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Cisco PGW 2200 Softswitch

Support of DSP Voice Quality Statistics

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Support of DSP Voice Quality Statistics

Table Of Contents

Support of DSP Voice Quality Statistics

Feature Overview

Benefits

Restrictions

Related Features and Technologies

Related Documents

Supported Platforms

Supported Standards, MIBs, and RFCs

Prerequisites for Using this Feature

Billing Interface

Originating Leg DSP Statistics (Tag: 4098)

Terminating Leg DSP Statistics (Tag: 4099)

Obtaining Documentation

Cisco.com

Product Documentation DVD

Ordering Documentation

Documentation Feedback

Cisco Product Security Overview

Reporting Security Problems in Cisco Products

Obtaining Technical Assistance

Cisco Technical Support & Documentation Website

Submitting a Service Request

Definitions of Service Request Severity

Obtaining Additional Publications and Information

Glossary


Support of DSP Voice Quality Statistics


Document Release History

Publication Date
Comments

March 31, 2006

Initial version of the document.

October 17, 2006

Updated media gateway list.


Feature History

Release
Modification

9.6(1)

This feature is introduced in Release 9.6(1)


This feature is described in the following sections:

Feature Overview

Supported Platforms

Supported Standards, MIBs, and RFCs

Prerequisites for Using this Feature

Billing Interface

Obtaining Documentation

Documentation Feedback

Cisco Product Security Overview

Obtaining Technical Assistance

Obtaining Additional Publications and Information

Glossary

Feature Overview

The Cisco PSTN Gateway (PGW) 2200, when it is configured for call control mode, supports the collection of additional digital signal processor (DSP) statistics from Cisco media gateways in the PGW call detail records (CDRs). These DSP statistics are provided by various Cisco media gateways in the Media Gateway Control Protocol (MGCP) Delete Connection (DLCX) message. The collection of these statistics can be used to evaluate voice quality metrics within the Voice over IP (VoIP) network.

When you install the Cisco MGC software patch, CSCOnn026, the functionality for this feature is automatically activated. You do not have to make any configuration or provisioning changes to activate this feature. For details of the changes to the Cisco MGC software, proceed to the "Billing Interface" section.

An IOS software feature, DSP Voice Quality in DLCX Messages, has modified the DSP statistics gathering function on Cisco media gateways. This feature provides a way to trace a MGCP call between a Cisco PGW 2200 and the Cisco IOS gateway by including the MGCP call ID and the DS0 and DSP channel ID in call-active and call-history records. These DSP statistics are sent as part of the MGCP Delete Connection (DLCX) message. By correlating an MGCP call on the Cisco PGW 2200 with the call record on the gateway, additional statistics from the DSP can be understood and debugged for problems related to voice quality. This feature also provides a method to limit the amount of statistics sent to the Cisco PGW 2200, to control the impact to call processing performance. The Support of DSP Voice Quality Statistics feature supports the gathering of the DSP voice quality statistics on the Cisco PGW 2200.

For more information on the DSP voice quality statistics that can be gathered on Cisco media gateways and how to configure the priority settings on the media gateway, refer to the DSP Voice Quality Statistics in DLCX Messages feature module.

Benefits

This feature provides the following benefits:

Improved Quality of Service Capability

The DSP voice quality statistics improve your ability to monitor, analyze, and ultimately meet your quality of service (QoS) objectives for your network.

Restrictions

We recommend that you do not enable the DSP Voice Quality Statistics in DLCX Messages feature on all of the media gateways associated with a single Cisco PGW 2200 pair. Doing so can severely impact the call processing ability of your system. You can use the statistics control function in the feature to limit the impact on call processing.

The DSP voice quality statistics are available in Cisco IOS release 12.4(4)T and can be used only with the following Cisco media gateways which use the c5510 DSP.

Cisco 26xx (must use the NM-HDV2, NM-HD, or EVM-HDM)

Cisco 36xx (must use the NM-HDV2, NM-HD, or EVM-HDM)

Cisco 37xx (must use the NM-HDV2, NM-HD, or EVM-HDM)

Cisco 28xx

Cisco 38xx

Cisco AS5350xm

Cisco AS5351xm

Cisco AS5400xm

Related Features and Technologies

This feature is related to the DSP Voice Quality Statistics in DLCX Messages feature that is implemented in Cisco IOS Release 12.4(4)T.

