A3COM-HUAWEI-VOICE-CALL-ACTIVE-MIB

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Organization: Hangzhou H3C Technologies Co., Ltd.

Last Updated: 2008-02-17

Category: Telephony and VoIP, Vendor: H3C/HH3C

Description: Monitors currently active voice calls on H3C/3Com devices with detailed per-connection information including codec negotiation, jitter, and packet loss metrics.

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What Is A3COM-HUAWEI-VOICE-CALL-ACTIVE-MIB?

A3COM-HUAWEI-VOICE-CALL-ACTIVE-MIB is a joint 3Com/H3C-Huawei enterprise MIB (from the former 3Com-Huawei/H3C joint venture) that exposes real-time records for currently active voice calls on VoIP-capable H3C/3Com devices. It falls into the voice/VoIP performance-monitoring category, detailing per-call connection records for both traditional voice/fax calls and VoIP call legs. Its monitoring emphasis is on live call-quality and software service status — per-connection duration and codec negotiation, and by extension the audio quality experienced on each active call — functioning as a real-time voice-quality health check rather than hardware sensor data. It is layered on the vendor's broader H3C/3Com voice MIB tree and complements standard telephony/VoIP MIBs used elsewhere in the network. It is typically deployed on H3C/3Com voice gateways or VoIP-enabled routers/switches in enterprise unified-communications deployments where call quality needs real-time visibility. Engineers can download the A3COM-HUAWEI-VOICE-CALL-ACTIVE-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in A3COM-HUAWEI-VOICE-CALL-ACTIVE-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 voice gateway or VoIP-enabled router/switch

Monitoring Examples

An operator would poll the h3cVoiceCallActiveTable/h3cVoiceCallActiveEntry, keyed by h3cVoCallActiveConnectionId, to check h3cVoCallActiveTxDuration, h3cVoCallActiveVoiceTxDuration, or h3cVoCallActiveFaxTxDuration alongside h3cVoCallActiveCoderType for an active call. For VoIP-specific legs, the parallel h3cVoiceVoIPCallActiveTable/h3cVoiceVoIPCallActiveEntry keyed by h3cVoVoIPCallActiveConnectionId would be walked to identify a call using an unexpectedly low-quality h3cVoCallActiveCoderType or an abnormally long h3cVoCallActiveFaxTxDuration, revealing a stuck fax session or codec misnegotiation.

What Can Be Monitored

active voice/fax call duration
codec type in use per call
active VoIP call connections
fax transmission duration

Imported Objects

From A3COM-HUAWEI-OID-MIB

h3cVoice

OBJECT-IDENTITY

From A3COM-HUAWEI-VOICE-DIAL-CONTROL-MIB

H3cCodecType

From DIAL-CONTROL-MIB

callActiveIndex	OBJECT-TYPE
callActiveSetupTime	OBJECT-TYPE

From INET-ADDRESS-MIB

InetAddress
InetAddressType

From SNMPv2-SMI

Gauge32
Integer32
MODULE-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

TEXTUAL-CONVENTION

How to Use in IPNetwork Monitor

Example using h3cVoCallActiveTxDuration OID:

