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Press Release: Delay Emulation for Packet
over SONET and ATM

Gaithersburg, Maryland, USA - February 28, 2013- GL Communications Inc. announced today the release of its new Packet Delay Network Emulator application for its LightSpeed1000™ product.

Speaking to reporters, Mr. Jagdish Vadalia Senior Manager for product development of the company said, "Voice, data, and video traffic is exploding as smartphones, IP TV, video streaming, and "cloud" based services takeoff. A majority of the backbone transport for these applications continues to be SONET and SDH optical transmission. A dominant protocol for IP transport is PoS (Packet over SONET) and another is ATM (Asynchronous Transfer Mode). Both schemes are packet based, with ATM using fixed size packets of 53 bytes called "cells", and PoS using variable packet sizes closely matching to Ethernet frames.

Both technologies can and often do coexist in a network. ATM switches often aggregate cell traffic in the access area (from DSL lines) and PoS is used more frequently in the core network for high speed transport, due to better efficiency. Core Routers, DSLAMs, Edge Routers, and User applications over such hybrid networks will benefit from lab testing and verification before deployment."

He added, "GL's LightSpeed1000™ hardware platform (PCIe Card) is capable of OC-3/12 and STM-1/4 Wire-Speed Processing on Dual Optical Ports for such functions as wire-speed recording and wire-speed playback. Normally, the LightSpeed1000™ is used for protocol analysis of ATM, PoS, Raw unchannelized and unframed data, and Ethernet traffic at IP, UDP, and higher layers. The hardware can be easily configured / programmed for delaying of ATM cells or PPP packets."

Mr. Vadalia further added, "Packet Delay Network Emulator feature combines hardware and software based functions to achieve precision and flexibility. Delays are programmable from 1 ms to 500 ms with incremental delays of 1 ms. SONET/SDH overhead, scrambling, HDLC processing are terminated on the receive side and regenerated on the transmit side.

PPP frames are removed from the payload, time stamped and store and forwarded based on user delay settings. ATM cells are similarly store and forwarded. Flags and idle cells are inserted as appropriate in the output stream. The Packet Delay Network Emulator is transparent to higher layer protocols above ATM and PoS. A simple GUI allows user modification of delay and port settings."

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) are all 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.

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

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


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