Related Documents

This document contains information that is related strictly to this feature. The documents that contain additional information related to the Cisco Media Gateway Controller (MGC) are listed below:

Release Notes for Cisco Media Gateway Controller Software Release 9.6(1)

Cisco Media Gateway Controller Hardware Installation Guide

Regulatory Compliance and Safety Information for the Cisco Media Gateway Controller

Cisco Media Gateway Controller Software Release 9 Installation and Configuration Guide

Cisco Media Gateway Controller Software Release 9 Provisioning Guide

Cisco Media Gateway Controller Software Release 9 Dial Plan Guide

Cisco Media Gateway Controller Software Release 9 MML Command Reference

Cisco Media Gateway Controller Software Release 9 Messages Reference Guide

Cisco Media Gateway Controller Software Release 9 Billing Interface Guide

Cisco Media Gateway Controller Software Release 9.6(1) Management Information Base Guides

Cisco Media Gateway Controller Software Release 9 Operations, Maintenance, and Troubleshooting Guide

DSP Voice Quality Statistics in DLCX Messages

Supported Platforms

The hardware platforms supported for the Cisco MGC software are described in the Cisco Media Gateway Controller Hardware Installation Guide.

Supported Standards, MIBs, and RFCs

Standards

No new or modified standards are supported by this feature.

MIBs

No new or modified MIBs are supported by this feature.

For more information on the MIBs used in the Cisco MGC software, refer to the Cisco Media Gateway Controller Software Release 9 Management Information Base Guides.

RFCs

No new or modified RFCs are supported by this feature.

Prerequisites for Using this Feature

You must have Cisco MGC software Release 9.6(1), patch CSCOnn026 installed. Prerequisites for this release can be found in the Release Notes for the Cisco Media Gateway Controller Software Release 9.6(1).

Billing Interface

The following call data elements (CDEs) were modified for this feature.

Originating Leg DSP Statistics (Tag: 4098)

Table 1 Originating Leg DSP Statistics Description Form 

Name: Originating Leg DSP Statistics

Tag: 4098

Source: Engine

Description/Purpose: Provides DSP statistics for the originating leg of the call.

Format: IA5

Length in Octets: 280 through 794

Data Value:

An example of the statistics generated by the media gateway appears below:

OrigDSPstats...: 	DSP/TX: PK=data1, SG=data2, NS= data3, DU= data4, VO=, 
	DSP/RX: VO= , SG= , CF= , RX= , BS= , BP= , LP= , EP= ,
	DSP/PD: CU= , MI= , MA= , CO= , IJ= ,
	DSP/PE: PC= , IC= , SC= , RM= , BO= , EE= ,
	DSP/LE: TP= , TX= , RP= , RM= , BN= , ER= , AC= , TA= , RA= ,
	DSP/ER: RD= , TD= , RC= , TC= ,
	DSP/IC: IC= ,.

In Release 9.6, the statistics are enhanced to support the DSP Voice Quality Statistics in DLCX Messages feature in Cisco IOS Release 12.4(4)T. The DSP Voice Quality Statistics feature introduces a priority setting on the media gateway that allows control of the impact of statistic generation. There are two priority values: 1, which limits the statistics generated by the media gateway, and 2, which enables all statistics to be generated.

An example of the appearance of the statistics generated when the media gateway is set to priority 1 appears below.

OrigDSPstats.....:	DSP/TX: PK=, SG=, NS=, DU=, VO=, 
	DSP/RX: PK=, SG=, CF=, RX=, VO=, BS=, BP=, LP=, EP=, 
	DSP/PD: CU=, MI=, MA=, CO=, IJ=, 
	DSP/LE: TP=, TX=, RP=, RM=, BN=, ER=, AC=, 
	DSP/EC: CI=, FM=, FP=, VS=, GT=, GR=, JD=, JN=, JM=, JX=,
	DSP/CS: CR=, AV=, MX=, CT=, TT=, OK=, CS=, SC=, TS=, DC=,
	DSP/DL: RT=, ED=

An example of the appearance of the statistics generated when the media gateway is set to priority 2 appears below.

OrigDSPstats.....:		DSP/TX: PK=, SG=, NS=, DU=, VO=, 
		DSP/RX: PK=, SG=, CF=, RX=, VO=, BS=, BP=, LP=, EP=, 
		DSP/PD: CU=, MI=, MA=, CO=, IJ=, 
		DSP/PE: PC=, IC=, SC=, RM=, BO=, EE=, 
		DSP/LE: TP=, TX=, RP=, RM=, BN=, ER=, AC=,
		DSP/ER: RD=, TD=, RC=, TC=,
		DSP/IC: IC=, 
		DSP/EC: CI=, FM=, FP=, VS=, GT=, GR=, JD=, JN=, JM=, JX=, 
		DSP/KF: KF=, AV=, MI=, BS=, NB=, FL=, NW=, VR=, 
		DSP/CS: CR=, AV=, MX=, CT=, TT=, OK=, CS=, SC=, TS=, DC=, 
		DSP/RF: ML=, MC=, R1=, R2=, IF=, ID=, IE=, BL=, R0=, VR=, 
		DSP/UC: U1=, U2=, T1=, T2=,
		DSP/DL: RT=, ED=

Extended Data Value: No extended value.

