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Voice Quality Analysis with POLQA
(Next Generation Voice Quality Testing Standard for Fixed, Mobile & IP Networks)

Overview | Main Features | VQuad™ with Dual UTA HD | Voice Quality Testing (VQT)
| WebViewer™ | Buyers Guide


Perceptual Objective Listening Quality Analysis (POLQA), the successor of PESQ (ITU-T P.862) analysis, is the next generation voice quality testing standard for fixed, mobile and IP-based networks. Based on ITU standard ITU-T P.863, POLQA supports the latest HD-quality speech coding, and higher-bandwidth audio signals suitable for Fixed, Wireless (3G, 4G/LTE) and VoIP networks. 

The POLQA algorithm handles the higher bandwidth audio signals. POLQA supports measurements in the narrow band (NB, 300-3400 Hz), and significant new capabilities for wideband (WB, 100 - 7000 Hz), and super-wideband (SWB, 50-14000 Hz), commonly found in VoIP and next generation mobile networks.

GL's enhanced VQuad™ and stand-alone Voice Quality Testing (VQT) software, both support the next-generation voice quality testing standard for fixed, mobile and IP-based networks using POLQA (ITU-T P.863). As part of the POLQA analysis, results include POLQA MOS, E-Model, Signal Level, Noise Level, and Jitter. Automated voice quality testing using POLQA can be performed through scripting in VQuad™.

pdf VQT VQuad™ POLQA Brochure
pdf Product Brochure
pdf ITU Algorithms Guide
Supported Codecs
View Presentation
pdf GL Product Lists

The VQT also supports other international standard voice quality test methods including PESQ (ITU-T P.862), PESQ LQ / LQO (P.862.1), PESQ WB (P.862.2), PAMS (ITU-T P.800), and PSQM/PSQM+ (ITU-T P.861).

The VQT software can work either independently, in conjunction with VQuad™ - Dual UTA HD, or in conjunction with VQuad™ Probe HD. Using GL’s VQuad™ application along with the Dual UTA HD, or all-in-one VQuad™ Probe HD, voice, video, and data tests are supported for practically any end-point (customer experience) interfaces. The VQuad™ Probe HD (combines with VQuad™-Dual UTA HD - PC into one single box) provides multiple interfaces for connecting to any communication device on a network using an efficient, portable, single box solution.  The VQuad™ Probe HD can work with variety of networks, including Wireless (Bluetooth®, Wi-fi, 3G, 4G, LTE, PTT), VoIP, Analog, and TDM, practically allowing any end-point interfaces to be tested for voice, data, and video quality. Various associated applications (Voice QualityVideo QualityData testsEcho and Delay testsFax testsVBA) works with VQuad™ Probe HD to provide "end-to-end assessment" with additional test and measuring capabilities. All the applications work in conjunction with the VQuad™ for automatically and remotely analysing the captured data and sending the test results to the central database. You can query results or control the tests remotely using web-based WebViewer™.

Main Features

  • POLQA testing is available in VQuad™, VQT, and Webviewer™
  • Manual or Automated mode of operations using GL's VQuad™, or MAPS™
  • VQT software includes all the industry standard voice quality analysis methods - POLQA, PESQ, PAMS, and PSQM
  • FR (Full Reference algorithm) measurements with high accuracy for dedicated tests in live networks
  • POLQA analysis results include POLQA MOS, E-Model, Signal Level, Noise Level, and Jitter
  • Real-time mapping (most countries supported) of results with GPS option used in conjunction with VQuad™.
  • The results can be accessed remotely from a database,  queried and displayed in web browser using WebViewer™ either in tabular or graphic format

POLQA support within Voice Quality Testing (VQT) and VQuad™

GL's stand-alone Voice Quality Testing (VQT) software, supports the next-generation voice quality testing standard for fixed, mobile and IP-based networks using POLQA (ITU-T P.863). Besides, VQT software also utilizes widely accepted algorithms to perform the voice signal analysis, including PESQ (ITU-T P.862), PESQ LQ / LQO (P.862.1), PESQ WB (P.862.2), PAMS (ITU-T P.800), and PSQM/PSQM+ (ITU-T P.861).

The VQT can be used with any GL call capture and analysis application such as T1 E1 CCA, PacketScan™, VQuad™ and other products that can record or generate voice files over live network.

The GL VQT software automatically analyzes the degraded voice files while sending the results to a central database. The results associated with the POLQA analysis include POLQA MOS, E-Model, Signal Level, Noise Level, and Jitter.

For more details, please visit our web page

As an additional feature, POLQA is added directly to VQuad™ software with support for automated testing within the VQuad™ script. In this scenario, the degraded voice files remain at the VQuad™ node for analysis and display within the VQuad™ software. For more details, please visit our web page

VQT POLQA Measurements and Analysis

VQuad™ with POLQA Events Log

Automated VQT with POLQA through Scripts


GL's WebViewer™ provides the method to display and access, in real time, the entire VQuad™/VQT network including all individual VQuad™ Probes HD as well as the central location. Current status of the entire test is displayed along with customized user statistics and results of the active tests.

The results/events associated with the VQuad™ and the VQT analysis is sent to the central database and can be queried using the GL WebViewer™ (web browser). Outputs of the query can be displayed in tabular or graphical format while also output to Excel® or Text. Results can also be displayed in Google Maps (GPS connectivity is required).

For details, visit webpage.

WebViewer™ displaying VQT POLQA Measurements

POLQA results plotted on Google MAPS

Buyer's Guide:

Item No VQT and Analysis


Voice Quality Testing (POLQA) for VQuad™


VQT w/ POLQA Server License


Voice Quality Testing (PESQ only)


Near Real-time Voice-band Analyzer


Echo Measurement Utility (EMU) Software



Item No. VQuad™ Network Options
VQT010 VQuad™ Software (Stand Alone)
VQT280 VQuad™ Probe HD (with Dual UTA HD)
VQT281 VQuad™ Probe HD w/o Dual UTA HD
VQT285 VQuad™ Probe HD Upgrade
Item No. VQuad™ Network Options
VQT013 VQuad™ with SIP (VoIP) Call Control
VQT015 VQuad™ with T1 E1 Call Control
VQT251 Dual UTA HD Next generation Dual UTA with FXO Wideband support
VQT252 Dual UTA HD – Bluetooth Option
Item No. VQuad™ Miscellaneous
VQT601 Mobile Device Controller (MDC) Software
VQT600 VQuad™ NetTest Data Server Solution
VQT610 Target Data Server
VQuad™ Fax Emulation (2 simultaneous ports)
VQuad™ Fax Emulation (8 simultaneous ports)
VBA038 FaxScan™ for PCM
PKV104 FaxScan™ for SIP and Fax over IP (T.38)
VQT030 Network Command Center (Multi-Node Command and Control Center for VQuad™ Systems)
VQT442 (cable) Mobile Audio Interface for Smartphones
VQT443 (cable) 3-wire headset interface Adaptor for Smartphones

* Specifications are subject to change without notice.

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