H225-MIB

All MIBs › H225-MIB

Organization: ITU-T SG 16

Last Updated: 1998-12-22

Category: Domain: Telephony/VoIP

Description: ITU-T H.225 MIB for managing H.225 call signaling and RAS (Registration/Admission/Status) in H.323 networks.

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What Is H225-MIB?

This MIB module, based on ITU-T Recommendation H.225.0, manages call signaling and Registration/Admission/Status (RAS) functions within H.323 VoIP/videoconferencing networks. It exposes configuration and statistics tables for call signaling channels, tracking session parameters and performance counters for call setup and control messages. Its monitoring value centers on software/protocol-level status, confirming call signaling channels are correctly configured and tracking statistics that reveal call setup failures, signaling errors, or unusual call volume affecting a H.323 gatekeeper or gateway's service health. As an ITU-T/H.323 standards MIB, it is closely tied to companion protocol standards and likely complements other VoIP-related MIBs. It is typically deployed on H.323 gatekeepers, gateways, or multipoint control units handling VoIP/video call signaling in enterprise or carrier voice networks. Engineers implementing or auditing this functionality typically reference the H225-MIB RFC/standard documentation for the authoritative specification.

IPNetwork Monitor allows you to monitor SNMP objects defined in H225-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

vendor-neutral, standards-based MIB, not tied to a specific manufacturer
H.323 gatekeepers, gateways, and multipoint control units

Monitoring Examples

An administrator would poll callSignalConfigTable/callSignalConfigEntry to verify signaling channel parameters, such as configured ports or timers, on an H.323 gateway. Checking callSignalStatsTable/callSignalStatsEntry would reveal call setup success/failure counts, helping detect a rise in failed call attempts indicating a signaling misconfiguration or capacity issue. Correlating spikes in signaling errors with call volume would help distinguish a genuine overload condition from a protocol interoperability problem with a peer gatekeeper.

What Can Be Monitored

call signaling channel configuration
call setup/signaling statistics
call signaling errors
RAS status

Imported Objects

From IF-MIB

ifIndex

OBJECT-TYPE

From MULTI-MEDIA-MIB-TC

MmAliasAddress
MmAliasTag
MmCallType
MmGlobalIdentifier
MmH225Crv
MmH323EndpointType
MmTAddressTag
mmH323Root	OBJECT-IDENTITY

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

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

From SNMPv2-TC

DateAndTime
DisplayString
TAddress

How to Use in IPNetwork Monitor

Example using callSignalStatsCallConnectionsIn OID:

Select an H.323 gatekeeper, gateway, or multipoint control unit 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 callSignalStatsCallConnectionsIn into the Find box to locate it in the OID tree, then select it and click OK. The number of successful connections in which this entity has been a callee. 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

