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Intrusive Network Voice Quality Testing

Overview | Network Monitor VQT Components | Distributed VQuad™ Node | Voice Quality Testing(VQT)
Voice Band Analysis (VBA) | Echo Measurement Utility (EMU) Software | NetTest from PC and Mobile devices | Remote Client WebViewer™ | VQuad™ Command Center | Buyer's Guide

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Today's telecommunication network is a combination of Wireless networks, VoIP networks and traditional PSTN networks. With voice communication traversing through varieties of bearer networks, maintaining voice quality for Wireless networks and VoIP networks is very necessary because of the limitations of their networking characteristics and technical immaturity.

In these years of development of modern telecommunication networks, implementations of new technologies such as NGN, 3G, 4G and LTE voice quality has become critical to the customer. Service operators require a complete voice quality testing solution in order to verify the quality of their service, therefore provide a better service for the customer.

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The Network Monitor Voice Quality Testing solution from GL Communications provides a complete solution for Wireless, VoIP, TDM and PSTN telecommunication operators

Simple and effective methods of testing voice and data are sorely needed - GLís mobile test solution provides this capability with the flexibility of connecting to and between any network, any service, and any interface.

The solution consists of 4 parts:

  • Distributed VQuad™ Nodes - These nodes control individual or multiple wireless, landline or VoIP telephony terminals. All the results including Voice, Data (NetTest), Video analysis, Echo measurements, Fax events are automatically transferred to the Central Database for access via the GL WebViewer™.

  • Voice Quality Testing Software (VQT) - provide PESQ LQ results based on ITU-P.862.1/2 specifications. Fully automated and remotely accessible. All results are automatically transferred to the Central Database for access via the GL WebViewer™. Included with the PESQ results are Jitter, Clipping, Signal and Noise Levels.

  • Remote Client WebViewer™ - remotely access all results associated with the VQuad test including Call Control (Call Failure and Call Dropped), Voice Quality, Round Trip Delay, One Way Delay, Echo Measurement, Data Testing, Fax events from PC or Mobile Device. Provide user-defined reports as well as statistics. Remotely view status of entire network with ability to remotely control any node within network from the WebViewer™ web page. Click here to view demonstration of Webviewer™.

  • VQuad™ Command Center - The command center remotely controls multiple Distributed VQuad™ Nodes (Network nodes or Distributed Degraded Voice Collecting Sites), performs voice quality analysis, and RTD measurements.

Network Monitor VQT Components

Distributed VQuad™ Node (Network Node)

VQuad™ Node Sites can connect to any mobile, landline or VoIP device and provide automated Voice and Data Quality analysis on the associated network. Each individual node provides call control automation through scripts. VQuad™ Scripting, portability for mobile drive testing, remote accessibility, and centralized data retrieval, analysis and control are just a few attributes of GLís next generation Voice and Data Testing solution.

Each VQuad™ node site can be equipped with interfaces for:

  • Any Communication Device (Mobile phone, Smart phones (iPhone, Android), Military/Mobile radio, Bluetooth®, WiMax, WiFi)

  • 2-Wire POTS (connect to PSTN, ATA, Media Gateway)

  • SIP Call Agent (simulate SIP softphone and configure Proxy and Registrar)

  • VoIP Ethernet (connects directly to any SoftPhone or any digital/VoIP hardware phone)

  • Analog / Digital / VoIP Phone Handsets

  • T1 E1 (PRI ISDN/CAS) Interface, SS7 coming soon

The VQuad™ is used for Call Control of a variety of interfaces, VQT testing (transmitting sample Reference voice files and recording Degraded voice at the far-end), Network Delay testing, Echo Measurement testing, Data Testing (NetTest results from PC and Mobile Devices), and Fax Tx Rx testing of the network. Each VQuad™ supports complete bi-directional testing.

