• Multidsla Controller
    Multidsla Controller
  • Voice Quality Testing Using MultiDSLA
    Voice Quality Testing Using MultiDSLA
  • POLQA Surface Chart
    POLQA Surface Chart
  • POLQA 3D
    POLQA 3D
  • Voice Quality Trend Reports
    Voice Quality Trend Reports
  • MultiDSLA Tasklist Editor
  • Summary Report
    Summary Report
  • Waveform
  • Field Test GPS Outdoor Map
    Field Test GPS Outdoor Map


Voice Quality Test System for Voice Engineers and Support Teams

  • Voice Quality Of Experience - Delivers true and objective Voice quality perceived by end users
  • Standards Based Analysis - Repeatable and accurate measurements based on international standards (PESQ, POLQA®).
  • Universal - Unparalleled interoperability allows call performance testing between any end points in analogue, digital, mobile or IP domains
  • Test Design Flexibility - Automation engine enables to create any test you need. Your imagination is your only limit.
  • Smart Analytics - Full drill-down and detailed graphical analysis help resolve problems quickly
  • Seamless Integration - Comprehensive API enables you to automate MultiDSLA from anywhere, by any application, at any level
  • Scalable Architecture - Modular, Scalable Architecture makes it usable from the product Lab environment to Enterprise Network Operations



Capture all influences on your Voice Quality Scores

All influences on voice quality scores are captured and identified

What if you get a bad score?
MultiDSLA provides smart analytics to identify all influences and root cause

MultiDSLA solution is a state of the art measurement system for Voice Quality Testing and Performance Assessment used by many organisations as the reference measurement in applications ranging from core technology development to network operations.

In addition to objective and undisputable voice quality scores such as PESQ & POLQA MOS, MultiDSLA offers smart analytics and key performance indicators to help you identify the root cause of distortions in the degraded voice signal:

  • Network impairments : one-way delay, packet loss, jitter buffer behaviour and echo,
  • Speech & Noise level,
  • Codec distortion,
  • Voice activity detector (VAD) performance,
  • Call setup analysis,
  • DTMF sequences,
  • And many more!

Most versatile voice quality test solution

The MultiDSLA Controller centrally automates call set up and measurements between any MultiDSLA Nodes in your voice network. Tests occur according to a pre-defined schedule or on demand with a simple to use graphical representation of the network.

MultiDSLA offers unrivalled ease of use and can perform the most complex test processes, controlling 100+ Nodes.

MultiDSLA Controller

Simultaneous control of many nodes
Flexible automation system
PESQ, E-Model & POLQA® Voice Quality
Root cause analysis
Speech level, noise, delay, echo measurement
DTMF sequences analysis
Conference bridge testing
Speech Recognition
SLA management & Alarms
Summary reports
Pass/Fail criteria
100% remote access Open API

Free Trial

The MultiDSLA Nodes are capable of generating voice signals at any level, and measure the key performance indicators configurable via the controller. Any selection of node types can be configured. The user interface is consistent and the test process remains identical, regardless of which node types are being used, making the system easy to learn, easy to use and supremely flexible.

Configure a system for your test application - VoIP service to analogue PBX, mobile to PRI, soft phone to POTS, BRI to Bluetooth, and so on.

Analogue & Cellular Nodes

Digital Speech Level Analyzer

The DSLA is a high-quality 2, 4 or 6 channel analogue hardware device designed by Opale Systems with an optimal interface for voice-band test.

Learn More

VoIP & VoLTE SIP Nodes

Voxport Packet

The VPP nodes includes options for lab based and network-wide testing of VoIP and VoLTE performance, with or without built-in RTP packet impairment.

Learn More

ISDN & TDM Nodes


Basic Rate (BRI) and Primary Rate (E1/T1) interfaces are based on industry standard PC cards with Opale software, and centrally managed by MultiDSLA Controller.

Learn More
Discover your true MOS
Try MultiDSLA... free !


MultiDSLA Task List Editor

Flexible Automation Engine

Unparalleled granularity of single tasks to be automated.
Tasklist editor enables you to play, control, wait or trigger any event at will.

End-User Experience
Voice Quality Metrics

Objective MOS based on ITU-T PESQ® and POLQA® standards.
Non intrusive nodes with the highest measurement accuracy.
MultiDSLA Task List Editor
MultiDSLA Task List Editor

Management Reports

SLA Management.
Setup your Pass/Fail criteria on any KPI.
Monitor your one-way delay, jitter, MOS, echo, speech levels...

Field Test with Outdoor Maps

Test multiple "Fixed line to Mobile" or "Mobile to Mobile" communications simultaneously.
GPS localization and synchronisation.
Post process mapping data into Google Earth.
MultiDSLA Task List Editor
MultiDSLA Task List Editor

Speech Recognition

Suitable for functional testing or residential gateways.
Automatic access to our Speech-To-Text online platform.

100% Open API

TCL, Perl, Python, TCP/IP support with wrappers available.
Allows integration with any quality test automation software
(HP Quality Center).
MultiDSLA Task List Editor
MultiDSLA Task List Editor

EVS Ready

Test EVS on your network, chipset, or device and validate new performance obtained.

Voice & Audio Streaming Integrity

The unique way to assess your performance of audio streaming over Bluetooth or Wi-Fi.
Detects and records any break or distortion over any test period.
Specially designed for voice control systems (Amazon® EchoTM), car audio systems, or cordless loudspeakers
MultiDSLA Task List Editor


Title/Description Download
MultiDSLA Controller Brochure - English
Voice & Audio Performance Assessment Solution Brochure (Hi. Res.)

4 MB
MultiDSLA Case Study - Gamma Telecom
Case study of an usage of MultiDSLA for monitoring the telephony services (Hi. Res.)

333 KB
SIP load testing with MultiDSLA - English
Test telephony infrastructure and IVR with large number of call

282 KB
MultiDSLA Controller Brochure - French
Voice & Audio Performance Assessment Solution Brochure (Hi. Res.)

4 MB
Title/Description Download
MultiDSLA Controller Spec Sheet- English
List and description of MultiDSLA Controller Specs

1 MB
MultiDSLA Nodes Spec Sheet - English
List and descriptions of MultiDSLA Nodes Specs

2.1 MB


MultiDSLA Host PC

Minimum Recommended Specs

MultiDSLA Controller

CPU Intel Core i5 processor or equivalent
Memory 2 GB
Network Interface 10 Mbps Ethernet
Operating System

Windows Server 2012 R2, Windows Server 2016, Windows 7 Professional SP1, or Windows 10 Professional

Screen Resolution

1024 x 768 pixels



MultiDSLA Controller

#Nodes supported 100’s (depending on number of simultaneous tests required)

Controller Seats
(Add'l User Interface Application)

MS SQL Database Can reside within MultiDSLA Controller PC or on an independent server

Measurement Summary


MultiDSLA Controller

Scores POLQA, PESQ, E-Model, PEAQ with graphical analytics
Supported Measurement ITU Standards
  • ITU-T Rec. P.56: Mean Active Speech Level
  • ITU-T Rec. P862, P862.1, P862.2: PESQ
  • ITU-T Rec. P863: POLQA
  • ITU-R BS. 1387 : PEAQ
  • ITU-T Rec. G.107 E-Model
Signal Levels Mean Active, Peak, and RMS speech levels
Delay One-way delay, Delay variation, and round-trip
  • Up to three echos, level, loss, delay (analog domain)
  • Simulation of echo signal and delay for echo cancellation performance assessment