Voice / Video / Data

VQuad™ Probe HD

Self-contained Unit for Voice, Video and Data Testing

VQuad Architecture
Dual UTA HD Hardware

Latest Software

  • VQuad™ Software Ver 10.6.2
  • VQT Software Ver 7.9
  • WebViewer™ Software Ver 5.11
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GL's VQuad™ Probe HD is an all-in-one self-contained node supporting multiple physical interfaces for connecting to practically any wired or wireless network while automatically performing voice and data testing. This comprehensive hardware device incorporates all the features of the current VQuad™ with Dual UTA HD unit such as portability and remote accessibility along with the necessary PC interface. The Probe is designed for easier portability and convenient testing with all the capabilities of the current VQuad™ with Dual UTA HD solution.

The VQuad™ Probe HD is of same length as the current Dual UTA HD hardware, but about twice as high and 50% wider. For exact dimensions, refer to the specifications. The VQuad™ Probe HD supports two independent devices for connecting to endpoints of a single network or two completely separate networks. The VQuad™ Probe HD is configured for control via Ethernet using Remote Desktop (thus not requiring the Keyboard/Mouse).

Following PC interfaces are embedded in the VQuad™ Probe HD:

  • 4 USB ports (can be used as Keyboard/Mouse ports as well as connecting a second Dual UTA HD or T1 E1 Analyzer) 2x USB 2.0 on front & 2x USB 3.0 on back
  • GigaBit Ethernet ports
  • Two HDMI ports (Optional Video port (VGA) to HDMI interface)
  • In-built mSATA solid-state hard drive (256GB)
  • In-built standard 8G memory
  • Intel NUC Core i3 or optional i7 equivalent
  • Windows® 10 64-bit Pro Operating System

There are no moving parts with the VQuad™ Probe HD so reliability and longevity are integral.

OWD Measurement on 5G Networks

VQuad™ Probe HD allows to test variety of networks, including Wireless (Bluetooth®, Wi-fi, 3G, 4G, LTE, PTT Mobile Radio), 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 testsVoice Band Analysis) works with VQuad™ to provide "end-to-end assessment" with additional test and measuring capabilities. Different types of traffic supported includes - NB and HD Voice, Video, Tones, DTMF/MF Digits, Fax, and other Data (HTTP, UDP, TCP, SMS, Email, DNS, Route, and FTP).

Enhanced VQuad™ Probe HD supports two methods of automated testing of mobile devices, Bluetooth and Wired Headset using GL’s new cable, Smartphone with Automated Call Control (ACC). Through the VQuad™ script (or manual operation), calls can be setup and send messages using iPhone SIRI or Android Google Voice available on mobile devices. VQuad™ includes Text-to-Speech technology for automatically creating the necessary voice prompts required to work with Siri or Google Voice.

VQuad™ Probe HD Connections

Front Panel

Side: The VQuad™ Probe HD contains Side 1 and Side 2. These sides (devices) are completely independent of each other, so Mobile Phone Network Testing could be setup on Side 1 while FXO Network Testing could be configured on Side 2.

FXO Jack: The RJ-11 2-wire analog jack gives the VQuad™ Probe HD the ability to act as a telephone. This is a 2-Wire POTS interface that allows users to place calls, answer calls and utilize all of the probe’s voice quality and delay features.

Push-to-Talk (PTT) with LEDs - Side 1 & 2:
 For use with radios that requires activation of a push-to-talk function to transmit or receive audio signals. There are two RJ-45 Jacks (PTT) one for each side of Dual UTA HD. The RJ-45 jack is connected to the software-controlled relay internal to the probe. When PTT is active (PTT LED on), pins 4 & 7 are shorted. A single RJ-45 PTT port includes the TX/RX 4 wires along with 2 wires for PTT operation (keying radio on/off). 

PTT LEDs: When illuminated indicates that the PTT function is active. The active state indicates that the radio has been placed in transmit mode. Conversely, the inactive state (LED off) indicates the radio is in receiving mode. 