Select an H3C/3Com 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 h3cVoCallActiveTxDuration 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. It reports the duration of transmit path open from this peer to the voice gateway for the call. 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 Gauge32-type OID, Value bounds is the most useful condition here — trigger an alert if the duration grows beyond what you'd expect for a transient condition, since a long-running duration often points to a stuck or ongoing problem. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
h3cVoCallActive	1.3.6.1.4.1.43.45.1.10.2.39.15			This MIB file is to provide the definition of voice call active record information.
h3cVoiceCallActiveObjects	1.3.6.1.4.1.43.45.1.10.2.39.15.1
h3cVoiceCallActiveTable	1.3.6.1.4.1.43.45.1.10.2.39.15.1.1		not-accessible	This table is the voice extension to the call active table of DIAL-CONTROL-MIB. It contains voice encapsulation call leg information that is derived from the statistics of lower layer telephony interface.
h3cVoiceCallActiveEntry	1.3.6.1.4.1.43.45.1.10.2.39.15.1.1.1		not-accessible	The information regarding a single voice encapsulation call leg. The call leg entry is identified by using the same index objects that are used by call active table of DIAL-CONTROL-MIB to identify the call. An entry of this table is created when its associated call active entry in the DIAL-CONTROL-MIB is created and call active entry contains the call establishment to a voice over telephony network peer. The entry is deleted when its associated call active entry in the DIAL-CONTROL-MIB is deleted.
H3C h3cVoCallActiveConnectionId	1.3.6.1.4.1.43.45.1.10.2.39.15.1.1.1.1	H3cGUid	read-only	The global call identifier for the gateway call.
G32 h3cVoCallActiveTxDurationEx	1.3.6.1.4.1.43.45.1.10.2.39.15.1.1.1.2	Gauge32	read-only	Duration of transmit path open from this peer to the voice gateway for the call. The units is milliseconds.
G32 h3cVoCallActiveVoiceTxDuration	1.3.6.1.4.1.43.45.1.10.2.39.15.1.1.1.3	Gauge32	read-only	Duration of voice transmitted from this peer to voice gateway for this call. The voice utilization rate can be obtained by dividing this by h3cVoCallActiveTXDuration object. The units is milliseconds.
G32 h3cVoCallActiveFaxTxDuration	1.3.6.1.4.1.43.45.1.10.2.39.15.1.1.1.4	Gauge32	read-only	Duration of fax transmitted from this peer to voice gateway for this call. The fax utilization rate can be obtained by dividing this by h3cVoCallActiveTXDuration object. The units is milliseconds.
H3C h3cVoCallActiveCoderType	1.3.6.1.4.1.43.45.1.10.2.39.15.1.1.1.5	H3cCodecType	read-only	The negotiated coder type. It specifies the encode type to the PSTN leg of a call.
G32 h3cVoCallActiveImgPageCount	1.3.6.1.4.1.43.45.1.10.2.39.15.1.1.1.6	Gauge32	read-only	The number of fax related image pages are received or transmitted via the peer for the call. The units is pages.
h3cVoiceVoIPCallActiveTable	1.3.6.1.4.1.43.45.1.10.2.39.15.1.2		not-accessible	This table is the VoIP extension to the call active table of DIAL-CONTROL-MIB. It contains VoIP call leg information about specific VoIP call destination.
h3cVoiceVoIPCallActiveEntry	1.3.6.1.4.1.43.45.1.10.2.39.15.1.2.1		not-accessible	The information regarding a single VoIP call leg. The call leg entry is identified by using the same index objects that are used by call active table of DIAL-CONTROL-MIB to identify the call. An entry of this table is created when its associated call active entry in the DIAL-CONTROL-MIB is created and the call active entry contains information for the call establishment to the peer on the IP backbone via a voice over IP peer. The entry is deleted when its associated call active entry in the DIAL-CONTROL-MIB is deleted.
H3C h3cVoVoIPCallActiveConnectionId	1.3.6.1.4.1.43.45.1.10.2.39.15.1.2.1.1	H3cGUid	read-only	The global call identifier for the gateway call.
IPt h3cVoVoIPCallActiveRemSigIPType	1.3.6.1.4.1.43.45.1.10.2.39.15.1.2.1.2	InetAddressType	read-only	The type of remote system signalling IP address for the VoIP call.
IP h3cVoVoIPCallActiveRemSigIPAddr	1.3.6.1.4.1.43.45.1.10.2.39.15.1.2.1.3	InetAddress	read-only	Remote system signalling IP address for the VoIP call.
I32 h3cVoVoIPCallActiveRemSigPort	1.3.6.1.4.1.43.45.1.10.2.39.15.1.2.1.4	Integer32	read-only	Remote system UDP listener signalling port to which to transmit voice packets.
IPt h3cVoVoIPCallActiveRemMedIPType	1.3.6.1.4.1.43.45.1.10.2.39.15.1.2.1.5	InetAddressType	read-only	The type of remote system media IP address for the VoIP call.
IP h3cVoVoIPCallActiveRemMedIPAddr	1.3.6.1.4.1.43.45.1.10.2.39.15.1.2.1.6	InetAddress	read-only	Remote system media IP address for the VoIP call.
I32 h3cVoVoIPCallActiveRemMedPort	1.3.6.1.4.1.43.45.1.10.2.39.15.1.2.1.7	Integer32	read-only	Remote system UDP listener media port to which to transmit voice packets.
INT h3cVoVoIPCallActiveSessProtocol	1.3.6.1.4.1.43.45.1.10.2.39.15.1.2.1.8	INTEGER	read-only	The object specifies the session protocol to be used for internet call between local and remote router via IP backbone.
H3C h3cVoVoIPCallActiveCoderType	1.3.6.1.4.1.43.45.1.10.2.39.15.1.2.1.9	H3cCodecType	read-only	The negotiated coder type. It specifies the encode type to the VoIP leg of a call.

RFC description

Vendor-private MIB (3Com/Huawei) for monitoring active voice call sessions and call management data.

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Download A3COM-HUAWEI-VOICE-CALL-ACTIVE-MIB