Overview |
Network Monitor VQT Components |
VQuad™ Command Center |
Voice Quality Testing(VQT)
Distributed VQuad™ Node |
Remote Client NetViewer™ |
Remote Client WebViewer™ |
Buyer's Guide
Overview
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
and 4G 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.
The Network Monitor Voice Quality Testing solution from GL Communications provides a complete solution for Wireless,
VoIP, TDM and PSTN telecommunication operators
The solution consists of 4 parts:
- Distributed VQuad™ Nodes - These nodes control individual or multiple wireless, landline
or VoIP telephony terminals.
- 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.
- Remote Client NetViewer™ - Remotely monitors and controls centralized command center and
each Distributed VQuad™ Nodes
- Remote Client WebViewer™ - facilitates a voice quality test result display using a simple
web browser. Click here to view demonstration of VQT Webviewer™.
Network Monitor VQT Components
VQuad™ Command Center
It consists of Voice Quality Testing (VQT) software, Command Center software, and File Transfer Utility software. 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
- File Transfer Utility - Automatically gathers and transfers degraded voice collected from the individual
VQuad™ nodes to the RCC
- VQT Measurements - Displays real-time call control information, calculates voice quality scores based on
ITU P.862/862.1 (PESQ LQ/LQO/WB) algorithms, Round Trip Delay (RTD) measurements, One Way Delay (OWD) and statistical information of
entire region.
Screen Shot of VQuad™ Command Center
Screen Shot of File Transfer Utility
Distributed VQuad™ Node (Network Node)
VQuad™ Node Sites make and receive calls under control of the RCN. Each individual node provides call control automation through scripts.
Each VQuad™ node site can be equipped with interfaces for:
- Wireless Units, (i.e. Mobile phone, Military/Mobile radio, Bluetooth™, WiMax, WiFi) Analog / Digital / VoIP Phone Handsets
- Analog / Digital / VoIP Phone Handsets
- FXO Analog Interfaces, i.e. 2-Wire PSTN
- VoIP Ethernet, SIP Call Control Interface (connect directly to any SoftPhone or any digital/VoIP hardware phone)
- T1 E1 (PRI ISDN/CAS) Interface
The VQuad™ is used to transmit sample voice files (Reference) as well as record voice at the opposite end of the
network (Degraded). The Degraded Voice files are used within the GL VQT application in order to produce VQT measurements.
Each VQuad™ also supports complete bi-directional testing.
Main Features
- Each VQuad™ Node remotely controls far end Network Node.
- Provides automated call control through scripting
- 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 quality testing of mobile phones and provide VQT measurement results along with VQT analysis results
- Automatic Round Trip Delay (RTD), One Way Delay (OWD), and Echo measurements 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
- PacketGen™ is used to simulate VoIP (SIP) network's voice communications and provide automated degraded voice collecting service for VoIP networks.
- Manual or Automatic call control (SIP protocol) with user-defined parameters for authentication and proxy
2-Wire Analog (POTS)
- Two Analog ports per Dual UTA using industry standard RJ-11 connections.
- DCOSS APS and ATS are also used to automatically collecting degraded voice for current traditional PSTN networks.
TDM Interface
- VQuad™ with T1/E1Analyzer Ssupports 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.
Screen Shot of VQuad™
Remote Client NetViewer™
The Remote Client NetViewer™ (RCN) can control many RCC's, individual VQuad™ node sites and the VQT Measurement process.
Main Features
- Accessible remotely via TCP/IP, multi-user support, and user-friendly interface
- Remotely monitors the status of centralized command center, and each distributed VQuad™ node providing real-time script flow of each individual test
- Also used to build/edit individual VQuad™ Site scripts as well as the RCC VQuad™ Command Center automation scripts
- Provides database query methods in order to query VQT results, and gather status, statistics, events and error information of entire region.
- Remotely controls operations of command center and distributed VQuad™ nodes,
- Remotely start/stop the automation test,
- Restart VQT, VQuad™ Command Center script
- Query/display the RCC VQT results (including MOS, Jitter, Clipping, Levels, and RTD)
- Retrieve overall status of each individual VQuad™ site as well as the RCC
- Retrieve individual site logs, RCC logs, Call Control logs, and complete statistics of the entire region
- Results are displayed both in tabular and graphical formats.
- Provides ITS Viewer functionality software to plot the VQT measurements on the ITS (Indoor Tracking System) map
Screen Shot of NetViewer™
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, ATS, 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, PAMS, 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 GL’s Voice Quality Testing capabilities.
Screen Shot of VQT Main Screen
Remote Client WebViewer™
GL's VQT WebViewer™ facilitates a voice quality test result display using a simple web browser. The results are accessed
from database that stores real-time and historic data. GL’s 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.
- Multiple VQT applications automatically save all results to a centralized VQT database.
- VQT 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
Click here to view demonstration of VQT Webviewer™.
Screen Shot of WebViewer™
Buyer's Guide
* Specifications are subject to change without notice.
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