General Information: This CDE is populated when an originating endpoint is controlled by the Cisco MGC software through the MGCP protocol and the associated MGCP media gateway is enabled to send DSP statistics to the Cisco MGC.

Information on the configuring DSP voice quality statistics on the media gateway and definitions for the various fields used in the statistics can be found in the DSP Voice Quality Statistics in DLCX Messages feature module.

MGC Release: Release 9.4(1) and later.

Support of the DSP voice quality statistics is added in Release 9.6(1), patch CSCOnn026.


Terminating Leg DSP Statistics (Tag: 4099)

Table 2 Terminating Leg DSP Statistics Description Form 

Name: Terminating Leg DSP Statistics

Tag: 4099

Source: Engine

Description/Purpose: Provides DSP statistics for the terminating leg of the call.

Format: IA5

Length in Octets: 280 through 794

Data Value:

TermDSPstats.....: 	DSP/TX: 	PK=data1, SG=data2, NS= data3, DU= data4, VO=, 
	DSP/RX: 	VO= , SG= , CF= , RX= , BS= , BP= , LP= , EP= ,
	DSP/PD: 	CU= , MI= , MA= , CO= , IJ= ,
	DSP/PE: 	PC= , IC= , SC= , RM= , BO= , EE= ,
	DSP/LE: 	TP= , TX= , RP= , RM= , BN= , ER= , AC= , TA= , RA= ,
	DSP/ER: 	RD= , TD= , RC= , TC= ,DSP/IC: IC= ,.

In Release 9.6, the statistics are enhanced to support the DSP Voice Quality Statistics in DLCX Messages feature in Cisco IOS Release 12.4(4)T. The DSP Voice Quality Statistics feature introduces a priority setting on the media gateway that allows control of the impact of statistic generation. There are two priority values: 1, which limits the statistics generated by the media gateway, and 2, which enables all statistics to be generated.

An example of the appearance of the statistics generated when the media gateway is set to priority 1 appears below.

TermDSPstats.....:	DSP/TX: PK=, SG=, NS=, DU=, VO=, 
	DSP/RX: PK=, SG=, CF=, RX=, VO=, BS=, BP=, LP=, EP=, 
	DSP/PD: CU=, MI=, MA=, CO=, IJ=, 
	DSP/LE: TP=, TX=, RP=, RM=, BN=, ER=, AC=, 
	DSP/EC: CI=, FM=, FP=, VS=, GT=, GR=, JD=, JN=, JM=, JX=,
	DSP/CS: CR=, AV=, MX=, CT=, TT=, OK=, CS=, SC=, TS=, DC=,
	DSP/DL: RT=, ED=

An example of the appearance of the statistics generated when the media gateway is set to priority 2 appears below.

TermDSPstats.....:		DSP/TX: PK=, SG=, NS=, DU=, VO=, 
		DSP/RX: PK=, SG=, CF=, RX=, VO=, BS=, BP=, LP=, EP=, 
		DSP/PD: CU=, MI=, MA=, CO=, IJ=, 
		DSP/PE: PC=, IC=, SC=, RM=, BO=, EE=, 
		DSP/LE: TP=, TX=, RP=, RM=, BN=, ER=, AC=,
		DSP/ER: RD=, TD=, RC=, TC=,
		DSP/IC: IC=, 
		DSP/EC: CI=, FM=, FP=, VS=, GT=, GR=, JD=, JN=, JM=, JX=, 
		DSP/KF: KF=, AV=, MI=, BS=, NB=, FL=, NW=, VR=, 
		DSP/CS: CR=, AV=, MX=, CT=, TT=, OK=, CS=, SC=, TS=, DC=, 
		DSP/RF: ML=, MC=, R1=, R2=, IF=, ID=, IE=, BL=, R0=, VR=, 
		DSP/UC: U1=, U2=, T1=, T2=,
		DSP/DL: RT=, ED=

Extended Data Value: No extended value.

General Information: This CDE is populated when a terminating endpoint is controlled by the Cisco MGC software through the MGCP protocol and the associated MGCP media gateway is enabled to send DSP statistics to the Cisco MGC.

Information on the configuring DSP voice quality statistics on the media gateway and definitions for the various fields used in the statistics can be found in the DSP Voice Quality Statistics in DLCX Messages feature module.

MGC Release: Release 9.4(1) and later.

Support of the DSP voice quality statistics is added in Release 9.6(1),  patch CSCOnn026.


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Glossary

Table 3 lists some acronyms used in this document.

Table 3 Acronyms Used In This Document

Term
Expansion

CDE

call data element

CDR

call detail record

DLCX

Delete Connection

DSP

digital signal processor

MGC

media gateway controller

MGCP

Media Gateway Control Protocol

PGW

PSTN Gateway

PSTN

public switched telephone network

QOS

quality of service

VoIP

Voice over Internet Protocol