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GL Announces Enhancements to HDLC Testing Tools
[February 08, 2013]

GL Announces Enhancements to HDLC Testing Tools

(PR Web Via Acquire Media NewsEdge) Gaithersburg, Maryland (PRWEB) February 08, 2013 GL Communications Inc. announced today the release of its enhanced HDLC Link Impairment Utility (HLIU) application and other HDLC Testing Tools.

Speaking to reporters, Mr. Vijay Kulkarni CEO of the company said, “HDLC is a Layer 2 “backbone” protocol for reliable transport of data, voice, and video. It is used to encapsulate almost all other higher layer protocols such as ISDN, PPP, and Frame Relay. It is also used to encapsulate Ethernet frames over WAN links.” He added, “HDLC Impairment Utility impairs HDLC frames on T1 E1 lines, whether they occur on single timeslots at 64/56 kbps rate or as hyperchannels wherein contiguous timeslots are used to create N x (64/56 kbps) channels, with N possibly equal to the max timeslots of 31/30/24. The application can use any of GL’s T1 E1 platforms including T1 E1 Universal Cards, tProbes™, USB T1 E1 Analyzers, and Octal T1 E1 Cards.” Mr. Kulkarni further added, “The application is useful in simulating real network conditions and the impact thereof on protocols such as ISDN, SS7, and other HDLC based protocols. It is also useful in verifying proper operation of HDLC hardware/software implementations.” He added, “Impairments that can be introduced are: Logic Errors, CRC Errors, Drop a Frame, Change Order of Frames, Duplicate a Frame, Insert a Frame, and Delay a Frame. These impairments can be introduced manually or automatically with a specified random rate, e.g. 1x10E-04, or one in 10,000.” Other HDLC Test and Analysis Tools HDLC Emulation and Analysis is supported in a variety of GL's products: T1 E1, T3 E3, OC3/12, STM1/4 and Datacom Analyzer/Emulator. Applications are provided for analyzing HDLC based protocols, testing HDLC implementations (software and chip), and testing very high throughput HDLC channels such as N x T1 E1.

Here are some applications that are available: HDLC Analysis, Playback, Test Tx, and Test Rx, File Based HDLC Record / Playback, MultiChannel HDLC Emulation/Analysis and High Throughput File Based HDLC Record/Playback 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.

Read the full story at http://www.prweb.com/releases/glcommunicationsinc/hdlc-link-impairment/prweb10407020.htm (c) 2013 PRWEB.COM Newswire

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