Trigger (TRG) LED: When illuminated indicates that a Round-Trip Delay (RTD) or One-Way Delay (OWD) pulse has been detected. This LED may also illuminate momentarily when connecting or disconnecting audio lines.

In Jack: This 3.5 mm jack provides a balanced Audio In port. This jack can connect to a wide variety of the network interfacing equipment. Multiple impedance options are also available with this input.

Out Jack:
 This 3.5 mm jack provides a balanced Audio Out port. This jack can connect to a wide variety of the network interfacing equipment. Multiple impedance options are also available with this output.

Handset (HSET) Jack
: This RJ-22 jack is used with handset-type phones. Connect the curly cord of the handset to this jack.

Monitor Jack:
 This 3.5 mm jack (stereo miniature phone type) provides for connection of a headset or amplified speakers to monitor the Audio In/Out signals on all interfaces.

Power LED:
 When illuminated indicates the VQuad™ Probe HD is receiving power and is ready to operate. The Probe is powered from the pc connection.

USB Jack:
The front panel of the probe includes two USB 2.0 ports

Back Panel

GPS (In): RJ-45 Input jack from external GPS receiver. The VQuad™ Probe HD uses location and time to provide additional information to the user. The one pulse-per-second GPS input will allow 1 ms accurate one-way and round-trip-delay measurements.

GPS (Out): (RJ-45 Output jack) The VQuad™ Probe HD allows the GPS received data on the GPS (In) port to be transmitted out the GPS (Out) port. This enables a single GPS receiver to provide data to multiple Dual UTAs.

Bluetooth® (BT):The VQuad™ Probe HD has Bluetooth® built in, which allows users to connect to Bluetooth® enabled devices. This provides call control (control of phones calling/answering functions), the ability to send/record audio in/out of these devices as well as VoLTE testing supported using Bluetooth®.

PPS:(GPS PPS Yellow/Green LED) When illuminated indicates that the GPS function is active. The active state indicates that the GPS has been placed in transmit mode. Conversely, the inactive state (LED off) indicates the GPS is in receiving mode.

LCK:Programmable LED.

GND:Terminal block for ground connection

HDMI: Two HDMI ports (Optional VGA to HDMI interface), interface to connect to computer monitors or any display units.

USB Jack: Connect a second Dual UTA or T1/E1 Analyzer or any USB device. The probe on the back panel includes two USB 3.0 ports.

2 GBit Ethernet ports used to connect the device to the LAN network using RJ-45 connectors.

Power plug-in port: 12V power supply connection interface.

NUC Power LED: When illuminated indicates the NUC is receiving power and is ready to operate.

On/Off / Reset: ON/Off Switch to turn-on /off the NUC PC. When the Intel NUC is off, press and hold the power button for approximately 3 seconds, and then release to reset BIOS settings.

VQuad™ Probe HD - A Self-Contained Unit with VQuad™, Dual UTA HD, and PC

VQuad™ Probe HD Front and Back Panel View

VQuad™ mTOP™ Solution Brochure

GL's VQuad™ Probe HD solutionis an all-in-one self-contained VQuad™ with Dual UTA HD test instrument designed for conveniently testing multi-interface telephony devices for Smartphone/Handset Benchmark drive testing.

A single VQuad™ Probe HD includes dual independent sides connecting to any type of telephony devices across various interfaces including FXO, 4-wire Analog, PTT, Handset Phones, Mobile audio, and Bluetooth. It has the ability to generate Wireless as well as 2-Wire and 4-wire analog calls using same hardware. You can perform simultaneous Voice, Video, Data, Fax, and Time Delay Measurements from a single VQuad™ Probe HD unit and the embedded SBC allows it to be conveniently used for field/drive testing.

