The Measure Loop Delay/ERL application provides the capability to measure and display loop delay and echo return loss (ERL) on one or more timeslots.
Gaithersburg, Maryland (PRWEB) December 22, 2011
GL Communications Inc. a leader in providing PC-based test, analysis and simulation products and consulting services to the worldwide telecommunications industry, conveyed today the availability of its product Echo Path Delay/Loss Measurement software – for field measurement of Echo Return Loss & Loop Delay.
Speaking to media persons, Mr. Vijay Kulkarni CEO of the company said, ”The Measure Loop Delay/ERL application provides the capability to measure and display loop delay and echo return loss (ERL) on one or more timeslots. Multiple instances of this application may be opened simultaneously, allowing measurements to be taken on multiple timeslot ranges and measurement strategies.”
He added, “The application provides two basic modes of operation and are Intrusive and Non-intrusive. And in Non-Intrusive mode of operation, two GL boards are used, one of which monitors the original signal while the other monitors the returned or looped-back signal. The board monitoring the original signal operates in outward loopback mode, so that the signal is forwarded by the board hardware while being monitored by this application.
In Intrusive mode of operation, one or two GL boards are used. A signal is injected into one or more timeslots and the returned signal is monitored. The injected signal may be sourced either from a file containing A-Law or µ-Law encoded signal values, or may be a white noise (Gaussian) signal generated internally from within the application. The drop/insert feature of the GL boards may be used to pass through the traffic in channels not being tested by the application.”
Mr. Kulkarni further explained, “As provided in the block diagram, the application computes the delay by taking snapshots of the data stream on the receive and send paths. Snapshots are taken at approximately 2-second intervals, or as soon thereafter as permitted by the speed of the host machine. The send path snapshot is larger than the receive path snapshot by an amount corresponding to the maximum delay. It then computes the statistical correlation between the receive path and send path data streams at each successive point in the send path stream. The offset giving the highest correlation is taken as the delay in the returned signal. The return loss (ERL) is then calculated as the ratio of the average power in the corresponding segments of the receive path and send path streams.”
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.
GL’s 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.
GL’s 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) is available.
GL’s 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.
GL’s Echo Canceller testing solutions provide the broadest range of simulation and analysis, including line and acoustic echo. GL’s compliance testing per G.168. G.167 and P.340 across TDM, IP, VoIP and Wireless networks is widely accepted in the industry.
GL’s 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.
GL’s 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.
GL’s 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.
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