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Speaking to media men, Mr. Rob Bichefsky Senior Manager of Product Development said, “Today's telecommunication networks have become a combination of traditional PSTN network, new wireless networks, and emerging VoIP networks. In many cases, voice calls may originate in one network and terminate in another. In such circumstances, voice quality can easily become an important issue.” He added, “Efficient proactive monitoring can be a valuable diagnostic tool as well as a good indicator of combined network performance. More and more operators will choose a complete voice quality testing solution to verify the quality of their service, thereby providing better service for the end customer.”
Mr. Bichefsky further added, “GL's Intrusive Network Voice Quality Testing Solution consists of the following important components: VQT Algorithm, VQuad™ Node Sites, Regional Command Center (RCC), and Remote Client NetViewer (RCN). Its simplicity and ease of use make it ideal for hybrid networks encountered in today's telecom environment.”
GL’s Intrusive Network Voice Quality Solution consists of:
VQT Algorithm
This main algorithm residing at the RCC performs the VQT measurement on all "degraded voice files". It utilizes the ITU-T P.862.1 PESQ algorithm. Some features include; auto measurement, jitter, clipping, latency, noise and signal measurements. Other features include: a threshold rating system (excellent/good/fair/poor), sort/search capability on all results, and complete logging of results within an accessible database.
VQuad™ Node Sites
VQuad™ Node Sites make and receive calls under control of the RCN. Each VQuad™ node site can be equipped with interfaces fo: Wireless Units, i.e. Mobile Phones or Radios, Analog/Digital/VoIP Phone Handsets,FXO Analog Interfaces, i.e. 2-Wire PSTN,VoIP (SIP Call Control) Interface, T1 E1 (PRI ISDN/CAS) Interface. Each VQuad™ can perform automated call control for all interfaces through scripting, transmit / receive voice files (supports both 8 and 16 bit PCM), and perform round trip delay (RTD) measurements. Each VQuad™ also supports complete bi-directional testing.
Regional Command Center (RCC)
The RCC includes full control, automation, scripting, scheduling, and VQT Measurements for the entire region along with a Degraded Voice File Transfer Utility (automatically transfers the Degraded Voice files from the VQuad™ nodes to the RCC). The RCC controls all distributed sites, including such actions as: starting voice transmission and reception tasks for each site at user-defined times, monitoring each site's working status in real time, automatic gathering of received (degraded) voice files for each site, and calculating and archiving voice quality scores in real time.
Remote Client NetViewer (RCN)
The Remote Client NetViewer (RCN) can control many RCC's and view individual VQuad™node sites. The RCN can also remote control individual VQuad™ sites and control the VQT Measurement process. From the RCN, one can build and edit RCC and VQuad™ automation scripts, start and stop automation tests, and check overall status of the network.
About GL Communications, Inc.
Founded in 1986, GL Communications, Inc. (gl.com) is a leading supplier of test, monitoring, and analysis equipment for TDM, Wireless, and VoIP networks. Unlike conventional test equipment, GL's test platforms provide visualization, capture, storage, and convenient features like portability, remotability, and scripting.
GL’s TDM Analysis & Emulation line of products includes T1, E1, T3, OC-3, STM-1, analog four-wire, and analog two-wire interface cards and solutions. Capabilities include voiceband traffic analysis and emulation across all traffic types (voice, digits, tones, fax, modem), all protocols (HDLC, ISDN, SS7, CAS, GSM, GPRS, CDMA), and with capacities up to thousands of channels.
GL’s VoIP products generate / analyze thousands of calls simultaneously with traffic types such as voice files, digits, tones, noise, and fax using G.711, G.729, AMR, EVRC, and GSM codecs. Additional features include visual analysis, real-time listening, recording, and voice quality assessment using ITU algorithms PAMS, PSQM, and PESQ.
GL’s Wireless Products perform protocol analysis and voice quality assessment on GSM, CDMA, UMTS, and CDMA 2000 networks. Connections can be made to any wireless phone with automated call control, GPS, mapping software, and real-time signal measurements.
GL’s Echo Canceller testing solutions provide the broadest range of simulation and analysis, including compliance testing per G.168 and G.160.
GL’s Network Surveillance and Monitoring products include Probes for TDM, VoIP, ATM, and Wireless networks. An open standards based approach provides a scalable, feature rich, real-time access to network intelligence. Centralized or distributed access, efficient transport and database loading allow compatibility with 3rd party and standards based monitoring systems.
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