3.5mm In/Out Jacks (Balanced Audio - Side 1 & 2), supports NB (8000 samples/s), WB (16000 samples/s) and SWB (48000 samples/s) Bluetooth Antennas - Side 1 & 2, supports NB (8000 samples/s) and WB (16000 samples/s)

Hardware Specifications

Physical Dimensions

Length: 10.4 inches

Height: 3.0 inches

Width: 8.4 inches

Power requirements

12V, 3Amps Power Supply

External Connections

USB 2.0, & USB 3.0: Type A USB Jack (Communication with Keyboard/Mouse/second Dual-UTA/ USB T1/E1 Analyzer)

3.5mm In/Out Jacks (Balanced Audio - Side 1 & 2)

  • Input Impedance – 600 ohms, 1000 ohms and User-Definable

  • Output Impedance - 600 ohms, 1000 ohms and User-Definable

  • Dual RJ-22 Jacks (Handset/Headset Base - Side 1 & 2)

  • 3.5 mm Output Jack (Monitor)

  • Dual RJ-45 Jacks (PTT - Side 1 & 2 )
    PTT - Side 1 & 2 Input /Output Impedance - 600 ohms, 1000 ohms and User-Definable

  • Dual RJ-45 Stacked Jacks (GPS In/Out - Side 1 & 2 )

  • Bluetooth Antennas - Side 1 & 2

  • GigaBit Ethernet port – LAN connection

SBC specifications

  • Intel Core i3 or optional i7 NUC Equivalent, Windows® 10 64-bit Pro Operating System

  • USB 2.0 or 3.0 Ports, 12v/ 3A Power Supply

  • 256 GB Hard drive, 8G Memory (Min)

Two HDMI ports (Optional VGA to HDMI interface)


CE, FCC, TBR21 compliant

Frequency Range Compliance

FXO PCI card (VQT012)


Dual UTA HD FXO 2-wire interface (8K samples/sec)


Dual UTA HD FXO 2-wire WB interface (16K samples/sec)


Dual UTA HD Balanced, Mobile, PTT, Handset interfaces (8K samples/sec)


Dual UTA HD Balanced, Mobile, PTT, Handset WB interfaces (16K samples/sec)


Dual UTA HD Bluetooth interface (8K samples/sec)


Order information

  • MT005/MT005E

  • VQT270

  • DUAL UTA Options

  • VQuad™ Options

Refer to VQT Price Lists


Network Types

Connectivity - Bluetooth® NB & WB, PTT, GPS, 4-wire Balanced I/O, Interfaces on Dual UTA HD
Devices – Military/Mobile Radios, 4G/3G/Wifi Smartphones (iPhone, Android, Blackberry), Bluetooth® Headsets/Stereo/Car Kits

Wireless networks can impair voice quality by various means including poor mobile phone quality, voice/video compression and decompression algorithms, delay, loss or gain in speech levels, noise, acoustic and landline echo, and other distortions.

GL provides a compact and portable solution for testing Wireless and Mobile Radio devices for voice, video, and data quality using the GL VQuad™ application with the Dual UTA HD, or all-in-one VQuad™ Probe HD. The Dual UTA HD includes interfaces for Push-to-Talk for mobile radios, and Bluetooth for connecting to any mobile phone.

Some of the important features include:

  • Test mobile end-to-end voice, video, and data, quality measurement and analysis results
  • Control Smartphones on any wireless network (Bluetooth®, 5G, VoLTE, VoWiFi, VoFemto, 3G) - - both NB and WB voice supported
  • Mobile Phone call control – supports Bluetooth®, Dual PTT, 3.5mm Output Audio Jack, and Dual 3.5mm In/Out terminations
  • Support for voice quality testing on VoLTE network with AMR Wideband codec (with 16000 Sampling Rate) using Bluetooth® Wideband
  • Control Mobile Radios with Push-to-Talk functionality; Supports radio keying and send/record audio
  • Bluetooth® option for Testing Bluetooth® Phones and Bluetooth® Headsets
  • Bluetooth® also performs RSSI, Battery level functions, and Network identity
  • Impair outgoing traffic using a noise file or user-defined white noise
  • All results along with call control information are sent to central database. Query results remotely using the WebViewer™.
  • Compatible with automated GPS location time-stamping

