Voice / Video / Data

Automated Network-Wide Voice Quality Monitoring

Automated network VQT architecture


GL’s Automated System Wide Network Testing solution provides the means to test all telecom networks, using a variety of interfaces, in an automated and unattended fashion. The solution includes support for both intrusive end-points and non-intrusive ‘taps. The intrusive nodes, running GL's VQuad™ software with a USB based hardware component Dual UTA HD, which connects to any network interface, including Mobile Wireless, Smartphone Headset Connection, 2-Wire FXO, 4-Wire Analog, VoIP Softphone, PTT Radio, and T1/E1 PRI and performs automated testing of voice, data, and video quality on the associated network. Non-intrusive nodes are deployed at various points within the VoIP and TDM network for unmanned analytical operation.

GL's VQuad™ along with the Voice Quality Testing (VQT), Echo Measurement Utility (EMU), Voice Band Analyzer (VBA) & NetTest applications allows end-to-end intrusive testing for voice, data and video quality, echo, noise, call failure rates, and other impairments between and within different networks. Finally, Round Trip Delay and One Way Delay measurements are provided directly via the Dual UTA HD hardware.

All events (including call control), CDR's, data test results, Voice Quality Test results, VBA results, Echo measurements, Video Conferencing test results, NetTest results from PC and Mobile devices, errors, and user-defined messages can be automatically sent to a Central Location for storage within the database via simple TCP/IP connections. If the TCP/IP connection is unavailable, results are saved to the local system until the connection is re-established or until the user manually transfers the data to the Central location database.

At the Central location, the measurements are automatically analyzed using a variety of Analytical Tools such as VQT (Voice Quality Testing)EMU (Echo Measurement Utility)Automated Data Testing (NetTest) including TCP, UDP capacity, VoIP, Route, HTTP, FTP, and DNS, and VBA (Voice Band Analyzer) including E-model scores, Call Failure Rates, etc., with all results saved to the database. The Central location also includes a Command Center which can automatically schedule loading, starting and stopping of individual tests throughout the network. Included with the Command Center, an email alert can be generated automatically if certain tests fail, threshold are not met, or nodes become inaccessible within the network. The email alerts are user-defined and supports multiple email addresses.

The GL WebViewer™ browser connects to the Central database via the internet for access to all results and network status. Through the client browser it is possible to remotely access any node associated with the network. Transfer configuration files between the VQuad™ nodes and your local system for enhancements. Automatically send the updated configuration back to the VQuad system (or all VQuad™ systems). Rerun the test using the enhanced VQuad™ configuration, all from the WebViewer™ browser running on either Windows® based or Mac based systems (including iPhone and iPad devices). Results can be queried based on a variety of criteria including time, location, test name, phone number, analysis threshold limits, and user-defined events. The queried results are displayed both in tabular and graphical formats. Also available are statistics and Network wide real-time status. The WebViewer™ can also be used to remotely access individual nodes to create/modify test scripts, load and start/stop test scripts, and perform several other rudimentary operations.

The essential elements of this monitoring system are:

  • VQuad™ along with its associated hardware establishes calls or direct connections between varieties of physical interfaces. The degraded (recorded) voice files along with all events and measurements are automatically transferred from the individual VQuad™ nodes to the Central location database
  • VQT (Voice Quality Testing) , VBA (Voice band Analyzer), EMU (Echo Measurement Utility) and DataTest (NetTest from PC and Mobile Devices) are centrally located (no need for algorithms at every VQuad™ location) and automatically analyze the degraded voice files. Results are saved to the Central database for access via the GL WebViewer™
  • The Central database, either Oracle or MSAccess, is used to store all data collected by the individual probes
  • The WebViewer™ (using a web interface) facilitates the display of real-time and historic data. Also, included is the ability to filter the collected traffic summary and graphically analyze the call volume, MOS, call completion, failed calls, completed calls, PDD, and delay measurement through a simple web browser. The WebViewer™ supports real-time Network status as well as Remote functionality to all configured probes

Main Features

  • All results/measurements/events from VQuad™, VQT, VBA, EMU, Video Conference Testing, Mobile device Controller (NetTest) automatically sent to central database via TCP/IP Results are accessible remotely via browser based clients
  • Automated Data testing using NetTest packages is available for Mobile devices (i.e. iPhone, Android) along with Ethernet connection (wired, WiFi, 3G/4G Broadband card) associated with the PC
  • Manual and automated (scripted) Video Testing on end client devices
  • Multi-user support, and user-friendly interface
  • Remote Control all probes within network using WebViewer™
  • Provides database query methods in order to query VQT, Call Events (Call Failure, Call Dropped, Call ID), Echo Measurements, Data Testing (via Mobile device or PC Ethernet), Video Testing (Android, Windows, and Linux end clients), and Delay Measurement results.
  • Query results based on a variety of mechanisms including, but not limited to, time, device ID, location/test name, result threshold, result condition or value
  • Results are displayed both in tabular and graphical formats
  • Output results to text or Excel file
  • Supports Oracle or MSAccess Central Database for storing real-time and historic data


  • What interfaces are supported in Intrusive Network-wide VQT?

