Speech and DTMF Agent

Identify Network Issues Before Your Customers Start to Complain

Tektronix’s Speech & DTMF test agent for PowerProbe® service level testprobes provide a complete user-perceived quality assessment for calls placedover VoIP, TDM, and cellular networks. For accuracy and consistency, speechquality is measured using standards-based voice-quality algorithms, providingMOS, echo, volume, noise, and delay measurements.

Validate your network’s ability to transmit DTMF and Fax tones and evaluatecall connectivity with an extensive range of connection status and networktimer metrics.

For field testing applications, the award-winning PowerProbe 30 VoIPresponder is ideal as a far-end test destination. Tests are easily controlled byany web-enabled portable device including handheld testers and smartphones. GSM phones can control the tests through SMS messages.

The DirectQuality® web-based OSS easily automates complex test plans toprovide network-wide service quality monitoring and reporting. It easily isintegrated into existing operational support and fault-management systems tobring service-level visibility to all of your business processes.

Verify the health of your network bytesting all the essential voicequality and RTP measurements toproactively identify issues andensure QoS.

� One test agent measures over60 key call-quality measurements

� Initiate calls with Analog LoopStart, PRI, SIP, or MGCP signaling

� Uses the ITU-T PESQ algorithmand the MCI Labs’ statistics-based VQES algorithm

� Reference-qualitymeasurements that allows forbenchmarking of competingtechnologies and services

Features & Benefits Applications

Datasheet | www.tektronix.com/ActiveAssurance

Make Your Customer’s Experience a Priority

� Measures key call-quality metrics suchas MOS, Delay, and Echo

� Identify one-way audio problems

� Evaluate codec performance

� Call progress metrics

� DTMF and Fax tone testing

� Core-to-hub (mesh) testing

� Hub-to-edge QoE testing

� Day-of-install and field testing withinexpensive responders

� Long-term monitoring and pro-activefault detection

� Provisioning and troubleshooting

LQ listening quality Dual Tone Multi-Frequency DTMF Voice over IP Mean Opinion Score time division multiplex PP30 PP500PP6000 quality of experience quality of service Real-time Transport Protocol primary rate interface Session Initiation ProtocolMedia Gateway Control Protocol Perceptual Evaluation of Speech Quality Voice Quality Evaluation System short messagesystem responder probe Operations Operational Support Systems internet protocol receive signal level

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Datasheet | Speech and DTMF Agent

Wireless, cable RF,IP, or Dial-up

Test Architecture for the Speech and DTMF Test Agent

DirectQuality Web-BasedOSS: This servercentralizes test planswith predefined Pass/Failcriteria, stores results,and offers advancedreporting & trending.

Integrates easily withexisting OSSs throughSNMP alarms or theGatewayDQ™ API.

PowerProbe 6000 or PowerProbe 500runs the Speech and DTMF Test Agentby placing test calls to otherPowerProbe units strategically locatedin the network, to measure more than60 metrics in less than a minute.

PowerProbe 30Responder

DirectQuality supports two remote test interfaces:

� PocketDQ™ Software for Web-Enabled Devices� SMSDQ™ Software for SMS-Enabled Devices

Mobile /VoIP / PSTN

Network Edge Testing

Core to Hub Mesh Testing

NetworkHub

IPManagementTraffic

NetworkCore

Summary View of Test Results From DirectQuality’s web-based OSS

Characteristics

Speech QualityPESQ MOSVQES MOS

Listening and Conversational qualityMOS measures speech quality in termsof end-user perception using a scalefrom 1 (worst) to 5 (best)

R FactorSpeech Power, Loss & Distortion

NoiseC-Message NoiseWideband NoiseNoise GainC-Notch Noise GainSignal-To-Noise Ratio

Wireless, CATV,xDSL, FTTx, orPSTN line

Technicians can remotelystart a test to thePowerProbe 30 using anordinary wireless devicesuch as a cell phone orPDA using either a text(SMS) or Web-basedinterface.When the tests arecomplete, results areshown on the device.

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EchoPath Loss & Delay

Voice TransmissionDetect speech clipping problems causedby Voice Activity Detectors (VADs) usingFront-End and Back-End Clippingmeasurements, and analyze the impactof silence suppression by measuringHangover events.