Some of these applications include

    • Voice Quality Testing (VQT) software for analysis according to widely accepted ITU (International Telecommunications Union) voice comparison algorithms (POLQA, PESQ LQ/LQO/WB)
    • Data Quality Testing (NetTest™)application for performing automated data testing on a wireless or wired network; tests include TCP, UDP, VoIP, Route, HTTP, FTP, DNS, SMS, Email, SIMInfo, Phone Info, and UEInfo
    • Video Quality Testing (VAC™) application for performing fully automated Video Conference testing and get Audio and Video MOS QoS results along with several analytical metrics
    • Echo Measurement Utility (EMU) for echo and delay measurements, including RTD, OWD, ERL, EPD, and more
    • Voice-band Analyzer (VBA) for monitoring voice band traffic (Speech Level, Activity Factor, RMS Factor, DC Level, Noise Level, Jitter, Echo Return Loss, Echo Delay, and Echo Dispersion)
    • Fax Quality Testing for emulation and analysis of T.30 faxes (GLInsight™ or FaxScan™)
    • Drive Testing solution for plotting all results and call control information along with co-ordinates using GPS receiver option in VQuad™, and Google Maps option within WebViewer™
    • WebViewer™ for web based controlling and monitoring VQuad™ nodes over the entire network 

  • Connectivity – 2-Wire FXO, 4-Wire Balanced I/O, HSET Interfaces on Dual UTA HD
  • Devices – Analog Phones, Next Generation Gateways, PBX, ATAs over PSTN network

GL's VQuad™ with Dual UTA HD provides the solution for testing analog 2-wire interfaces (PSTN, ATA, Media Gateway). The Dual UTA HD supports 2 Analog FXO interfaces (RJ11) and provides Off/On- Hook, DTMF Dialing, Flash Hook, Tone Detection (Dialtone, Ringback, Busy, Fast Busy, SIT) and CallerID.

The Dual UTA HD Analog interface supports two-stage dialing, IVR testing, Voice Quality Testing, Delay Measurements, and Echo Measurements.

  • Supports 2 independent FXO ports per Dual UTA HD
  • Dual UTA HD connect to any PSTN, ATA, and next generation Gateways
  • Global support – can connect to any 2-wire interface anywhere
  • Wide Band (WB) and Narrow Band (NB) support (for HD and SD Audio)
  • Manual or Automatic operation of traffic generation and full call control
  • Each analog port may be controlled independently for traffic and call control
  • Supports all standard and customized call progress tones
  • Send/detect DTMF /MF digits, and tones of different frequencies (NB – up to 4 KHz, WB – up to 8KHz, SWB – up to 24 KHz)
  • Support for No Call Control (Quick Connect) on FXO interface 
  • Call control with Caller ID detection and display
  • Impair outgoing traffic using a noise file or user-defined white noise
  • Full FXO Functionality via flexible Scripts
  • All results along with call control information are sent to central database. Query results remotely using the WebViewer™.

  • Additional functionalities –

  • Connectivity – Internal SIP cores within VQuad™ (SIP and H.323 Signaling - Does not require Dual UTA HD), 4-wire Balanced I/O, HSET Interfaces on Dual UTA HD
  • Devices – VoIP Phones, Soft Phone, HATS

With the growing requirements for voice quality testing within VoIP networks, a major concern is testing the VoIP Network, VoIP phones, VoIP Softphones, and Analog Telephone Adaptors (ATA).

GL's VQuad™ with VoIP option, provides the ability to perform manual or automated tests on Softphones in the VoIP network.
The VQuad™ provides direct connection to the VoIP network with up to 12 user agents per VQuad™ connected simultaneously.