Main Features

  • Each local VQuad™ Node can control remote VQuad™ systems to expand testing for an entire network. All results and events are automatically transferred to a Central Database (optional WebViewer™ required).
  • Testing mobile end-to-end voice, data, and video quality
  • Echo Measurement testing over TDM, VoIP, 2-Wire, and Wireless using Echo Measurement and Analysis (EMU)
  • Automated Data Testing for Apple/Android Mobile Devices and for PC Internet connection (Broadband 3G/4G, WiFi, Wired) including TCP, UDP, VoIP, Route, HTTP, FTP, DNS and SMS
  • Data testing supports remotely deployed GL Data Server target points for end-to-end testing.
  • Fax Testing using the Dual UTA 2-wire FXO or 4-wire analog interfaces. Supports up to 4 simultaneous T.30 faxes
  • Enhanced VQuad™ scripting for generating a variety of automated Voice and Data quality tests.
  • Simulates voice communications and collects degraded voice for each network node.
  • GL VQT Automatic Mode allows automatic execution of the VQT algorithms (PESQ LQ/LQO/WB, PAMS, PSQM+)

    Wireless Phones / Radios

  • End-to-end voice and data testing of mobile phones, Smart phones (iPhone, Android), Military/Mobile radio, Bluetooth®, WiMax, and WiFi
  • Automatic Round Trip Delay (RTD), One Way Delay (OWD), Data Test (NetTest) results, Echo measurements and Fax events with complete results sent to GL VQT

    GPS and ITS

  • The Indoor Tracking System (ITS) in VQuad™ is developed to test the VQT in remote and unreachable GPS signal locations
  • The GPS mapping provides real-time GPS information during the VQuad™ test as well as saved to the VQT database.

    VoIP Interface

  • Automated SIP Call Control along with send/receive voice files over already established calls
  • Manual or Automatic call control (SIP protocol) with user-defined parameters for authentication and proxy
  • EC Testing and Measurements, Data Testing from PC or Mobile Device, Round Trip Delay ,and One Way Delay Measurements

    2-Wire Analog (POTS)

  • Two Analog ports per Dual UTA using industry standard RJ-11 connections.
  • Caller ID and Loop Current Detection fully supported.
  • Supports all standard and customized call progress tones.
  • EC Testing and Measurements, Round Trip Delay, and One Way Delay Measurements.
  • 2-wire FXO and 4-wire analog supports fax generation

    TDM Interface

  • VQuad™ with T1/E1 Analyzer Ssupports Call Control for PRI ISDN and CAS Protocols, SS7 coming soon
  • Also supports No Call Control (NOCC), where the T1/E1 call is connected without any call control required.
  • EC Testing and Measurements, and VQT analysis

Screen Shot of VQuad™

Voice Quality Testing (VQT) Software

GL's Voice Quality Testing (VQT) software requires two files for operation. These files are typically referred to as the 'reference' and 'degraded' files. The software can act as a stand-alone product or can work along side with other GL products, including VQuad™, DCOSS APS, PacketGen™, etc. After this process has taken place the VQT software automatically compares the two files ('reference' and 'degraded') and provides an ITU-standard score (PESQ, PAMS and PSQM).

The algorithms supported by the GL VQT include

  • Perceptual Analysis/Measurement System (PAMS ) per ITU Rec. P.800,

  • Perceptual Speech Quality Measurement (PSQM/PSQM+) per Rec. P.861, and

  • Perceptual Evaluation of Speech Quality (PESQ) per Rec. P.862.1 and P.862.2

In addition to the standard PESQ score, the GL VQT also provides the PESQ LQ, LQO (P.862.1) and WB (P.862.2) score. These revised scores exhibits better correlation to subjective listening quality test scores.

Main Features:

  • Provides a user-friendly interface

  • Allows users to perform manual or automated voice quality assessments

  • Results of the VQT algorithms, PESQ LQ/LQO/WB, are displayed both in tabular as well as graphical formats.

  • Displays additional analytical results such as jitter, clipping, noise level, and delay (end to end as well as per speech utterance).

  • VQT system statistics (includes minimum/maximum/average values of PESQ/ PAMS/PSQM, Jitter, Clipping, Noise level, Delay, rating history, score history …) is displayed graphically and in form format.

