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

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person playing the audio controller


Capture al influences on your voice quality  

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 vesrsatile 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 net work.

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

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.


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.

Management report

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

End-user  experience 

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

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.

Speech recognition

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

EVS ready

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

100% open API

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

Voice and 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 Controller Brochure - English.  Voice & Audio Performance Assessment Solution Brochure (Hi. Res.)

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

SIP load testing with MultiDSLA - EnglishTest telephony infrastructure and IVR with large number of call

Datasheets - Spec sheets

MultiDSLA Controller Spec Sheet- English
List and description of MultiDSLA Controller Specs

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

Enterprise MultiDSLA Brochure - English
Legacy Malden Brochure focusing on the Enterprise

Laboratory MultiDSLA Brochure - English 
Legacy Malden Brochure focusing on Labs

Field Test MultiDSLA Brochure - English
Legacy Malden Brochure focusing on Drive Testing


MultiDSLA host pc

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-Mode


Measurement summary