    Using the GL VQuad™ with Dual UTA HD combination, intrusive testing can be performed in an automated manner over a variety of different interface. Supported interfaces include mobile phone (either via Audio Interface or Bluetooth®/ Wifi/ PTT, LTE, PC internet connection (Broadband – 3G, 4G), 2-wire Analog FXO (PSTN, ATA, Gateways), 4-Wire Analog (HATS, Mobile Phone Headset, and any Handset Phone -RJ22 connection), VoIP SIP Softphone (simulate a Softphone or connect to the Softphone), and TDM T1/E1 PRI/CAS, ‘SS7 coming soon’. These intrusive endpoints can place/answer calls, perform call failure rate tests, perform secondary service tests (i.e. 3-way calling, call transfer), and perform a variety of measurements for proper analysis of the established voice call.

  • What interfaces are supported in Non-Intrusive Network-wide VQT?

    Using the GL VQuad™ with TDM, VoIP, and Analog options, non-intrusive testing can be performed seamlessly for unmanned analytical operation.

  • What are different types of measurements / results can be viewed using remote-browser?

    All aspects of the network are tested including Call Failure Rates (CFR), Voice Quality (VQT), Delay Measurements (RTD, OWD, PDD), Voice and Analysis (E-model based MOS scores), Echo Measurements, FAX Analysis results, Video Conference Test results, and Data (NetTest from PC and Mobile devices) measurements. If connecting to a VoIP network the RTP stream are non-intrusively analyzed for PacketLoss and Delay.

    The Dual UTA HD provides a means to accurately measure Round Trip Delay (RTD), One Way Delay (OWD), and Signal to Noise Ratio (SNR). GL’s VQT (Voice Quality Testing) software performs detailed analysis of voice using ITU standard algorithms, POLQA and PESQ. Mean Opinion Score (MOS), speech level, noise level, echo, and other distortions common to voice transmissions are measured. Additional analytical measurements included Echo and E-model MOS scores are provided by GL’s Voice Band Analyzer (VBA).

  • How effective is the automation solution?

    Each VQuad™ node possesses the ability to control its far end termination point using TCP/IP. This allows for a fully synchronous and flexible automated process. Each VQuad™ node also provides call control automation through scripts.

    The Central location includes a Command Center which can automatically schedule loading, starting and stopping of individual tests throughout the network. Included with the Command Center, an email alert can be generated automatically if certain tests fail, threshold are not met, or nodes become inaccessible within the network. The email alerts are user-defined and supports multiple email addresses.

    Remote operation of the Command Center as well as the individual VQuad™ nodes is supported within the WebViewer™ clients. Network status of all nodes and the analysis tools running at the central location are also returned to the WebViewer™ clients. Multiple WebViewer™ clients can access the network and perform database queries simultaneously.

Network Monitor Components

VQuad™ Nodes (Termination Points):

Each VQuad™ device is utilized as an individual node supporting automated interfaces including -

  • Mobile Phones, Bluetooth®, Smartphones, Mobile Radio, WiMax, Wifi, Broadband 3G/4G, Bluetooth, LTE, 2-wire Analog (NB, WB FXO), T1/E1 (PRI/CAS), and VoIP (SIP). The 4-wire Analog interfaces (balanced, handset, mobile radio) can be used in a non-automated fashion or in an automated fashion with additional customer supplied call control functionality via external applications (batch files)
  • Each VQuad™ node can support up to 12 devices, each device fully independent allowing up to 12 simultaneous tests. Individual ports associated with the VQuad™ can call any other VQuad™ device as well as call multiple VQuad™ devices using the flexible script capabilities
  • Multiple Dual UTA HD devices can be connected to a single VQuad™ software/hardware node
VQuad™ Nodes (Termination Points)

Screen Shot of VQuad™

VQuad™ scripting supports -

  • Call control, traffic generation, remote access, data testing, and generating other variety of tests. Additional commands available for Bluetooth® enabled Mobile phones includes RSSI, Battery Level, and Network identity
  • Use of variables for many of the scripting functions. The variables are accessed via user-defined variable files
  • Extremely flexible and complex scripting routines that can effectively test the entire Network. Additional flexibility within the Vquad™ scripting includes Pause and Wait events based on time and call progress (wait for connect, busy, dropped, and failed calls)
  • Ability to connect to a remote VQuad™ locations to perform most of the functions