  • Supports saving results to a file for post processing

  • Sophisticated search features on the results within the VQT application.

Click here to get more information on GLís Voice Quality Testing capabilities.

Screen Shot of VQT Main Screen

Voice Band Analysis (VBA)

The Near Real-time Voice-band Analyzer (VBA) is an analysis tool for monitoring voice band traffic over VoIP, TDM, 2-Wire and wireless network. All results from VBA are automatically sent to WebViewer™ central database (Oracle or MSAccess). The results that can be queried over web interface include Active Speech Level, Activity Factor, RMS Factor, DC Level, Noise Level, Echo Return Loss, Echo Delay, and Echo Dispersion statistics along with the additional analytical Call information.

For complete details, refer to Near Real-time Voice Band Analyzer webpage

Echo Measurement Utility (EMU) Software

The Echo Measurement Utility is used for Echo, delay, and voice quality analysis of voice calls in VoIP, TDM, 2Wire, and Mobile networks

  • Ability to automate the entire test process using VQuad™ scripting; including sending the results to the central database for access via GLís WebViewer™.
  • EMU uses EMU Client software to automatically detect the incoming degraded voice files and send the measurements to database after analysis
  • Supports both line and acoustic echo measurements

For complete details, refer to Echo Measurement Utility webpage.

NetTest from PC and Mobile devices

GLís VQuad™ solution is enhanced to support Data Testing using the NetTest application from PC and from mobile device (using Mobile Device Controller).

Using the VQuad™-NetTest package along with a standard PC internet connection, automated tests including TCP, UDP, HTTP, VoIP, Route, FTP, DNS and SMS are supported. The PC internet connection can be wired Ethernet, WiFi, or even Broadband card (both LTE and 3G fully supported).

VQuad™ can send commands (via the VQuad™ scripting) to the Mobile Device Controller for initiating NetTest on any connected Mobile Device. The Mobile Device will run the specified NetTests irrespective of whether the phone is on a voice call or not. All results are retrieved by the MDC and sent directly to the VQuad™.

  • Automated Data Testing (NetTest) including TCP, UDP capacity, VoIP, Route, HTTP, FTP, DNS and SMS.
  • Statistics and complete results are available through the WebViewer for both Mobile Device NetTests and PC based NetTests.
  • Note that the NetTest requires a GL Data Server at each target location. Mobile device communicates with Mobile Device Controller from anywhere in the world
  • Note also that the Mobile Device requires a GL deployed app (Apple or Android based) for operation. Both IOS (iPhone/iPad) and Android supported with downloadable GL app.
  • Network independent, supports 3G, 4G, WiMax, and LTE. PC based supports WiFi, wired, and Broadband card (3G, 4G, LTE).
  • Fully automated and remote testing with all results accessible via WebViewer™.
  • Multiple interfaces connected to same VQuad™ providing simultaneous testing.

For complete details, refer to Automated Data Testing webpage.

Fax Analysis and Simulation

VQuad™ with Dual UTA supports sending and receiving up to 4 independent and simultaneous T.30 faxes. The user can configure the Tx and Rx fax rate from 2400 baud to 33600 baud with V.34 fully supported. Interfaces supported for fax generation include 2-wire FXO and 4-wire analog. Support for additional interfaces such as T1/E1 and VoIP (T.38) are coming soon.

  • Capability of 4 independent and simultaneous T.30 faxes (selectable up to V.34).
  • Supports fax rate ranging from 2400baud up to 33600baud (V.34 fully supported).
  • Supports Fax Tx Rx for 2-wire analog (FXO) and 4-wire analog networks.
  • VQuad™ Fax events includes messages, summary, and errors log.
  • Ability to auto save fax (both East and West directions) to PCM file for enhanced analysis using GL Insight™ and GL Fax Extractor.
  • VQuad™ scripting supports fax send or receive sessionís configurations.
  • Support for additional interfaces such as T1/E1 and VoIP (T.38) are coming soon.

For complete details, refer to Fax Emulation using VQuad™ webpage.