OID symbolic	OID numeric	Type	Access	Description
NTF callReleaseComplete	0.0.8.341.1.1.1.4.0.1			This message will be sent in the case of on generation and reception of releaseComplete for the following reasons: 34 - noBandwidth; no circuit/channel available 47 - gatekeeperResources; resource unavailable 3 - unreachableDestination; no route to destination 16 - destinationReject; destination did not accept this call 88 - invalidRevision; incompatible destination 111- noPermission; Interworking unspecified 38 - unreachableGatekeeper; network out of order 42 - gatewayResources; switching equipment congestion 28 - badFormaTAddress; invalid number format 41 - adaptiveBusy; Temporary Failure 17 - inConference; user busy 31 - undefined.
callSignalConfig	0.0.8.341.1.1.1.1
I32 callSignalConfigAvailableConnections	0.0.8.341.1.1.1.1.1.1.2	Integer32	read-only	The number of available connections, out of callSignalConfigMaxConnections.
INT callSignalConfigEnableNotifications	0.0.8.341.1.1.1.1.1.1.5	INTEGER	read-write	Indicates whether notifications should be generated from this MIB. The default is disabled.
callSignalConfigEntry	0.0.8.341.1.1.1.1.1.1		not-accessible	It contains objects that describe the configuration.
callSignalConfigGroup	0.0.8.341.1.1.1.5.1.1			.
I32 callSignalConfigMaxConnections	0.0.8.341.1.1.1.1.1.1.1	Integer32	read-only	The maximum number of connections the H.225 entity can possibly have.
I32 callSignalConfigT301	0.0.8.341.1.1.1.1.1.1.4	Integer32	read-write	The amount of time after which the calling endpoint should stop waiting for the called endpoint to respond. The time value is in seconds.
I32 callSignalConfigT303	0.0.8.341.1.1.1.1.1.1.3	Integer32	read-write	The amount of time the calling endpoint waits for an ALERTING, CALL PROCEEDING, CONNECT, RELEASE COMPLETE or other message the called endpoint after it has sent a SETUP message. The time value is in seconds.
callSignalConfigTable	0.0.8.341.1.1.1.1.1		not-accessible	This table contains configuration information for instances of a call signaling protocol.
callSignalEvents	0.0.8.341.1.1.1.4.0
callSignalEventsGroup	0.0.8.341.1.1.1.5.1.4			.
callSignalingMIBCompliance	0.0.8.341.1.1.1.5.2			The set of objects required for compliance.
callSignalingMIBConformance	0.0.8.341.1.1.1.5
callSignalingMIBGroups	0.0.8.341.1.1.1.5.1
callSignalStats	0.0.8.341.1.1.1.2
C32 callSignalStatsAlertingMsgsIn	0.0.8.341.1.1.1.2.1.1.3	Counter32	read-only	The number of alerting messages received by this entity.
C32 callSignalStatsAlertingMsgsOut	0.0.8.341.1.1.1.2.1.1.4	Counter32	read-only	The number of alerting messages sent by this entity.
I32 callSignalStatsAverageCallDuration	0.0.8.341.1.1.1.2.1.1.25	Integer32	read-only	The average duration of the call in minutes since system boot time.
C32 callSignalStatsCallConnectionsInEx	0.0.8.341.1.1.1.2.1.1.1	Counter32	read-only	The number of successful connections in which this entity has been a callee.
C32 callSignalStatsCallConnectionsOut	0.0.8.341.1.1.1.2.1.1.2	Counter32	read-only	The number of successful connections in which this entity has been a caller.
C32 callSignalStatsCallProceedingsIn	0.0.8.341.1.1.1.2.1.1.5	Counter32	read-only	The number of call proceeding messages received by this entity.
C32 callSignalStatsCallProceedingsOut	0.0.8.341.1.1.1.2.1.1.6	Counter32	read-only	The number of call proceeding messages sent by this entity.
callSignalStatsEntry	0.0.8.341.1.1.1.2.1.1		not-accessible	It contains objects that describe statistics.
C32 callSignalStatsFacilityMsgsIn	0.0.8.341.1.1.1.2.1.1.19	Counter32	read-only	The number of connect messages received by this entity.
C32 callSignalStatsFacilityMsgsOut	0.0.8.341.1.1.1.2.1.1.20	Counter32	read-only	The number of connect messages sent by this entity.
callSignalStatsGroup	0.0.8.341.1.1.1.5.1.2			.
C32 callSignalStatsInfoMsgsIn	0.0.8.341.1.1.1.2.1.1.21	Counter32	read-only	The number of info messages received by this entity.
C32 callSignalStatsInfoMsgsOut	0.0.8.341.1.1.1.2.1.1.22	Counter32	read-only	The number of info messages sent by this entity.
C32 callSignalStatsNotifyMsgsIn	0.0.8.341.1.1.1.2.1.1.23	Counter32	read-only	The number of notify messages received by this entity.
C32 callSignalStatsNotifyMsgsOut	0.0.8.341.1.1.1.2.1.1.24	Counter32	read-only	The number of notify messages sent by this entity.
