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Press Release: GL Enhances Voice Quality Testing Solution

Gaithersburg, Maryland, USA - June 21, 2010 - GL Communications Inc., announced today the release of its enhanced Voice Quality Testing Solution Ė that provides an excellent platform to measure voice quality over any type of network. Speaking to media, Mr. Robert Bichefsky, Senior Manager at GL, said, "Communication devices of all types are capable of voice - such as PCs with softphones, conventional landline phones, mobile VoIP phones, and mobile wireless phones. They can interconnect using 2G, 3G, and 4G wireless networks, landline TDM networks, and IP networks Ė all with varying impairments. As a result, end to end voice quality is more variable and more important than in the past with a homogeneous network".

He added, "GL's Voice Quality Testing Solution provides one test platform no matter the network (VoIP, TDM, or Wireless) and no matter the interface (Analog, Digital, or Wireless). It provides connections for all wireless phones, whether operating on GSM, CDMA, WiMax, or FemtoCell. Connection to a mobile device is possible via Bluetooth or a headset jack. VoIP connections are supported for ATAs, Media Gateways, or SoftPhones. Other supported interfaces include T1 E1, 2-Wire analog, and Push to Talk radios. This versatility is provided through a "universal telephony adapter", or Dual UTA (two ports of each type) and VQuad™ software capable of TDM, Wireless, and VoIP signaling and interfacing".

Mr. Bichefsky further added, "Once end to end connections are established, both Voice Quality and Call Failure Rates can be easily and automatically measured. Additional metrics include S/N levels, delay, jitter, and clipping".

He added, "Voice Quality utilizes three widely accepted algorithms to perform the voice comparisons, Perceptual Evaluation of Speech Quality (PESQ LQ/LQO/WB) per Rec. P.862.1/2, Perceptual Analysis / Measurement System (PAMS) per Rec. P.800, and Perceptual Speech Quality Measurement (PSQM) per Rec. P.861. PESQ provides an objective measurement of subjective listening tests on telephony systems".

Important Enhancements Introduced

  • VQT PESQ now supports Wideband PESQ (P.862.2) and the Impairment Factor (Ie) within results

  • VQT can automatically load and start Auto Configuration upon execution of the software.

  • The Command Center has added enhanced Email Alert support. This requires the DataImport application running on the central system. Both the VQuad™ and VQT can send alerts directly to the DataImport, which in turn will send the alert to the Command Center for processing. Email alerts also support Network Status of the individual network nodes. This modification provides easier setup and configuration of the entire network.

  • Support for VQuad™ and Central Location nodes when located behind a firewall or Router

  • Enhancement to the WebViewer™ includes ability to remotely control the various Network nodes (including VQuad™, VQT, Command Center, File Monitor) directly from the WebViewer™ browser screen

  • Enhancement to WebViewer™ includes ability to access the WebViewer™ configuration file and remotely make changes directly from the web browser. Changes include user-defined display of Pie Chart and Statistic screens

About GL Communications Inc

Founded in 1986, GL Communications Inc. is a leading supplier of test, monitoring, and analysis equipment for TDM, Wireless, IP and VoIP networks. Unlike conventional test equipment, GL's test platforms provide visualization, capture, storage, and convenient features like portability, remotability, and scripting.

GLís TDM Analysis & Emulation line of products includes T1, E1, T3, E3, OC-3, OC-12, STM-1, STM-4, analog four-wire, and analog two-wire interface cards, external portable pods, and complete system solutions. Capabilities include voiceband traffic analysis and emulation across all traffic types (voice, digits, tones, fax, modem), all protocols (ISDN, SS7, GR-303, Frame Relay, HDLC, V5.X, ATM, GSM, GPRS, LTE, etc.), and with capacities up to thousands of channels. Our newest products provide astonishing capacity and capture capability up to and including gigabit speeds.

GLís VoIP and IP products generate / analyze thousands of calls and traffic simultaneously with traffic types such as frames, packets, voice files, digits, video, tones, noise, and fax. Almost all codecs are supported including G.711, G.729, AMR, EVRC-A,B,C, GSM, iSAC, and many more. Additional features include visual analysis, real-time listening, and recording. The product line also includes Ethernet / IP Testing capability that simulates and checks frame transport and throughput parameters of Ethernet and IP networks, including delay, errors and other impairments.

GL's Voice Quality Testing (VQT) product line complements all of GL's products. Using ITU-standard algorithms (PAMS, PSQM, and PESQ), GL's VQT provides a widely accepted solution for assessing voice quality in the telecom industry. Voice Quality Testing across multiple networks (T1, E1, T3, E3, OC-3, OC-12, VoIP, Wireless, and Landline) are all available.

GLís Wireless Products perform protocol analysis and voice quality assessment on GSM, CDMA, UMTS, and LTE networks. Connections can be made to any wireless phone with automated call control, GPS mapping and real-time signal measurements.

GLís Echo Canceller testing solutions provide the broadest range of simulation and analysis, including line and acoustic echo. GLís compliance testing per G.168. G.167 and P.340 across TDM, IP, VoIP and Wireless networks is widely accepted in the industry.

GLís wireless VQT solutions help assessing impairments to voice quality such as poor mobile phone quality, voice compression and decompression algorithms, delay, loss and gain in speech levels, noise, acoustic and landline echo, and other distortions are easily assessed and accurately measured.

GLís Handheld data testers can test a wide variety of communications facilities and equipment including T1, fractional T1, E1, fractional E1, T3 and E3 modems, multiplexers, CSU, DSUs, T1 CSUs, DTUs, NTUs and TIUs and more. The testers provide convenience, economy, and portability for almost any interface, including RS232, RS-422, RS-530, X.21, T1, E1, T3, E3, and many others.

GLís Network Surveillance and Monitoring products include Probes for TDM, IP, VoIP, ATM, and Wireless networks. An open standards based approach provides a scalable, feature rich, real-time access to network characteristics. Centralized or distributed access, efficient transport and database loading allow compatibility with 3rd party and standards based monitoring systems.

For more information about GL's complete line of products,


Shelley Sharma
Phone: 301-670-4784 ext. 114

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