CISCO-VISM-CAS-MIB

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Organization: Cisco Systems, Inc.

Last Updated: 2003-07-16

Category: Cisco Devices, Telephony and VoIP

Description: Manages Channel Associated Signaling (CAS) configuration for TDM voice trunks on Cisco VISM gateway modules.

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What Is CISCO-VISM-CAS-MIB?

CISCO-VISM-CAS-MIB manages Channel Associated Signaling (CAS) configuration for TDM voice trunks on Cisco's VISM (Voice Interworking Service Module) gateway cards, which interwork traditional TDM/PSTN voice trunks with ATM/IP voice networks. It exposes configuration objects for CAS variants — country-specific signaling profiles, ringing timers, digit signaling methods, inter-digit timing parameters, and per-trunk-group state and row status. Its monitoring role centers on voice-trunk software/configuration status: operators check variant state and row status to confirm a CAS signaling variant is correctly provisioned and active for a given trunk group, and timing parameters to diagnose digit-collection or call-setup problems on TDM trunks. It is specific to Cisco's VISM line-card architecture and works alongside other Cisco voice-gateway MIBs for the broader interworking platform. It is deployed on Cisco VISM modules within MGX/AXSM-based voice gateway chassis handling TDM-to-packet voice trunk interworking. Engineers can download the CISCO-VISM-CAS-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in CISCO-VISM-CAS-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

Cisco VISM (Voice Interworking Service Module) voice gateway cards, e.g., in MGX/AXSM chassis

Monitoring Examples

An operator would poll vismCasVariantTable/vismCasVariantEntry (keyed by vismCasVariantName) to check vismCasVariantState and vismCasRowStatus, confirming that the correct country-specific CAS signaling profile (vismCasCountryCode) is active on a trunk group (vismCasGrp). Abnormal call setup or digit-collection failures would prompt review of vismCasDigitMethod and the inter-digit timers vismCasInterdigitTpart/Tcrit/TMF to see if timing mismatches with the far-end CAS variant are causing dropped or misrouted digits.

What Can Be Monitored

CAS variant provisioning state
trunk group signaling configuration
digit signaling method
inter-digit timing parameters
country code / CAS profile

Imported Objects

From BASIS-MIB

voice

OBJECT-IDENTITY

From CISCOWAN-SMI

ciscoWan

OBJECT-IDENTITY

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Integer32
MODULE-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