Frame Muting RatioComfort NoiseClipping Events (Front-End, Back-

End, & In-Between)Clipping Ratio (Front-End, Back-

End, & In-Between)Average Clipping Duration (Front-

End, Back-End, & In-Between)Hang-Over EventsAverage Hang-Over Time

RTP StatisticsPackets Sent & ReceivedPacket Loss, Bursts, & GapsPackets Out of Order & DiscardedRTCP Reporting

JitterAverage JitterJitter Buffer SizeJitter Buffer Usage

DelayVoice Path DelayRound-Trip Delay

Frequency ResponseLoss (1100Hz, 2100Hz)RSL (1100Hz, 2100Hz)

DTMF Detection & Validation0 to 9, *, #

Fax Tone DetectionCNG Tone Detection & DurationCED Tone Detection & Duration

Network TimersDial Tone DelayPost Dial DelayBilling DurationCall Duration

Connection StatusComplete Call Progress Analysis isperformed for each test call according toTektronix’s exclusive Enhanced E.180algorithm.

Call Disposition CodePRI Cause Number & LocationMGCP Return CodeSIP Return Code

NOTE: Test measurement availability varies accordingto the network protocol the PowerProbe isused with.

Create Reports by origin, destination, city, region, or breakout for any testing period fornetwork monitoring, troubleshooting, and trending

In the QoS Analysis View, User-Defined Service Level Classes are Usedto Present Results in Highly-Identifiable Pass / Fail Categories

Contact Tektronix:

Please visit www.tektronix.com/communications

Phone:1-800-833-9200 option 1+1-469-330-4000

Locate your nearest Tektronix representative at:www.tektronix.com/contactus

Copyright © Tektronix. All rights reserved. Tektronix products are covered by U.S. and foreign patents, issued andpending. Information in this publication supersedes that in all previously published material. Specification and pricechange privileges reserved. TEKTRONIX and TEK are registered trademarks of Tektronix, Inc. All other trade namesreferenced are the service marks, trademarks or registered trademarks of their respective companies. All screen imagesare simulated.

09/08 | CCW-20529-2

For Further Information:

Tektronix maintains a comprehensive, constantlyexpanding collection of application notes, technicalbriefs, and other resources to help engineersworking on the cutting edge of technology.

Please visit www.tektronix.com/communications

About Tektronix:

Tektronix Communications provides network operatorsand equipment manufacturers around the world anunparalleled suite of network diagnostics andmanagement solutions for fixed, mobile, IP, andconverged multi-service networks.

This comprehensive set of solutions support arange of architectures and applications such asLTE, fixed mobile convergence, IMS, broadbandwireless access, WiMAX, VoIP, and triple play,including IPTV.

Industry-Standard Speech Quality Algorithms

The Speech and DTMF agent incorporates standards-based VQES and PESQalgorithms that provide quality measurements that are ideal for thebenchmarking of competing technologies and services.

VQES Algorithm

Monitors the end-to-end quality of your voice services using MCI Labs’statistics-based Voice Quality Evaluation System (VQES) algorithm. It calculatesVQES MOS and Unsatisfied User Ratio, as well as conducting a fullconnectivity performance analysis.

PESQ Algorithm

Assesses the end-to-end quality of voice services using the ITU-T PESQalgorithm, to implement the PESQ Listening Quality MOS, frame muting forpacket-loss detection, distortion, and voice clipping.

DirectQuality Test Management

Advanced Test Automation

DirectQuality provides complete service level test automation from test callgeneration to Quality of Service (QoS) troubleshooting. With DirectQuality (DQ),users can schedule tests at any hour or initiate on-demand testing at customerpremises.

Color-coded Service Levels

Our Web-based OSS features color-coded, user-defined service levelthresholds for reporting, alarming, and analysis. Service violations can beforwarded to fault management systems via SNMP or email alerts can be sentto one or more individuals.

Business-level QoS Reports

DirectQuality provides a set of business-driven report templates with high-leveland drill-down views.

Datasheet | Speech and DTMF Agent