C32 callSignalStatsProgressMsgsIn	0.0.8.341.1.1.1.2.1.1.11	Counter32	read-only	The number of progress messages received by this entity.
C32 callSignalStatsProgressMsgsOut	0.0.8.341.1.1.1.2.1.1.12	Counter32	read-only	The number of progress messages sent by this entity.
C32 callSignalStatsReleaseCompleteMsgsIn	0.0.8.341.1.1.1.2.1.1.13	Counter32	read-only	The number of release complete messages received by this entity.
C32 callSignalStatsReleaseCompleteMsgsOut	0.0.8.341.1.1.1.2.1.1.14	Counter32	read-only	The number of release complete messages sent by this entity.
C32 callSignalStatsSetupAckMsgsIn	0.0.8.341.1.1.1.2.1.1.9	Counter32	read-only	The number of setupAck messages received by this entity.
C32 callSignalStatsSetupAckMsgsOut	0.0.8.341.1.1.1.2.1.1.10	Counter32	read-only	The number of setupAck messages sent by this entity.
C32 callSignalStatsSetupMsgsIn	0.0.8.341.1.1.1.2.1.1.7	Counter32	read-only	The number of setup messages received by this entity.
C32 callSignalStatsSetupMsgsOut	0.0.8.341.1.1.1.2.1.1.8	Counter32	read-only	The number of setup messages sent by this entity.
C32 callSignalStatsStatusInquiryMsgsIn	0.0.8.341.1.1.1.2.1.1.17	Counter32	read-only	The number of status inquiry messages received by this entity.
C32 callSignalStatsStatusInquiryMsgsOut	0.0.8.341.1.1.1.2.1.1.18	Counter32	read-only	The number of status inquiry messages sent by this entity.
C32 callSignalStatsStatusMsgsIn	0.0.8.341.1.1.1.2.1.1.15	Counter32	read-only	The number of status messages received by this entity.
C32 callSignalStatsStatusMsgsOut	0.0.8.341.1.1.1.2.1.1.16	Counter32	read-only	The number of status messages sent by this entity.
callSignalStatsTable	0.0.8.341.1.1.1.2.1		not-accessible	This table contains statistics information for instances of a call signaling protocol.
connections	0.0.8.341.1.1.1.3
I32 connectionsActiveConnections	0.0.8.341.1.1.1.3.1	Integer32	read-only	The number of active connections.
STR connectionsCalledPartyNumber	0.0.8.341.1.1.1.3.2.1.15	DisplayString	read-only	The primary e164 address of the destination endpoint.
OID connectionsCallIdentifier	0.0.8.341.1.1.1.3.2.1.3	MmGlobalIdentifier	not-accessible	The call identifier.
MMC connectionsCallType	0.0.8.341.1.1.1.3.2.1.26	MmCallType	read-only	The type of the call for this connection.
INT connectionsCanOverlapSend	0.0.8.341.1.1.1.3.2.1.24	INTEGER	read-only	Indicator of canOverLap usage for this connection.
OID connectionsConfId	0.0.8.341.1.1.1.3.2.1.14	MmGlobalIdentifier	read-only	The conference id for this connection.
DAT connectionsConnectionStartTime	0.0.8.341.1.1.1.3.2.1.30	DateAndTime	read-only	The date and time of the start of this call.
MMH connectionsCRV	0.0.8.341.1.1.1.3.2.1.25	MmH225Crv	read-only	The call reference value.
ADR connectionsDestAlias	0.0.8.341.1.1.1.3.2.1.9	MmAliasAddress	read-only	The transport port of the destination endpoint.
MMA connectionsDestAliasTag	0.0.8.341.1.1.1.3.2.1.8	MmAliasTag	read-only	The alias tag of the registred endpoint.
ADR connectionsDestH245SigTransporTAddress	0.0.8.341.1.1.1.3.2.1.13	TAddress	read-only	The transport address of the destination endpoint.
ADR connectionsDestH245SigTransporTAddressTag	0.0.8.341.1.1.1.3.2.1.12	MmTAddressTag	read-only	The transport address tag of the endpoint.
ADR connectionsDestTransporTAddress	0.0.8.341.1.1.1.3.2.1.7	TAddress	read-only	The transport address of the destination endpoint.
ADR connectionsDestTransporTAddressTag	0.0.8.341.1.1.1.3.2.1.6	MmTAddressTag	read-only	The transport address tag of the endpoint.
STR connectionsDestXtraCallingNumber1	0.0.8.341.1.1.1.3.2.1.16	DisplayString	read-only	The secondary info e164 address of the destination endpoint.
STR connectionsDestXtraCallingNumber2	0.0.8.341.1.1.1.3.2.1.17	DisplayString	read-only	The third info e164 address of the destination endpoint.
STR connectionsDestXtraCallingNumber3	0.0.8.341.1.1.1.3.2.1.18	DisplayString	read-only	The fourth info e164 address of the destination endpoint.
STR connectionsDestXtraCallingNumber4	0.0.8.341.1.1.1.3.2.1.19	DisplayString	read-only	The fifth info e164 address of the destination endpoint.
STR connectionsDestXtraCallingNumber5	0.0.8.341.1.1.1.3.2.1.20	DisplayString	read-only	The sixth info e164 address of the destination endpoint.
