
maximum voice channel capacity
DSP fault trap events

Imported Objects

From A3COM-HUAWEI-OID-MIB

h3cCommon

OBJECT-IDENTITY

From ENTITY-MIB

PhysicalIndex

From SNMPv2-SMI

Integer32
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE
TimeTicks

How to Use in IPNetwork Monitor

Example using h3cVPMState OID:

Select an H3C voice gateway 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 h3cVPMState into the Find box to locate it in the OID tree, selecting the specific row/instance you want to monitor since this is a table column, then select it and click OK. The object indicates the current state of VPM card being monitored. normal(1) - VPM card in normal condition. warning(2) - VPM card has some problem and need attention. fatal(3) - VPM card is not functional. offLine(4) - VPM card is in off-line. 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 anything other than 'normal', since that indicates the condition this object reports has changed to one worth investigating. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
h3cDSP	1.3.6.1.4.1.43.45.1.10.2.89			This MIB is to provide the definition of the DSP(Digital Signal Processing) status.
h3cVPMStatusTable	1.3.6.1.4.1.43.45.1.10.2.89.1		not-accessible	The table contains status parameters of VPM(Voice Process Module) card.
h3cVPMStatusEntry	1.3.6.1.4.1.43.45.1.10.2.89.1.1		not-accessible	The entry of VPM status table.
I32 h3cVPMIndex	1.3.6.1.4.1.43.45.1.10.2.89.1.1.1	Integer32	accessible-for-notify	The index for this entry. The sequence of VPM card in the chassis is from the top to bottom.
PHY h3cVPMEnPhysicalIndex	1.3.6.1.4.1.43.45.1.10.2.89.1.1.2	PhysicalIndex	read-only	The object corresponds to PhysicalIndex in the chassis.
INT h3cVPMStateEx	1.3.6.1.4.1.43.45.1.10.2.89.1.1.3	INTEGER	read-only	The object indicates the current state of VPM card being monitored. normal(1) - VPM card in normal condition. warning(2) - VPM card has some problem and need attention. fatal(3) - VPM card is not functional. offLine(4) - VPM card is in off-line maintenance state.
I32 h3cVPMResourceUtilization	1.3.6.1.4.1.43.45.1.10.2.89.1.1.4	Integer32	read-only	The object indicates the percentage of current DSP resource utilization of the VPM card. The utilization is a ratio of number of busy DSP resources (for handling calls, transcoding, voice compression,...) to the total available DSP resources.
I32 h3cVPMHiWaterUtilization	1.3.6.1.4.1.43.45.1.10.2.89.1.1.5	Integer32	read-only	The object indicates the highest percentage of DSP resource utilization of the VPM card that have been occured.
I32 h3cVPMMaxChannel	1.3.6.1.4.1.43.45.1.10.2.89.1.1.6	Integer32	read-only	The maximum number of channels can be supported in each VPM card.
h3cDSPStatusTable	1.3.6.1.4.1.43.45.1.10.2.89.2		not-accessible	The table contains status parameters of DSP(Digital Signal Processing) card.
h3cDSPStatusEntry	1.3.6.1.4.1.43.45.1.10.2.89.2.1		not-accessible	The entry of DSP status table.
I32 h3cDSPIndex	1.3.6.1.4.1.43.45.1.10.2.89.2.1.1	Integer32	accessible-for-notify	The index for this entry. DSP is fixed on VPM card or chassis card. The sequence of DSP in the VPM card or chassis card is from right to left.
I32 h3cDSPVPMIndex	1.3.6.1.4.1.43.45.1.10.2.89.2.1.2	Integer32	read-only	The object corresponds to VPMIndex in the chassis. If value of this object is non-zero, it is the index of VPM card.(DSP is in this VPM card.) If value of this object is 0, then the DSP is fixed in the chassis card.
PHY h3cDSPEnPhysicalIndex	1.3.6.1.4.1.43.45.1.10.2.89.2.1.3	PhysicalIndex	read-only	The object corresponds to PhysicalIndex in the chassis.
TIK h3cDSPResetTime	1.3.6.1.4.1.43.45.1.10.2.89.2.1.4	TimeTicks	read-only	The value of sysUpTime from the last DSP reset occurred.
I32 h3cDSPMaxChannel	1.3.6.1.4.1.43.45.1.10.2.89.2.1.5	Integer32	read-only	The maximum number of channels can be supported in each DSP. The value is chosen in an implementation-dependent manner by the DSP functionality.
INT h3cDSPState	1.3.6.1.4.1.43.45.1.10.2.89.2.1.6	INTEGER	read-only	The object indicates the current state of DSP being monitored. normal(1) - DSP in normal condition. fatal(3) - DSP is not functional. offLine(4) - DSP is in off-line maintenance state.
I32 h3cDSPInUseChannel	1.3.6.1.4.1.43.45.1.10.2.89.2.1.7	Integer32	read-only	The number of channels that are reserved for serving calls. The value is incremented when the DSP channel is reserved for call setup and is decremented after the DSP channel is free due to call disconnection.
h3cDSPTrap	1.3.6.1.4.1.43.45.1.10.2.89.3
h3cDSPTrapPrex	1.3.6.1.4.1.43.45.1.10.2.89.3.0
NTF h3cVPMStateChange	1.3.6.1.4.1.43.45.1.10.2.89.3.0.1			This trap is sent when VPM state changes.
NTF h3cDSPStateChange	1.3.6.1.4.1.43.45.1.10.2.89.3.0.2			This trap is sent when DSP state changes.

RFC description

H3C DSP (Digital Signal Processing) module status and VPM (Voice Process Module) card monitoring for voice systems.

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Download A3COM-HUAWEI-DSP-MIB