DisplayString

OIDs

OID symbolic	OID numeric	Type	Access	Description
ciscoVismCasCompliance	1.3.6.1.4.1.351.150.88.2.2.1			The compliance statement for objects related to VISM-CAS-MIB.
ciscoVismCasMIB	1.3.6.1.4.1.351.150.88			The MIB module contain the CAS backhaul feature in VISM
ciscoVismCasMIBCompliances	1.3.6.1.4.1.351.150.88.2.2
ciscoVismCasMIBConformance	1.3.6.1.4.1.351.150.88.2
ciscoVismCasMIBGroups	1.3.6.1.4.1.351.150.88.2.1
ciscoVismCasVariantGroup	1.3.6.1.4.1.351.150.88.2.1.1			The collection of objects which are used to represent VISM CAS varient.
ciscoVismCasXgcpVariantGroup	1.3.6.1.4.1.351.150.88.2.1.2			The collection of objects that is implicitly created/deleted when an entry in vismCasVariantTable is created/deleted in switching mode.
cvcVariantDeprecatedGroup	1.3.6.1.4.1.351.150.88.2.1.3			The collection of objects that were supported earlier but deprecated now.
STR vismCasCountryCode	1.3.6.1.4.1.351.110.5.5.8.1.1.10	DisplayString	read-write	Represents a case-insensitive 2-letter country code taken from ISO-3166.
INT vismCasDigitMethod	1.3.6.1.4.1.351.110.5.5.8.1.1.4	INTEGER	read-write	The default digit method to be used for digit collection. If the digit method can not be derived from the digit map specified by the call agent in the XGCP message, this digit method will be used.
STR vismCasFileName	1.3.6.1.4.1.351.110.5.5.8.1.1.2	DisplayString	read-write	This object gives the name of the file which contains the signal definition and the Finite State Machine definition for the CAS variant. The name is supplied during the creation of the table entry. Modifying the value of this object is not allowed. Upon the creation of the table entry, the file will be downloaded from a tftp server configured in the vismTftpServerDn object and the CAS finite state machine will be initialized based on the information contained in this file. This object must be provided in order to create en entry in this table.
vismCasGrp	1.3.6.1.4.1.351.110.5.5.8
I32 vismCasInterdigitTcrit	1.3.6.1.4.1.351.110.5.5.8.1.1.6	Integer32	read-write	This object represents the critical timing in seconds. If used along with a digit map, the timer is started when the last digit is received. i.e and when no more digits are required for a digit map match. After this timer expires, the digit map match is assumed to be complete. If used without a digit map, the timer is started immediately and cancelled (but not restarted) as soon as a digit is entered.
I32 vismCasInterdigitTMF	1.3.6.1.4.1.351.110.5.5.8.1.1.7	Integer32	read-write	This object represents the interdigit timeout value for MF digits. The timeout value is in seconds.
I32 vismCasInterdigitTpart	1.3.6.1.4.1.351.110.5.5.8.1.1.5	Integer32	read-write	This object represents the partial dial timing in seconds and is used along with a digit map as the inter-digit timer. The timer is not started untill the first digit is entered, and the timer is restarted after each new digit is entered untill either a digit map match or mismatch occurs.
INT vismCasRowStatus	1.3.6.1.4.1.351.110.5.5.8.1.1.9	INTEGER	read-write	This variable allows to add, delete or modify the entry for a CAS variant. createAndGo: Use this to add an entry in this table, provided the vismCasVariantName and vismCasFileName MIB objects are available to be set. active: This values is returned, once the row is created destroy: Use this to delete an entry from this table.
I32 vismCasTRinging	1.3.6.1.4.1.351.110.5.5.8.1.1.3	Integer32	read-write	This object gives the ringing time in seconds for the Cas Variant. The ringing will be on until this timer expires or until an off hook is received.
vismCasVariantEntry	1.3.6.1.4.1.351.110.5.5.8.1.1		not-accessible	An entry in the vismCasVariantTable. Each entry consists of configuration information for a specific CAS variant. An entry may be created by specifying vismCasVariantName, and vismCasFileName. Upon the creation of the table entry, the file specified by vismCasFileName will be downloaded and the CAS finite state machine will be initialized based on the information contained in this file.
STR vismCasVariantName	1.3.6.1.4.1.351.110.5.5.8.1.1.1	DisplayString	read-only	This object is a string identifier for the CAS variant. It is used as index to the table. The maximum length allowed is 64 bytes.
INT vismCasVariantSource	1.3.6.1.4.1.351.110.5.5.8.1.1.11	INTEGER	read-write	This object specifies where the file defining this CAS variant resides. 1. Unspecified. This value indicates that the location of the file is not specified here. In this case, the location is determined based on whether the TFTP server domain is defined on VISM. The file is built into the firmware if no tftp domain is defined on VISM and resides on the TFTP server if a TFTP domain is defined on VISM. 2. Internal. Indicates that the file is built into the firmware. 3. External. Indicates that the file resides on the TFTP server configured on VISM.
INT vismCasVariantState	1.3.6.1.4.1.351.110.5.5.8.1.1.8	INTEGER	read-only	This variable indicates the configuration status of the CAS variant. When the table entry is created, downloading of the file will be initiated and the state will be set to configInProgress. Once the file is successfully downloaded and the CAS finite state machine successfully initialized, the state will be set to configured. If the initialization fails, the state will be set to notConfigured.
vismCasVariantTable	1.3.6.1.4.1.351.110.5.5.8.1		not-accessible	This table contains configuration information about different CAS variants.
STR vismCasXgcpFileName	1.3.6.1.4.1.351.110.5.5.8.2.1.2	DisplayString	read-only	This object gives the name of the file which contains the signal definition and the Finite State Machine definition for the CAS variant.
I32 vismCasXgcpInitialReXmitTime	1.3.6.1.4.1.351.110.5.5.8.2.1.4	Integer32	read-write	This object represents the initial timeout value in milli seconds, used for retransmitting unacknowledged XGCP messages at the Call Agent - CAS/PBX interface. The value of this object is settable in 10 ms increments.
I32 vismCasXgcpMaxRetries	1.3.6.1.4.1.351.110.5.5.8.2.1.5	Integer32	read-write	This object specifies the number of retries for a message that exceeds vismCasXgcpMaxReXmitTime or vismCasXgcpInitialReXmitTime.
I32 vismCasXgcpMaxReXmitTime	1.3.6.1.4.1.351.110.5.5.8.2.1.3	Integer32	read-write	This object represents the maximum timeout value in milli seconds, used for retransmitting unacknowledged XGCP messages at the Call Agent - CAS/PBX interface. The value of this object is settable in 10 ms increments.
vismCasXgcpVariantEntry	1.3.6.1.4.1.351.110.5.5.8.2.1		not-accessible	An entry in the vismCasXgcpVariantTable.
STR vismCasXgcpVariantName	1.3.6.1.4.1.351.110.5.5.8.2.1.1	DisplayString	read-only	This object is a string identifier for the CAS variant. It is used as index to the table.
vismCasXgcpVariantTable	1.3.6.1.4.1.351.110.5.5.8.2		not-accessible	An entry in this table is implicitly created/deleted when an entry in vismCasVariantTable is created/deleted in switching mode .

RFC description

Manages CAS (Channel Associated Signaling) backhaul features on Cisco VISM voice modules for telephony interworking.

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Download CISCO-VISM-CAS-MIB

What Is CISCO-VISM-CAS-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description