  • Manual or Automatic call control (SIP protocol) with user-defined parameters for authentication and proxy
  • SIP Call Control within VQuad™ supports handling up to 4 SIP cores, and support up to 12 User Agents.
  • Time/Digit/Tone triggering of send/receive voice files.
  • Testing Analog Telephone Adapters (ATAs)
  • Supports outband DTMF/MF digits for RFC4733 and RFC2833.
  • Impair outgoing traffic using a noise file or user-defined white noise
  • Supports almost all standard Voice Codecs (G.722, AMR, G.729 & more). 
    For more information to voice-codecs webpage

  • Additional functionalities –

  • Connectivity – T1/E1 Interface facilitated through GL’s T1/E1 Analyzer Hardware (ISDN and CAS Signaling - Does not require Dual UTA HD)
  • Devices – Digital Phones, PBX, Media Gateways

Using the T1/E1 Analyzer, the VQuad™ can generate and receive up to 12 simultaneous CAS or PRI ISDN or No Call Control (NOCC) calls on T1 or E1 trunks. Once the call is up, send/record voice via the VQuad™ to get VQT MOS results.

The T1/E1 option includes a script based CAS State Machine for creating any desired CAS protocol. Included with the PRI ISDN are all variants associated with ANSI and ETSI specifications.

  • Supports Call Control for PRI ISDN and CAS Protocols
  • Also supports No Call Control (NOCC), where the T1/E1 call is connected without any call control required.
  • Send/detect DTMF /MF digits, and tones of different frequencies (NB – up to 4 KHz, WB – up to 8KHz, SWB – up to 24 KHz)
  • Supports up to 12 simultaneous T1/E1 channels using VQuad™ interface
  • Impair outgoing traffic using a noise file or user-defined white noise
  • Additional functionalities –

Test Types

OWD - End points at same location

OWD - End points at separate location

  • One Way Delay (OWD) - VQuad™ includes an advanced method for performing One Way Delay (OWD) measurements using a Correlator algorithm. The Correlator method is extremely accurate and works with the next generation Dual UTA HD
  • Round Trip Delay (RTD) – the new method of measuring RTD using the Correlator algorithm supported on Dual UTA HD
  • Post Dial Delay (PDD)
  • Signal-to-Noise Ratio (SNR = S/N)
  • Oscilloscope and Spectral Display
  • RMS Power as well as C-Message 
  • Audio analysis of any recorded voice file for both Power and Frequency. RMS power and frequency response outputs are necessary for testing the network for full WB voice support.

Audio Analysis

OWD using Correlator

Echo Identification

Acoustic Echo Canceller Testing

  • Supports echo measurements over any network using EMU
  • Assess sidetone, line, and acoustic echo and the corresponding delays.

  • Monitor voice band traffic
  • Measure Active Speech Level, Activity Factor, RMS Factor, DC Level, Noise Level, Echo Return Loss, Echo Delay, and Echo Dispersion statistics.

Automated Voice Quality Measurement

  • Network-independent VQT – Supports legacy, as well as Next Generation networks
  • POLQA (ITU-T P.863)
  • PESQ (ITU-T P.862), PESQ LQ, LQO (P.862.1), PESQ WB (P.862.2)
  • Call control analysis (Failed Calls, Dropped Calls, and Call ID)
  • Monitoring IVR System for voice and data quality
  • Supports PESQ/POLQA (both NB and WB) measurements
  • Supports both Narrow band (NB) and Wideband (WB) audio codecs (both 8k and 16k samples/sec) 
  • Auto detects voice files with wideband attributes
  • All VoIP Codec supported including - G.711, G.711 App II with VAD, G.729, G.726, G.726 with VAD, GSM, AMR NB and WB, EVRC, SMV, iLBC, SPEEX NB and WB, G.722, and G722.1.

Visit Voice Codecs webpage for more comprehensive information.