VQuad™ supports

  • Two-stage dialing is supported by the VQuad™ along with Call ID for most all interfaces and path confirmation once the call is established.
  • Additional analytical measurements supported by VQuad™ include Round Trip Delay (RTD), One Way Delay (OWD), Post Dial Delay (PDD), Signal to Noise Ratio (SNR)
  • Automation of Transmit and Receive voice with synchronous triggering for Voice Quality Analysis.
  • Testing includes Voice Quality and Data Analysis, Call Failure Rates, Dropped Calls, Testing of Data during voice calls. Additional algorithms including C-Message and SNR also available.
  • Data testing is available for Mobile devices (i.e. iPhone, Android) as well as the PC Ethernet connection (wired, WiFi, Broadband (3G or 4G), LTE).
  • Fully automated Video Conference testing and provides Audio and Video MOS QoS results along with several analytical metrics
  • Echo Measurement testing over TDM, VoIP, 2-Wire, 4-Wire and Wireless using Echo Measurement Utility (EMU)
  • Transmit/Receive Voice simultaneously on one side of the call or both ends of the call (requires GPS for accurate timing) for delay measurements as well as echo measurements
  • GPS is available for each VQuad™ node in order to provide both location and precise timing

Central Location (Database, Command Center, Analysis, Search Engines)

  • A centralized database stores all analytical measurements, call events, User Defined Events, Bluetooth® events, Data Test results, VQT results, VBA results and error events associated with the individual VQuad™ nodes. These results, along with the Voice Quality, Delay Measurements and Echo measurement results, are automatically transferred to the central location for processing and analysis. If the TCP/IP connection is unavailable, the transfer process can be handled post-processing in a manual method.
  • Additional information for each result is included within the database and includes timestamp of result or measurement.
  • Supports full remote access and several automated functions which prevent failure of testing operations.
  • Provides hierarchy of scheduling scripts, network status scripts, for controlling all VQuad™ nodes. Also, included with the Command Center is the ability to provide user-defined automated email associated with VQuad™ errors as well as VQT failed results.
VQuad™ Command Center

Screen Shot of VQuad™ Command Center

Analysis (VQT, Additional Algorithms)

  • Automated Voice Quality testing using PESQ (ITU-P.862.1/2), POLQA (ITU-T P.863) algorithm
  • Automated Voice Quality testing using Analog E-Model
  • Automated Analytical results of recorded voice file using Voice Band Analyzer (VBA)
  • VQuad™ with Dual UTA HD provides measurements for Round Trip Delay (RTD), One Way Delay (OWD), Signal-to-Noise Ratio (SNR), and Post Dial Delay (PDD)
  • Automated Echo Measurements for all interfaces
  • Automated Data testing for PC Internet connection (Broadband 3G/4G, WiFi, Wired) and Apple/Android Mobile Devices including TCP, UDP, HTTP, VoIP, Route, FTP and DNS
  • Support for Path Confirmation, and Call Failure Testing
VQT Algorithms

Screen Shot of VQT Algorithms

Database Results (WebViewer™ Search and Display of Results):

  • Centrally located database can be queried using WebViewer™ (using WebServer capability)
  • Search based on time/date range or based on last x-number of records in database
  • Supports user-defined Search Criteria associated with the WebViewer™, you can further define the query based on user-defined criteria such as error call progress events, Call ID, location and/or device ID (to name a few)
  • The WebViewer™ return a full array of results including the Call Events, Measurement Results, VQT or E-Model results along with full Statistics and graphical displays of the current search results
  • Remote operation of the Command Center as well as the individual VQuad™ nodes is supported within the WebViewer™ client. Network status of all nodes and the analysis tools running at the central location are also returned to the WebViewer™ client. Multiple WebViewer™ client can access the network and perform database queries simultaneously.

Screen Shot of WebViewer™


Item No. Description
  VQuad™ Network Options
VQT010 VQuad™ Software (Stand Alone)
VQT013 VQuad™ with SIP (VoIP) Call Control
VQT015 VQuad™ with T1 E1 Call Control
VQT210 Indoor Tracking System
  VQuad™ Hardware
VQT251 Dual UTA HD Next generation Dual UTA with FXO Wideband support
VQT280 VQuad™ Probe HD (with Dual UTA HD)
VQT442 (cable) Mobile Audio Interface for Smartphones
VQT252 Dual UTA HD – Bluetooth Option
VQT461 Dual UTA HD Smartphone ACC Cable
VQT443 (cable) 3-wire headset interface Adaptor for Smartphones
  VQT Analysis
VQT002 Voice Quality Testing (PESQ only)
VQT006 VQT w/ POLQA Server license (no limitations)
VQT007 VQT POLQA v3, server license for 20 nodes
EMU037 Echo Measurement Utility (EMU) Software
VBA032 Near Real-time Voice-band Analyzer
VQT601 Mobile Device Controller (MDC) Software
VBA035 E-Model Analog Algorithm Option
VQT040 WebViewer™

VQT Web Viewer w/ Oracle Database (Perpetual License, 5 Users/Nodes)

VQT041a VQT WebViewer w/ Oracle Database (Perpetual License, Unlimited Users/Nodes)
PKB070 Audio Processing Utility
SA048 Goldwave Software
  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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