CISCO-WAN-CODEC-GEN-PARM-MIB

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Organization: Cisco Systems, Inc.

Last Updated: 2004-03-17

Category: Telephony and VoIP, Vendor: Cisco Devices

Description: Manages Cisco WAN codec general parameters for voice compression settings on VISM cards.

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What Is CISCO-WAN-CODEC-GEN-PARM-MIB?

CISCO-WAN-CODEC-GEN-PARM-MIB is a Cisco Systems proprietary MIB configuring per-codec jitter-buffer parameters on Cisco VISM (Voice Interworking Service Module) WAN switching cards, replacing the deprecated card-level jitter objects in CISCO-VISM-MODULE-MIB with codec-based configuration. Its table, keyed by codec index, records jitter-delay mode and initial jitter-delay value. As a configuration MIB it lets an administrator tune jitter-buffer behavior per codec type rather than uniformly per card, improving voice quality for codecs with different packetization characteristics. It is deployed on Cisco VISM WAN switching cards. Engineers can download the CISCO-WAN-CODEC-GEN-PARM-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in CISCO-WAN-CODEC-GEN-PARM-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) WAN switching cards

Monitoring Examples

An administrator checks vismCodecJitterInitialDelay for a specific codec to confirm jitter-buffer tuning matches that codec's packetization interval on a Cisco VISM card.

What Can Be Monitored

per-codec jitter-buffer configuration

Imported Objects

From CISCOWAN-SMI

ciscoWan

OBJECT-IDENTITY

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

MODULE-IDENTITY
OBJECT-TYPE

OIDs

OID symbolic	OID numeric	Type	Access	Description
ciscoWanCodecGenParmMIB	1.3.6.1.4.1.351.150.21			This MIB provides configuration of Jitter buffer mode on a call and initial jitter delay value per Codec based. Prior to this, the configuration are specify on a Card based. The Card level objects vismJitterDelayMode and vismJitterInitialDelay in CISCO-VISM-MODULE-MIB are now deprecated.
ciscoWanCodecGenParmMIBObjects	1.3.6.1.4.1.351.150.21.1
vismCodecGenParmGrp	1.3.6.1.4.1.351.150.21.1.1
vismCodecGenParmTable	1.3.6.1.4.1.351.150.21.1.1.1		not-accessible	vismCodecGenParmTable contains configuration information about per codec based general parameters regardless of its application.
vismCodecGenParmEntry	1.3.6.1.4.1.351.150.21.1.1.1.1		not-accessible	User can modify the parameters at any time. If there are active calls going on, the new settings will not take affect until the next call. The last modified values are retained when VISM card reboots.
INT vismCodecIndex	1.3.6.1.4.1.351.150.21.1.1.1.1.1	INTEGER	not-accessible	This is the index to this table. 1 represents G.711u 2 represents G.711a 3 represents G.726 at rate 32 kbps 4 represents G.729a 5 represents G.729ab 6 represents clear channel 7 represents G.726 at rate 16 kbps 8 represents G.726 at rate 24 kbps 9 represents G.726 at rate 40 kbps 10 is RESERVED 11 represents G.723.1-H 12 represents G.723.1a-H 13 represents G.723.1-L 14 represents G.723.1a-L 15 represents Lossless
INT vismCodecJitterDelayMode	1.3.6.1.4.1.351.150.21.1.1.1.1.2	INTEGER	read-write	This object is used to provision the jitter buffer mode to be apply to a call connection. The possible values are: 'fixed' : means use a constant jitter buffer size, which is defined by the vismJitterInitialDelay (specify in CISCO-VISM-MODULE-MIB MIB) variable. The DSP will be instructed to use fixed with no time-stamps mode. 'adaptive': means let the DSP pick the optimal value for the call connection. 'fixedWithTimeStamp': means use a constant jitter buffer size, which is defined by the vismJitterInitialDelay variable. The DSP will be instructed to use fixed with time-stamps mode. For 'g711u', 'g711a', 'clearChannel', and 'lossless' the default value is fixed. For 'g726r32000', 'g729a', 'g729ab', 'g726r16000', 'g726r24000','g726r40000', 'g723h','g723l', 'g723ah' and 'g723al' the default value is adaptive.
INT vismCodecJitterInitialDelay	1.3.6.1.4.1.351.150.21.1.1.1.1.3	INTEGER	read-write	This object defines the jitter buffer size in milliseconds. If the vismCodecJitterDelayMode is set to be 'fixed', the jitter buffer is fixed at this value for the duration of the call, if it is set to 'adaptive', the value of this object is the initial jitter buffer size, and the DSP will adapt to an optimal size dynamically. For G.711u, G.711a, Clear Channel, the default value is 100 ms. For lossless the default value is 16ms. For 'g726r32000', 'g729a', 'g729ab', 'g726r16000', 'g726r24000','g726r40000', 'g723h','g723l', 'g723ah' and 'g723al' the default value is 60 ms. The jitter buffer size of this object differs for each set of codecs supported on VISM card. A set of codecs supported is identified by vismCodecTemplateNum object(defined in CISCO-VISM-CODEC-MIB MIB). For codecs in template number 1, 3, 4, and 5: the jitter buffer size is as follow: 'zero', 'five', 'ten' 'fifteen', 'twenty', 'thirty', 'fourty', 'fifty', 'sixty', 'seventy', 'eighty', 'ninty', 'hundred'. For codecs in template 2, the jitter buffer size is as follow: 'zero', 'five', 'ten', 'fifteen', 'twenty', 'twentyfive', 'thirty', 'thirtyfive', 'fourty', 'fortyfive', 'fifty', 'fiftyfive', 'sixty', 'sixtyfive', 'seventy', 'seventyfive', 'eighty', 'eightyfive', 'ninty', 'ninetyfive', 'hundred'. When the codec template changes, the value of this object will be implicitly set to the default value.
vismCodecGenParmNotificationPrefix	1.3.6.1.4.1.351.150.21.2
vismCodecGenParmNotifications	1.3.6.1.4.1.351.150.21.2.0
vismCodecGenParmMIBConformance	1.3.6.1.4.1.351.150.21.3
vismCodecGenParmMIBCompliances	1.3.6.1.4.1.351.150.21.3.1
vismCodecGenParmMIBCompliance	1.3.6.1.4.1.351.150.21.3.1.1			The complaince statement for VISM codec general parameter group.
vismCodecGenParmMIBGroups	1.3.6.1.4.1.351.150.21.3.2
vismCodecGenParmGroup	1.3.6.1.4.1.351.150.21.3.2.1			This group contains objects that is per codec based and non application specific.

RFC description

Manages codec jitter buffer mode and initial delay configuration on WAN interfaces for Cisco voice systems.

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Download CISCO-WAN-CODEC-GEN-PARM-MIB

What Is CISCO-WAN-CODEC-GEN-PARM-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description