VQuad™ is enhanced to support Data Testing including TCP, UDP, VoIP, Route, HTTP, FTP, DNS, SMS, Email, PhoneInfo, SimInfo, and UEInfo. The Data Tests are configured via the VQuad™ scripting and supports Wireless devices as well as PC Ethernet connections (wired, WiFi, Broadband 3G/4G, and LTE).

  • Network independent, supports 4G LTE, 3G, WiMax, and Wired Internet connections
  • Supports Mobile devices (i.e. iPhone, Android)
  • Supports PC Ethernet connection (Wired, Wi-Fi, Broadband (3G or 4G))
  • Different type of tests supported – TCP, UDP, HTTP, FTP, DNS, VoIP, Route, SMS, Email, PhoneInfo, SimInfo, and UEInfo.
  • End-to-End SMS Testing over wireless network directly and remotely
  • Remotely perform Data tests from GLNetTestApp on mobile devices (iPhone, Android); this requires connection with Mobile Device Controller server. Mobile device communicates with Mobile Device Controller from anywhere in the world.
  • Fully automated and remote testing with all results accessible via WebViewer™.

VQuad™ can now initiate, control, test, and measure video conferencing services over IP, and Wireless networks, using additional support of a Video Controller/Server and Video Clients (Agents).
Video Tests can be configured between any two active video clients with flexibility of specifying the typical characteristics of the Video test.   Video Test agents generates simulated video calls to other test agents as per these test parameters.

  • Fully automated Video Conference testing performed with QoS results provided along with several analytical metrics
  • Support for Android, PC and Linux based video clients (end points) for active Video Quality Testing
  • Both manual and automated tests are supported
  • Tests can be run directly from the Android phone or using the VQuad™ interface
  • Configure unlimited test plans; video test parameters include Codec, Bandwidth, Latency, Frame Rate, GoP (Group of Pictures) Structure, Echo, and Resolution
  • Test results include Video MOS, Audio MOS, and A/V MOS along with a variety of analytical and quality metrics
  • Fully automated and remote testing with all results accessible via WebViewer™.
  • Drive test with any Wireless device with real-time GPS mapping
  • GPS connectivity for recording timing and location of tests performed
  • The GPS mapping records and adds the real-time GPS information to all test results and VQuad™ call control.
  • GPS Location includes stamping each result with Latitude, Longitude, and GPS Time Stamp
  • The Indoor Tracking System (ITS) in VQuad™ is developed to support VQT in remote locations where GPS signal is unavailable
  • The ITS information (location, timestamp) is saved to the database per VQuad™ Measurement
  • GPS information is automatically sent to central database and accessed via Google Maps feature in WebViewer™.

  • Supports Fax testing (sending and receiving) up to 4 independent and simultaneous T.30 faxes over 2-Wire, and 4-wire analog networks
  • Support higher resolution and multi-page fax TIF files
  • 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.
  • Automatically save the fax session (both East and West directions) to a PCM file.
  • Supports higher resolution and multi-page fax TIF files.
  • Use GLInsight™ or GL Fax Scan analysis software packages for further analysis of the recorded fax files. GL's FaxScan™ can be configured for fully automated analysis.
  • Simulate IVR Users and IVR System
  • Single-box portable solution and Rackmount PC solution for higher density
  • Complete automation with enhanced scripting and remote operation including traffic generation and call control scripting
  • Automate the IVR testing process - call establishment and traffic generation detection process through scripts
  • Monitoring IVR System for voice and data quality
  • Perform Quality of Service (PESQ) or path confirmation tests
  • Within a proper voice call, additional analysis is available such as Round Trip Delay (RTD) and Voice Quality Testing (VQT)
  • Support for Command Line Interface (CLI) to access VQuad™ remotely


Item Description
VQT280 VQuad™ Probe HD (with Dual UTA HD)
VQT281 VQuad™ Probe HD (w/o Dual UTA HD)
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