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The Network Voice Quality Testing Monitoring solution from GL Communications provides a complete intrusive testing solution for any desired network including Wireless, VoIP, Analog, and TDM. This GL solution consists of 5 parts: Distributed VQuad™ Nodes, VQuad Command Center, array of analysis applications, central location database, and Remote Client web-browsers. Many VQuad nodes (termination points) are supported, each VQuad Node supporting up to 8 interfaces, mobile or static. The Central Location includes the database (all analytical results and call progress events), Command Center for a more flexible control/scheduling of the Network tests, and the Analysis algorithms for Voice Quality and Echo Measurements. The viewer (NetViewer or WebViewer) applications provide user-defined querying of the central location database over the internet or local network.

The VQuad™ provides the one box solution for sending/recording voice over a variety of network interfaces in an automated and synchronized manner. The Dual UTA portable USB based hardware provides the support for several of the desired interfaces including Mobile (includes Bluetooth), Analog 2-wire, Phone Handset and Mobile Radio. In addition to sending/recording voice, the VQuad™ also supports automated call control for establishing calls and verifying the call is up prior to sending/recording voice. A GPS option permits time synchronization between two geographically separated systems as well as location information for drive testing. Thus the VQT MOS scores as well as the Call Control information can be plotted to local street maps (most all countries supported). The VQuad™ ITS (Indoor Tracking System) provides the means to add location information to the VQuad™ results when GPS is not available (i.e. Underground Train systems). The ITS works with both the VQuad™ for adding the location references to the user-specified geographical map and the NetViewer™ for viewing the VQT/VQuad™ results overlaid on the ITS geographical map. Network interfaces supported with the VQuad™ include:

• Dual UTA Support:
  • Wireless phone (Bluetooth supported), , WiFi Phone, WiMax Phone
  • 2-wire Analog Simulation (FXO port) for connecting to ATA, PSTN, Switch Router
  • Wireless radio (PTT supported)
  • Phone Handset for connecting to VoIP phones, Digital phones, Analog phones.
  • One Way Delay (OWD) and Round Trip Delay (RTD) measurements supported
• VoIP User Agent Simulation (supports both SIP and H.323 protocols)
• T1/E1 Simulation (supports both CAS and PRI ISDN protocols)
• GPS and ITS location tracking with results overlay

Full support is also available for remote access of the VQuad™ and an SDK directly to the Dual UTA hardware (VQuad™ not required to be running).

VQT Software (Active post-processing testing)

The GL VQT software provides the voice quality measurement and analysis tools for all types of networks carrying voice traffic. The VQT provides the analysis of the recorded voice files using ITU specifications P.862.1 (PESQ), P.862.2 (PESQ WB), P.861 (PSQM), and P.800 (PAMS). The VQT is an intrusive quality of service algorithm that can be executed in an automated fashion along with the VQuad™. For more call density, the software can be used with DCOSS, APS, PacketGen™, or T1/E1 Analysis products. Results are saved to a database that may be queried using the remote NetViewer™ application.

Active & Passive Voice Quality Testing

The VQuad™ provides the one box active QoS solution for sending/recording voice over a variety of network interfaces in an automated and synchronized manner. Using the GL VQT, analysis of the recorded voice files can automatically be executed from the VQuad™ in an intrusive manner. The VQT utilizes the ITU algorithms PESQ LQ/LQO/WB, PSQM, and PAMS. In addition to sending/recording voice, the VQuad™ also supports automated call control for establishing calls and verifying the call is up prior to sending/recording voice.

The GL Passive Quality of Service testing allows one to monitor voice anywhere within a network (using the desired VoIP/TDM/Analog Network probe) and gather statistics and quality of service measurements. The various network probes utilize GL hardware and software applications to support T1/E1, Analog, and VoIP networks. All network probes are non-intrusive and require no active testing on either side of the call. Rather, the non-intrusive Passive Monitoring utilizes the metrics from the voice or VoIP RTP and provides statistics, analytical measurements, and in certain cases MOS results.

Intrusive Network Voice Quality Testing

The Global Network VQT system can be achieved using multiple VQuad™ systems (nodes) at various locations, accessing the network as wireless, analog, VoIP, and TDM. A central VQuad™ Command Center will provide full control of all nodes by running user-defined scripts for all desired tests. The VQT software will provide the voice analysis of all nodes along with additional analytical metrics, round trip delay measurements, jitter, clipping, and call control statistics. Finally, the VQT NetViewer™ and VQT WebViewer™ are used to remotely control the entire system, display real time statistics and status of the entire system, and query the VQT results and display in both tabular and graphical formats.

The NetViewer™ is a stand-alone application that can access the VQT, Command Center and individual VQuad™ applications for remote access for such things as creating configurations/scripts, loading configurations/scripts, and starting/stopping the tests. The NetViewer™ can also remotely query the VQT database and display the results both in tabular and graphical format. The WebViewer™ can access the VQT central database from a web interface for querying the results and displaying in both tabular and graphical formats.

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VQT 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.

MobNetMon™

MobNetMon™ can monitor "off-air" GSM network signals as one drives through a GSM service area. Any of the world's GSM bands can be monitored with the included "quad-band" wireless phone and accompanying software. MobNetMon™ can determine weak points in a wireless network by generating calls, identifing primary and surrounding GSM base stations, decoding GSM protocol messages, including call traces and protocol analysis.

Truly Portable platform for VQuad™ and Dual UTA – NetBook PC  

VQuad™ with the Dual UTA can be purchased with a NetBook PC for a truly lightweight portable solution. The Dual UTA is fully compatible with the miniature NetBook and allows the VQuad™ software to be installed for full testing without any performance issues.

