2-Wire Analog (POTS)

Overview | Main Features | Buyer's Guide

Overview

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

Both hardware options provide the complete automated network testing solution. This includes up to four analog 2-wire interfaces (RJ-11) and, when coupled with the GL VQT, provides the necessary voice quality measurement and analysis tools.

The analog ports may be connected to any US 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 a multitude of voice files to be used in the VQT algorithms. While in automode, the GL VQT may be configured to automatically perform the VQT algorithms immediately after the recorded voice file is complete. Each analog port may act independently (up to four different tests simultaneously) or the user may configure multiple pairs of synchronized analog ports (improved handling of call control and sending/recording voice files). 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.

		2-Wire Voice Capture User's Guide

		VQuad™ User's Guide

		VQT WebViewer™ User's Guide

		2-Wire Voice Capture Brochure

		Dual UTA Brochure

		Complete VQT Brochure

		View Presentation

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

The GL VQT utilizes three widely accepted algorithms to perform the voice comparisons, the Perceptual Evaluation of Speech Quality (PESQ LQ/LQO/WB) per Rec. P.862/P862.1/2, the Perceptual Analysis / Measurement System (PAMS) per Rec. P.800, and the Perceptual Speech Quality Measurement (PSQM) per Rec. P.861. PESQ is most widely used and provides the necessary MOS based on both standard 8000 sample files as well as WideBand 16,000 sample files. The PESQ algorithm also provides additional analysis including jitter, levels, clipping, and per utterance measurements. The GL VQT performs PESQ, PAMS, and PSQM (+) simultaneously, using two voice files (Reference File and Degraded File) and provides the algorithm results along with analytical results in both a graphical and tabular format.

Additional Information

VQT Software
VQuad™
Testing VoIP, Analog and Digital Phones
Testing voice quality on VoIP ATAs
For increased 2-wire capacity, please visit the DCOSS APS webpage

Main Features:

VQuad™ w/ Dual UTA

Multiple Analog ports using industry standard RJ-11 connections.
Manual or Automatic operation of traffic generation and full call control
Round Trip Delay and One Way Delay measurements
Echo Measurements
Detect user-defined Dial Tone, Ring Back, Busy, Fast Busy, SIT.
Send Digits during established call for two-stage dialing and IVR menu systems
Caller ID
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 allows automatic execution of the VQT algorithms (PESQ, PAMS, PSQM+).
Additional measurements include Clipping, Jitter, Latency, Noise and Signal Levels.
Results available in post-processing
Each analog port may be controlled independently for traffic and call control

Screen Shot of VQuad™ Main Window

Screen Shot of VQuad™ Manual Call Generation

Screen Shot of VQT Waveform/Spectral Viewer

Screen Shot of VQT PESQ Measurement Window

Screen Shot of VQT Measurement Results

Screen Shot of VQT Cumulative Statistics

Buyer's Guide:

Item No.	VQuad™ Network Options
VQT010	VQuad™ Software (Stand Alone)
VQT013	VQuad™ with SIP (VoIP) Call Control
VQT015	VQuad™ with T1 E1 Call Control
Item No.	VQuad™ Miscellaneous
VQT204 VQT204u VQT204e	GPS for Dual UTA
VQT030	Network Command Center (Multi-Node Command and Control Center for VQuad™ Systems)
VQT241	Dual Universal Telephony Adapter (UTA)
Item No.	VQT
VQT002	Voice Quality Testing (PESQ only)
VQT004	Voice Quality Testing (PAMS, PSQM, PESQ)
VBA032	Near Real-time Voice-band Analyzer
EMU037	Echo Measurement Utility (EMU) Software

* Specifications are subject to change without notice.

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