Voice / Video / Data

Automated Analog (2-wire, 4- wire) Voice Quality Testing

Automated land line Voice Quality Testing


Assuring uninterrupted high quality voice within a network is critical irrespective of the type of network carrying the voice. Testing these networks can become cumbersome, time consuming and quite costly.
GL provides the solution for testing 2-wire and 4-Wire WB Analog interfaces using GL's VQuad™ and  Dual UTA HD.

VQuad™ with Dual UTA HD provides a complete automated network testing solution. This includes 2-wire WB Analog FXO interfaces (RJ-11) and, when coupled with the GL VQT, provides the necessary voice quality measurement and analysis tools.

Dual UTA HD 2-Wire FXO and 4-Wire Analog supports both Wide Band (WB) and Narrow Band (NB). 2-Wire Analog FXO can connect to any 2-wire interface (PSTN, ATA, Gateway) anywhere. Dual UTA HD 4-wire Analog connects to Balanced (headset -mic/speaker), RJ22 (phone Handset), PTT (Push to Talk) connecting to any mobile radio (DoD, Emergency Services, Government) and to any mobile phone, the phone will recognize the Dual UTA HD as a headset.

The analog ports may be connected to any U.S or European PSTN and, using the user-friendly VQuad™ GUI, the user can place calls to any desirable number as well as answer incoming calls in a manual or automated manner. The product can be configured manually to send and record voice files or configured to automatically send/record multiple voice files to be used in the VQT algorithms. In addition, the VQuad™ can send and detect DTMF digits while the call is established. This allows two-stage dialing as well as path confirmation.

The VQuad™ with Dual UTA HD also adds the functionality for Round Trip Delay and One Way Delay measurements. The Dual UTA HD also support Echo measurements, multiple tone detection (including busy, fast busy, SIT), Caller ID detection and display, and Flash Hook. The Dual UTA HD FXO is fully user configurable and allows any type of connection and multiple stage dialing (including immediate connect for PBX systems). For more details, please visit Dual UTA HD.

Main Features

VQuad™ w/ Dual UTA HD in Analog interface

  • Two Analog FXO ports per Dual UTA HD (RJ-11 interface)
  • Manual or Automatic operation of traffic generation and full call control
  • Round Trip Delay and One Way Delay measurements as well as Echo Measurements
  • Supports all standard and customized call progress tones
  • Detect user-defined Dial Tone, Ring Back, Busy, Fast Busy, SIT
  • Send Digits during established call for two-stage dialing and IVR menu systems
  • Both USA and European standards supported (FCC and TBR-21 certified)
  • Remote Access for starting/stopping the tests along with retrieving results
  • GL VQT Automatic Mode supports automatic execution of the VQT algorithms (PESQ, POLQA)
  • Additional measurements include Clipping, Jitter, Latency, Noise and Signal Levels
  • Results available in real-time or post-processing
  • Each analog port may be controlled independently for traffic and call control
  • Fax Testing using the Dual UTA HD 2-wire FXO or 4-wire analog interfaces. Supports up to 4 simultaneous T.30 faxes
VQuad™ Main Window

VQuad™ Main Window

Manual Call Generation

Manual Call Generation

2-Wire Analog WB FXO Testing

2-Wire Analog WB FXO Testing
  • Wide Band (WB) and Narrow Band (NB) support
  • Supports Call Progress tones, Loopcurrent drop and Call ID
  • Supports Flash hook and all supplementary services
  • Global support – can connect to any 2-wire interface anywhere
  • Connect to any PSTN, ATA, Gateway

4-wire WB Analog Testing

4-wire WB Analog Testing
  • Balanced – replaces headset (mic/speaker) anywhere
  • RJ22 – replaces the phone Handset on any phone at the Curly Cord
  • PTT (Push to Talk) – connect to any mobile radio (DoD, Emergency Services, Government) and supports voice and keying the radio
  • Mobile – connect to any mobile phone, the phone will recognize the Dual UTA HD as a headset.

24-Port VQuad™ HD Analog Phone Simulator

VQuad™ 24 Port HD Unit

VQuad™ 24 Port HD Unit

VQuad™ 24-port HD FXO solution is an all-in-one 2U rack supporting both Wide Band (WB) and Narrow Band (NB) Audio. The 2U VQuad™ HD FXO system incorporates two embedded SBCs (Single Board Computer), each running latest VQuad™ software, along with 12 Dual UTA HD units supporting a total 24 FXO Analog ports. All 24 FXO ports are independent and can be fully automated or remote controlled for a fully autonomous test solution. Access to the 24 Analog ports is via an Amphenol connector on the back of the system which can be broken out to 24 RJ11 connections. Each embedded SBC includes two Gigabit Ethernet connections, two USB connections, and a VGA monitor connection. LED lights on the front of the 2U Rack display status of each SBC along with each Dual UTA HD.

Multiple VQuad 24-Port FXO Racks can be connected together for virtually unlimited FXO ports. When combined with the WebViewer Central System all results and events can be saved directly to a Central Database and accessed using the WebViewer (direct access to the database tables is also available). Analysis is provided using GL Voice Quality Analysis (both POLQA and PESQ supported), Echo Measurement Utility (EMU), Fax Analysis, and Voice Band Analyzer (VBA).

  • Supports 24 independent HD FXO ports per VQuad™ system (2U)
  • Scalable solution for unlimited number of FXO ports
  • Wide Band (WB) and Narrow Band (NB) support (for HD and SD Audio)
  • Multiple Users and Tests per system
  • Run tests between systems
  • Fully automated and remote accessible via CLI
  • Remote accessible via Central Database
  • Full FXO Functionality and Analysis via flexible Scripts

Voice Quality Testing (VQT)

GL's VQT may be executed automatically (real-time and/or post-processing) or manually by entering a Reference File and Degraded File. Regardless of how GL's VQT is initiated, algorithms for POLQA, PESQ MOS and PESQ LQ are executed simultaneously for the two voice files and results are shown in graphically as well as in tabular format. GL’s VQT supports POLQA WB Analysis (ITU-P.863). GL's VQT also displays cumulative statistics for large scale testing over long periods of time.

VQT Measurement Results

VQT Measurement Results

VQT Cumulative Statistics

VQT Cumulative Statistics


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
  VQuad™ Miscellaneous
VQT251 Dual UTA HD Next generation Dual UTA with FXO Wideband support
VQT252 Dual UTA HD – Bluetooth Option
VQT461 Dual UTA HD Smartphone ACC Cable
VQT280 VQuad™ Probe HD (with Dual UTA HD)
VQT281 VQuad™ Probe HD w/o Dual UTA HD
VQT285 VQuad™ Probe HD Upgrade
VQT002 Voice Quality Testing (PESQ only)
VQT006 VQT w/ POLQA Server license (no limitations)
VQT007 VQT POLQA v3, server license for 20 nodes
VQT014 AutoVQT™
VQT014U Upgrade from VQT POLQA to AutoVQT™
VBA032 Near Real-time Voice-band Analyzer
EMU037 Echo Measurement Utility (EMU) Software
VQT040 WebViewer™