Dual Universal Telephony Adapter (UTA)   

The Dual Universal Telephony Adapter (Dual UTA) is a comprehensive hardware device designed to interface and test the voice quality of telecommunication networks. The Dual UTA features all the circuitry necessary to universally adapt to any telephony instrumentation, such as standard Plain Old Telephone Systems (POTS), digital hybrid interfaces, Voice over Internet Protocol (VoIP) networks, wireless cellular phones and mobile radios including devices that utilize Bluetooth® technology.

Analog Phone Simulator

The DCOSS APS (Analog Phone Simulator) converts a GL DCOSS into an analog phone simulator that simulates a bank of up to 384 analog telephones. Using a basic DCOSS with T1 trunks along with the APSCB24/48 external boxes, the DCOSS APS may be used to test a Central Office (CO), PBX, Gateway, or other telecommunications equipment, which provide local loop interfaces. The DCOSS APS can generate/receive analog calls and send/receive fax, modem, voice files, DTMF/MF digits and Single/Dual Frequency Tones. The DCOSS APS can be executed in manual mode or automated Bulk Calling with scripting support.

DCOSS Digital BRI Phone Simulator (BPS)

The BRI Phone Simulator (BPS) converts GL's DCOSS into a BRI ISDN Terminal Phone Simulator. The BPS can simulate a bank of up to 128 BRI telephones (terminal side), each supporting one D-channel and two B-channels. Supplementary services such as Call Forwarding, Call Hold, Call Transfer, and 3-way Calling are fully supported. All functionality of the DCOSS including fax, modem, voice, digits, call control, scripting, and logging are also fully supported. We also support a higher density solution for BRI Terminal phone simulation (128 BRI phones) using an external BRI box. Using the DCOSS, BRI Network is also supported for 16 BRI ports.

Digital Central Office Switch Simulator

The DCOSS converts any windows based PC (Windows 2000/XP) into a central office complete with T1 and/or E1 trunks as well as Analog and/or BRI ISDN phone interfaces. The DCOSS supports a multitude of protocols including CAS, PRI ISDN, SS7 and GR-303. The DCOSS supports manual and automated Bulk Calling and can simulate a wide variety of traffic.

T1/E1 Analyzer

The T1/E1 Analyzer is a powerful voice band, data, signaling, bit error rate tester, and protocol analyzer. It can perform analysis and emulation of various signal types including voice, digits, and tones; various protocols including HDLC, ISDN, SS7, CAS, Frame Relay, GSM, GPRS, CDMA, MLPPP, ATM, and UMTS. It is capable of T1 or E1 PCM signal visualization, capture, storage, analysis, and emulation.

PacketGen™ - SIP Bulk Call Generator

PacketGen™ is a PC-based real-time VoIP bulk call generator for stress testing and precise analysis of the VoIP network equipment. PacketGen™ is based on a distributed architecture, wherein SIP and RTP software cores can be modularly stacked in one or many PCs to create a scalable high capacity test system. An optional hardware RTP can support 120 real-time voice calls from real phones, or fax calls from fax machines.

PacketScan™ - SIP / H323 / Megaco / MGCP / RTP / RTCP / Video Analysis

PacketScan™ is a real-time VoIP analyzer that captures live IP traffic, and segregates them into SIP/H323 calls and collects statistics about the calls. Applications include testing of IP phones, Gateways, IP Routers and Switches, and Proxies. Hundreds of calls can be monitored in real-time including detailed analysis of selected voice band streams.

RTP ToolBox™

GL's RTP ToolBox™ testing and simulation tool is designed not only to monitor RTP and RTCP packets, but also to allow users to manually create and terminate RTP sessions, independent of call-signaling protocols such as SIP, H323, MEGACO, or MGCP.

Near Real-time Voice-band Analyzer

The Near Real-time Voice-band Analyzer (VBA) is an analysis tool for monitoring voice band network traffic. The VBA can host different analysis modules for monitoring speech and noise levels, line echo, and acoustic echo. The standard modules included in the application are ITU-T P.56 Active Voice Level analysis, Line Echo (Hybrid) analysis, and Acoustic Echo analysis. Other analysis modules such as ITU-T P.561, P.562, and P.563 can be hosted as plug-ins.

Network Delay Measurements

GL’s Dual Universal Telephony Adapter (UTA) features a built in Round Trip Delay (RTD) and One-Way Delay (OWD) measurement capabilities. This can be performed while both network end points are collocated or geographically separated.

Echo Canceller Testing

GL Communications has the broadest range of testing solutions for echo cancellers, that provides accurate measurements of echo paths, impulse responses, delay, loss, echo return loss (ERL), and echo path delay (EPD). Tools are provided for thorough G.168 compliance testing including hybrid simulation, application of stimulus, capture of response, and graphical analysis of response.

Wireless/Wireline/VoIP Voce Quality Testing and Monitoring System

This system provides real-time voice quality measurement across a diverse set of networks. Voice calls are automatically placed between end points; quality is measured and provided for display at an NMS. Voice measurements include MOS (Mean Opinion Score), round trip delay (RTD), jitter, clipping, voice levels, etc. The essential elements of this system are Wireless / Wireline / VoIP Nodes to establish calls and send / receive voice files in real-time, and the Regional Command Center (RCC) to control the nodes. It also includes Remote Client NetViewer™ to remotely control the RCC, access, sort, and display all data collected by the RCC.

The GL Voice Recorder is used to manually capture the voice/data over a 2-wire Analog interface. Using the 2-wire Phone Tap adaptor, one can non-intrusively ‘tap’ into the analog 2-wire line via the RJ11 interface and capture the bi-directional voice/data. The recorded voice/data is automatically saved into a single PCM file.