NUM connectionsEndpointType	0.0.8.341.1.1.1.3.2.1.31	MmH323EndpointType	read-only	Terminal type represents the type of H.323 terminal: 50 - terminal without MC 60 - gateway without MC 70 - terminal with MC but without MP 80 - gateway with MC but without MP 120 - gatekeeper with MC but without MP 160 - MCU with MC but without MP 90 - gateway with MC and Data MP 130 - gatekeeper with MC and Data MP 170 - MCU with MC and Data MP 100 - gateway containing MC with Data and audio MP 140 - gatekeeper containing MC with Data and audio MP 180 - MCU containing MC with Data and audio MP 110 - gateway containing MC with Data, Audio and Video MP 150 - gatekeeper containing MC with Data, Audio and Video MP 190 - MCU containing MC with Data, Audio and Video MP 240 - entity with active MC .
MMH connectionsExtraCRV1	0.0.8.341.1.1.1.3.2.1.28	MmH225Crv	read-only	The additional call reference value.
MMH connectionsExtraCRV2	0.0.8.341.1.1.1.3.2.1.29	MmH225Crv	read-only	The additional call reference value.
INT connectionsFastCall	0.0.8.341.1.1.1.3.2.1.21	INTEGER	read-only	Indicator of fast call usage for this connection.
connectionsGroup	0.0.8.341.1.1.1.5.1.3			.
INT connectionsH245Tunneling	0.0.8.341.1.1.1.3.2.1.23	INTEGER	read-only	Indicator of H245 tunneling usage for this connection.
INT connectionsReleaseCompleteReason	0.0.8.341.1.1.1.3.2.1.32	INTEGER	read-only	The date and time of the start of this call.
OCT connectionsRemoteExtensionAddress	0.0.8.341.1.1.1.3.2.1.27	OCTET STRING	read-only	The additional address for GW-GW calls
INT connectionsRole	0.0.8.341.1.1.1.3.2.1.4	INTEGER	read-only	This value reflects the role this entity plays in this connection being either a caller or a callee.
INT connectionsSecurity	0.0.8.341.1.1.1.3.2.1.22	INTEGER	read-only	Indicator of encryption usage for this connection.
ADR connectionsSrcH245SigTransporTAddress	0.0.8.341.1.1.1.3.2.1.11	TAddress	read-only	The H245 IP address of the source endpoint.
ADR connectionsSrcH245SigTransporTAddressTag	0.0.8.341.1.1.1.3.2.1.10	MmTAddressTag	read-only	The transport address tag of the endpoint.
ADR connectionsSrcTransporTAddress	0.0.8.341.1.1.1.3.2.1.2	TAddress	not-accessible	The transport address of the source endpoint that initiated the connection.
ADR connectionsSrcTransporTAddressTag	0.0.8.341.1.1.1.3.2.1.1	MmTAddressTag	not-accessible	The transport address tag of the endpoint.
INT connectionsState	0.0.8.341.1.1.1.3.2.1.5	INTEGER	read-only	The state of the H.225 state machine as per Q.931. Outgoing calls: callInitiated - when the user requests call establishment from the network callDelivered - when the calling user has received an indication that remote user alerting has been initiated. Incoming calls: callPresent - when the user has received a call establishment but not yet responded. callReceived - when the user has indicated alerting but not yet answered. connectRequest - when the user has answered the call and is waiting to be awarded the call. Incoming/Outgoing: callProceeding - when the user has received/sent acknowledgement that the network has received all call information necessary to effect call establishment. active - when the user has received/sent an acknoledgement from/to the network that the user has been awarded the call. disconnectRequest - when the user has requested the network to clear the end-to-end connection. disconnectIndication - when the user has received an invitation to disconnect to disconnect because the network has disconnected the end-to-end connection. releaseRequest - when the user has requested the network to release and is waiting for a responce.
connectionsTable	0.0.8.341.1.1.1.3.2		not-accessible	This table contains information about entities that are connected to this entity. It is a list of connection entries. The number of entries equals to the number of active connections.
connectionsTableEntry	0.0.8.341.1.1.1.3.2.1		not-accessible	It contains objects that describe connections that are remotely connected to this callable H.323 entity for a conference.
h225CallSignaling	0.0.8.341.1.1.1			The MIB Module supports the functions of a H.225 call signaling .

RFC description

Manages H.225 call signaling protocol for multimedia communication endpoints.

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Download H225-MIB