Remote Client WebViewer™

GL's WebViewer™ facilitates VQT, Call Control, DataTest (NetTest for PC and Mobile Devices) results, Echo Measurement, Fax Events and all VQuad™ associated results display using a simple web browser. The results are accessed from database that stores real-time and historic data. GLís VQuad™ is used to transmit/capture the voice files in real-time from various network nodes. The degraded and the reference files are then automatically transferred to GL's VQT, which analyzes the voice files and generates the appropriate PESQ MOS. Additional analytical metrics are also provided as a result of the VQT algorithm including jitter, clipping, and level measurements.

The WebViewer™ can search the database based on a variety of user-defined parameters and display all returned events per timestamp or per call. Also returned are user-defined statistics with both tabular and graphical displays. All results/statistics can be sent to user-defined reports for output to Text or Excel formats.

The WebViewer™ can also display real-time status of the entire VQuad™ Network and remote control any of the nodes associated with the network.

The WebViewer™ is a simple, easy to use Web browser which can operate on both PC and Mac systems (including iPhone and iPad).

  • Multiple VQT applications automatically save all results to a centralized VQT database.

  • WebViewer™ queries the VQT central database and displays the results in both tabular and graphical formats.

  • Multi-user support, and user-friendly interface is remotely accessible via browser based clients (PC and IOS devices supported).

Click here to view demonstration of Webviewer™.

Screen Shot of WebViewer™

VQuad™ Command Center

VQuad™ Command Center controls all network node locations, with each node location comprising of VQuad™ devices (Mobile Bluetooth® / landline phones / VoIP Terminal / FXO / TDM), or DCOSS APS.

The Command Center controls all distributed sites, including actions such as

  • Central Monitoring - Controls and checks the status of all distributed network nodes in real-time. Each Network Node executes individual scripts and is remotely controlled via the RCC VQuad™ Command Center

  • Automation - Provides automation with flexible and easy to use scripting

  • Scheduling - Initiates voice collecting tasks periodically for each site at user-defined time. VQuad™ Command Center customizes daily tasks or repeatable tasks for each VQuad™ Node) along with the entire region

  • E-mail Support - is the ability to provide user-defined automated email associated with VQuad™ errors as well as VQT failed results. The email alerts are user-defined and supports multiple email addresses

Screen Shot of VQuad™ Command Center

Screen Shot of File Monitor Utility

Buyer's Guide

Item No. Item Description
  VQuad™ Network Options
VQT010 VQuad™ Software (Stand Alone)
VQT013 VQuad™ with SIP (VoIP) Call Control
VQT015 VQuad™ with T1 E1 Call Control
VQT242 Dual UTA Bluetooth Option
VQT280 VQuad Probe with Dual UTA HD
VQT270 VQuad™ Probe with Dual UTA
  VQuad™ Miscellaneous
VQT204 GPS for Dual UTA
VQT030 VQuad Command Center (Multi-Node Command and Control Center for VQuad™ Systems)
VQT601 Mobile Device Controller (MDC) Software
VQuad™ Fax Emulation (2 simultaneous ports)
VQuad™ Fax Emulation (8 simultaneous ports)
VQT210 Indoor Tracking System
VQT011 Dual UTA - Software Development Kit (SDK)
VQT241 Dual Universal Telephony Adapter (UTA) with RTD, and OWD
VQT251 Dual UTA HD Next generation Dual UTA with FXO Wideband support
VQT252 Dual UTA HD – Bluetooth Option
VQT442 (cable) Mobile Audio Interface for Smartphones
VQT443 (cable) 3-wire headset interface Adaptor for Smartphones
  VQT Analysis
VQT002 Voice Quality Testing (PESQ only)
VBA032 Near Real-time Voice-band Analyzer
EMU037 Echo Measurement Utility (EMU) Software
VQT040 Webviewer™
  Related Hardware
HDT001/HDE001 Legacy HD T1 or E1 (PCI) Cards with Basic Analyzer Software
UTE001 Portable USB based Dual T1 or E1 Laptop Analyzer with Basic Analyzer Software

* Specifications are subject to change without notice.

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