GL Conveys its Expertise in Advanced Tunnel Radio Communications Systems

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GL Communications Inc conveyed today its expertise in Advanced Tunnel Radio Communications Systems for Mass Transit Systems.

Advanced Tunnel Radio Communications Systems

GL provides system design and technical specifications for radio communications of aboveground, garage repeaters and underground systems inside tunnels for transit networks.

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 Advanced Tunnel Radio Communications Systems for Mass Transit Systems.

Speaking to the press, Mr. Vijay Kulkarni, CEO of the company said, “It is essential for Mass Transit Systems to maintain vital radio communications links within subway tunnels, stations and pubic access areas. Modern technologies enable extending the aboveground mobile radio coverage to the underground seamlessly and cost-effectively. Regardless of whether the communications system is above ground or below ground, many of the requirements remain the same: Tunnel radio communications for first responders as well as system maintenance and operation personnel, Inter-agency communication and interoperability in tunnels via centralized intelligent command and control center, growing homeland security concerns and need to access voice and data quickly in tunnels, emergency alerts and public safety concerns in tunnels during emergencies, automatic vehicle location and advanced mobile data terminals within tunnels and next train arrivals information over the radio links.

To meet the above requirements tunnel radio systems can encompass many system technologies - selecting the right one is sometimes not an easy task. And some of the requirements of tunnel radio systems are: Continuous coverage over the entire length of the tunnel i.e. no dead spots, clear audio throughout with little or no interference, reliable system operation under harsh tunnel environmental conditions, trunked radio channels across many bands, ease of system operation and maintenance.”

He added, “GL Communications provides system design and technical specifications for Metro Subways to extend system-wide UHF radio communications inside the tunnel and underground stations. We also provide construction management that include inspection and quality assurance services of the newly installed redundant off-air radio system interfaces, fiber-fed bi-directional amplifiers and RF distribution infrastructure inside the tunnels and underground station platforms.

GL's engineers using RF measurement systems analyze the signal strength within tunnels and identify locations of poor RF coverage. Our analysis and engineering support helped many customers implement remedial actions to improve the RF coverage within the metro tunnels.”

Mr. Kulkarni further added, “GL provides system design and technical specifications for radio communications of aboveground, garage repeaters and underground systems inside tunnels for transit networks. Our services include surveys, studies, description, definition and documentation of existing and proposed systems.”

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).

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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