GL Conveys Its Expertise in Testing High Speed Telecom Lines Prior to Turn Up

Gaithersburg, MD (PRWEB) August 11, 2012

GL Communications Inc. a leader in providing PC-based test, analysis and simulation products and consulting services to the worldwide telecommunications industry, conveyed today its expertise in Testing and Verification of High Speed Telecom Lines before they start carrying commercial live traffic.

Speaking to the press, Mr. Vijay Kulkarni, CEO of the company said, These days telecom networks support a number of applications, including voice, data, and video. The underlying technology may be different – such as TDM, ATM, IP, even Wireless. The physical network can be copper, radio/microwave, optical fiber, or satellite. Service providers must thoroughly evaluate their networks to ensure that their availability meets customer expectations. Such an evaluation would often include testing the networks under normal operating conditions as well as testing beyond normal operational environment, often to a breaking point or close to it, called stress testing. Most operators would prefer to stress test their networks and observe their performance to have a level of confidence before putting through commercial traffic.

He added, GL has expertise to test a domestic long distance carrier lines prior to turn up. We develop a test plan covering throughput testing, continuity testing, and stress testing. Our engineers programme test equipment to generate traffic with varying packet sizes and inter-packet gaps. Sending smaller packets with minimal gaps stresses network elements that switch packets and also tests any latency issues. Longer packets, scrambling, and octet stuffing and de-stuffing were also tested. An ideal way to generate the maximum stress on circuits under test is to transmit an IP packet, which has both a random packet size and gap. Internet traffic may, typically, transmit any of the definable packet sizes and gaps. However, in practice, it is more common to see fewer variations in the packet size as more packets are transmitted. GL’s test plans provide a packet stream that closely approximate real life traffic distribution as well as extreme ranges.

Mr. Kulkarni further added, Designing and conducting stress tests are specialty areas that are best handled by experts. Our engineers have extensive experience to perform the entire gamut of testing including – design test plans, write test procedures, conduct tests, and document test results. With extensive experience in telecom testing, GL offers a comprehensive suite of testing services to evaluate complex telecom networks. These services are intended to insure that the performance and reliability of networks are completely understood prior to decisions to start carrying live traffic.

About GL Communications Inc.,

Founded in 1986, GL Communications Inc. Provides technical consulting, engineering and testing services in wireless, telecom, and IT disciplines. Our customers include telecom wireless and landline carriers, mass transit and public safety systems nationwide. We have designed hundreds of wired and wireless telecom network systems over the past 23 years.

GL is a DBE/MBE firm certified by Maryland’s Department of Transportation (MDOT), Washington Metropolitan Area Transit Authority (WMATA), Virginia Department of Transportation (VDOT), and South Eastern Pennsylvania Transportation Authority (SEPTA).

GLs 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.

GLs 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.

GLs 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.

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

GLs 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.

GLs 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.

GLs 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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GL Conveys Its Expertise in Testing High Speed Telecom Lines Prior to Turn Up

GL Announces Monitoring Clock or Frame Slips on T1 or E1 Lines

Gaithersburg, Maryland (PRWEB) September 12, 2012

GL Communications Inc. announced today the release of its latest T1 E1 Hardware product feature Clock Slip Measurement which monitors Clock and Frame Slips on T1 E1 Lines.

Speaking to reporters, Mr. Jagdish Vadalia Senior Manager of the company said, In a network, all switches use a single timing signal to transmit all signals in the outbound direction. This single timing is always derived directly from a single common reference timing signal available network wide. However, incoming signals may have timing variations due to propagation variations, re-clocking jitter, wander, frequency drift, etc. Due to this timing difference between transmit vs. receive signals; the network equipment may suffer an impairment by replicating data or deleting data. This is referred to as a Timing, Clock, Bit, or Frame Slip.

He added, Clock Slips are a count of the difference between a reference T1 E1 clock and another T1 E1 signal being measured. A Clock Slip is a one-second-interval measurement (accuracy of the timing slips is +/- 1 count) that arise because of phase differences or frequency differences of the incoming signal vs. the outgoing signal timing (the reference). Enough clock slips (usually counts reaching 192 or 193) create a frame slip, and eventually, loses or repeats data.

Mr. Vadalia explained, GLs T1 E1 Analyzer can measure Clock Slips between two T1 E1 timing signals. Different modes of Clock Slip that can be measured by T1 E1 hardware are:

Internal Clock Slip Reference:This Clock Slip measurement compares the incoming receive clock from the port against the internal clock provided by the unit. The software compares the internal counter to the recovered clock counter by storing these counts.

Crossport Clock Slip Reference: This Clock Slip measurement compares the incoming receive clock from Port #1 against the incoming receive clock from Port #2 using the Recovered Clock on Port #1 and Recovered Clock on Port #2.

External Clock Slip Reference:

GL Announces Monitoring Clock or Frame Slips on T1 or E1 Lines

GL Announces Single and Bulk Fax Simulation Over T1 E1 FXO FXS Lines

Gaithersburg, Maryland, (PRWEB) November 15, 2012

GL Communications Inc. announced today the release of its latest Single & Bulk Fax Simulation Over T1 E1 FXO FXS Lines.

Speaking to reporters, Mr. Jagdish Vadalia, Senior Manager for Product Development of the company said, Ordinary telephone lines can be used for voice, data (modem), and for fax. Believe it or not fax is still very popular. No business can be without a fax machine and some businesses, like banks, rely heavily on fax transmission for transactions involving money because faxes are considered legal documents.

He added, GL has recently introduced Single and Bulk Call Fax Simulator. This software is capable of transmitting and receiving over many T1 E1 timeslots or through two-wire FXO and FXS lines. The software can emulate many virtual fax machines – Transmitter as well as Receiver. All variations are supported. Fax Simulator can be used with any GL Protocol Emulation tools such as MAPS CAS Simulator, MAPS ISDN Simulator, and MAPS SS7 Simulator to simulate complete real time Fax calls.

Mr. Vadalia added, Using GL’s versatile hardware product line, various fax testing scenarios can be simulated: Bulk Fax tesing over many T1 E1 lines (100′s of timeslots) with our Octal T1 E1 Cards, or single FXO and FXS lines on our versatile tProbe platform, or hundreds of FXO FXS lines with our High Capacity Analog 2-Wire platform.

Fax Emulation Applications

Typical applications of our Fax Emulation software are load testing of fax servers, qualification testing of T.38 Gateways, testing of ATAs (Analog Terminal Adapters), testing of fax machines, and many more. Features and applications are:

Load Testing sending or receiving up to hundreds of faxes simultaneously; one end can send and receive simultaneously on different timeslots; over many T1 E1 lines; over many FXO or FXS lines; any signaling protocol can be used such as PRI ISDN, SS7, or CAS
V.34 Testing there are many fax modulations and V.34 is the fastest, permitting many pages to be transmitted quickly
High Speed / Low Speed fax protocol consists of low speed handshaking and high speed image transmission
Multiple Pages single or multiple page fax transmission is supported
With or without ECM Error Correction Mode permits the retransmission of erred pages.
Alaw and

GL Announces Single and Bulk Fax Simulation Over T1 E1 FXO FXS Lines