GL Announces Support for DS3 Subrate and Scrambling

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GL Communications Inc. announced today the release of its enhanced T3 (DS3) E3 Analyzer with DS3 Subrate and Scrambling feature

DS3 (T3) E3 Analyzer

The analyzer allows to choose scrambling in each DSU mode. Scrambling was implemented to address various 0s-density when used in WAN interface. User can monitor such communications using GL's USB T3 E3 Analyzer.

GL Communications Inc. announced today the release of its enhanced T3 (DS3) E3 Analyzer with DS3 Subrate and Scrambling feature.

Speaking to reporters, Mr. Vijay Kulkarni CEO of the company said, “GL's T3 (DS3) E3 Analyzer Pod is one of the smallest and lightest (weighing only 1.75 lbs) analyzer units in the world. The pod when connected to Notebook PC is capable of capturing two full T3 (DS3) / E3 data streams, dropping and inserting T1 or E1, and Analysis of HDLC, ATM, Frame Relay, and PPP Protocols.”

He added, “GL's T3 (DS3) E3 Analyzer is now enhanced with scrambling and subrate features. Sub rate allows DSU manufacturers to control bandwidth from service provider end and sell user specific bandwidth. Data Service Unit (DSU) Subrate feature in T3 (DS3) E3 Analyzer allows to configure the DS3 networks for the following DSU vendors' algorithms for T3 interface: Digital Link, Larscom, Verilink, and Adtran.”

Mr.Kulkarni further added, “The analyzer allows to choose scrambling in each DSU mode. Scrambling was implemented to address various 0s-density when used in WAN interface. User can monitor such communications using GL's USB T3 E3 Analyzer.”

The enclosed diagram illustrates subrate and scrambling implementation over DS3 lines.

Data Descrambler

·After the data is descrambled, the data descrambler block is used to descramble incoming data using a configured polynomial.
·The scrambler can be turned off for data not using descrambling.
·This block uses a normal descrambling serial polynomial which can be configured for multiple polynomials

Data Filter

·The Data filter uses a multi-framed aligned block RAM which is used to enable or disable the incoming data.
·By enabling or disabling the incoming data, software can configure the incoming data to support the different DS3 DSU vendor subrates

Filter Descrambler

·Some Vendors only support scrambled data of the subrate. The unused payload is left unscrambled.
·This block descrambles the data using a similar polynomial descrambler as the first descrambler block but only on the incoming filtered bandwidth data.

Other Features of T3 (DS3) E3 Analyzer:

·One of the smallest and lightest T3 (DS3) /E3 analysis platforms with dual data stream capture capability.
·Multiple interfaces for analysis (T3 (DS3) /E3, T1/E1 and Ethernet) and control (USB and Ethernet) to support a wide array of testing scenarios
·Plug and play through USB 2.0 control interface.
·Software selectable T3 (DS3) / E3 interface along with T1 (DS1) and E1 Drop and Insert.
·Dual T3/E3 Receivers and Transmitters for non-intrusive and intrusive testing of both eastbound and westbound signals at the same time.

·General T3 (DS3) /E3 signal testing capabilities
·Channelized (Structured) Testing
·Unchannelized (Unstructured) Testing

·Simultaneously record / playback the entire T3 (DS3) /E3 in framed or unframed modes up to hard disk capacity.
·Flexible clocking - internal, recovered (from T3 (DS3) /E3, T1 (DS1) or E1) and external.
·Scripting and Automation through GL’s well-known Windows Client Server (WCS) approach.
·Monitor / Manage the Analyzer remotely via Ethernet port (future enhancement).

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.

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