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• Business: Electronics and Electrical: Test and Measurement  (407)
• Computers: Data Communications: Testing and Tools  (67)

• A8619 Protocol Test System - The A8619 Protocol Test System offers Analysis, Simulation, Emulation of SS7, V5, ISDN, INAP, GSM, GPRS, CDMA and VoIP protocols.
• Acterna - Manufactures wide range of instrumentation and systems for communications equipment development and maintenance. Areas of application include optical transport, data communications, cable and wireless.
• Aegis - OSP cable fault location test equipment.
• AGM Elettronica - Manufactures fault location and measurment equipment for wire and cable manufacturers.
• Allied Analogic - Manufacturer of the modem line tap used by POS, ATM and the telecommunications industry to troubleshoot analog data communications on telephone lines.
• Ameritec - Communications test equipment solutions, bulk call generators, switch/network, simulation, signaling analyzers, transmission impairment measuring sets (TIMS), bit error rate testers, wireless cellular/PCS quality of service.
• Applied Signal Technology, Inc. - Design, develop, manufacture and market signal reconnaissance equipment to collect and process telecommunications signals.
• Arca Technologies - Arca Technologies provide a complete range of VoIP, ISDN, VoDSL, xDSL, V5.1, V5.2 and PSTN test and simulation equipment
• Asentria Corporation - Remote monitoring system, tools and network management software from Asentria. (formerly Omnitronix)
• The Board Room Inc. - Supplier of revenue assurance and switch testing equipment and systems.
• Boonton Electronics - Manufacturer of RF power, microwave, audio, modulation and impedance test instrumentation and sensors.
• Brighton Electronics, Inc. - Supplies digital and analog panel meters, temperature and process controllers, and hand-held test and measurement equipment.
• Catapult Communications Corporation - Develops, manufactures, markets and supports an advanced software-based test system offering an integrated suite of testing applications for the global telecommunications industry. (Nasdaq: CATT).
• C.E. Cox - Manufacturer of cable fault locating and testing equipment for industrial and telecommunications applications
• Circadiant Systems - Manufactures optical test equipment.
• Consultronics - Manufacturer of telecommunications test equipment including xDSL cable qualifiers, test sets for ISDN, T3/T1, E1 and TDR.
• Ctc Union Technologies Co.,Ltd. - Supplier of protocol and transmission analyzers, interface converters, Tl/El DSU/CSU digital access units, SDSL, BOB and IAN cable testers and related communication products.
• Delsat Group - Delsat is an Argentinian company which manufactures metering and monitoring equipment for telecommunications.
• denk-stein:net - Supplies measurement and test equipment for telecommunications networks.
• Electrodata Inc. - Manufacturer of hand-held telecommunications test equipment specializing in T1, DS3, and STS-1 Sonet testing. Includes ISDN, SS7, GR303, frame relay.
• Electronic Communications Inc. - Cable television electronic and equipment repair service. Repair for converter boxes, rf line gear, and headend equipment.
• EML European Market Liaison - Supplier of telecommunication test equipment for the local loop including Records Purification (RPS).
• Endace - Endace manufactures network monitoring interface products that can test and analyze telecommunications and network equipment.
• Frame Communications Ltd - Designs, develops and manufactures test and management solutions for a wide range of protocols and system types as well as for network surveillance of billing verification and revenue assurance.
• Frederick Engineering - Network test equipment manufacturer. Develops WAN/LAN network test equipment, telecom BER testers and protocol analyzers for all telecom protocols and circuits.
• GAJ Technology - Simulators for providing proof of compliance for telecommunication equipment and for testing modems, DSLAMs, network cards or any device that uses CAT 5/5e cable.
• GL Communications Inc. - Single and dual laptop analyzers provide T1 and E1 testing.
• GN Great Nordic - Develops telecommunication network performance monitoring and hands-free communicationis solutions. (Copenhagen Stock Exchange: ISIN code DK001027263-2).
• GSI Labs - Sells network monitoring equipment to telecommunications companies. Includes software screenshots, product details, and FAQ.
• GUISYS Corporation - Manufacturer of low cost PDA/PC driven POTS, TIMS, DS1, DS3, and ISDN hand-held test equipment.
• Hermon Labs - Provides fully automated compliance, pre-compliance, development and production testing solution for analog PSTN, acoustic, xDSL, VoIP, T1, E1 and ISDN PRI interfaces.
• IBEX Systems - Communications manufacturers representative and reseller firm offering radio, wire voice, data and video telecommunications networking and test equipment.
• Inala Technologies (Pty) Ltd. - Test and measurement equipment, monitoring systems and customised solutions for GSM networks in sub-Saharan Africa.
• Independent Technologies, Inc. - Design, manufacture and market a wide range of customized communications products.
• IneoQuest - Network performance testing, protocol, debug analysis tools.
• Innocor - Designs and manufactures industry test equipment for broadband and legacy telecom applications.
• Ixia - Provides test tools, development and testing services for call centers, communication networks, and network devices.
• JFW Industries - Designs and manufactures RF components including attenuators, RF switches and specialized test systems for telecommunications, OEM test equipment, medical, automotive, and defense markets.
• JTC Sales, Inc. - Utility equipment supplier for reel and wind up trailers,Fiber figure 8er and mud duck mudsucker
• KSI Corporation - Manufactures timing boards for use in telecommunications, government and test and measurement applications.
• KTL Worldwide - Independent organization for the testing and certification of telecom, IT, wireless and electrical products. Laboratories and accreditations worldwide.
• The Larry McGee Company - Manufactures industrial grade communication and control equipment.
• Lemco Tool Corporation - Manufacturer of tools for construction and maintenance of fiber optic and coaxial cable systems. Features detailed product drawings and tool tips.
• Linkbit - Anytest product, E1/T1 portable tester, PRI analyzer and other testing units.
• LP Technologies - Providing engineering, marketing and sales of RF products, primarily in the electronic and software product market place.
• MarQuest Limited - Provides equipment and services for analysis and testing in digital telephony (PCM) transmission and signalling systems.
• Megatel Industries Corp. - Provider of digital data communication and telecommunication equipment.
• Metro Tel Corp. - Manufacturer of telecommunications test equipment. Products include subscriber loop, Linemans test sets and cable pipe location equipment.
• MI Technologies - A leading supplier of microwave instrumentation for testing antennas, radomes, radar cross section analysis, components, EMI/EMC and automotive applications.
• Microtronix Systems - Specializing in the production of telephone testing equipment.
• Mike Sandman - Supply hard to find problem solving tools, test equipment, telephone repair parts and training videos.
• Molher Electronica - Designs and develops measuring instruments for copper pair and fiber optic and offers automation solutions for xDSL interoperability testing. [May not work properly in all browsers]
• MSS Power Systems - Providers of application tools to the telecommunications and power contractors.
• NetHawk Oyj - Provides mobile network equipment vendors and operators with instruments, systems and related services for accelerating development and improving quality.
• Net-O2 Technologies - Provider of communications software, network testing and network security software solutions and services from India.
• Noise Com - Manufactures devices, test instruments and systems for evaluating noise susceptibility of wire-based and wireless communications components and networks
• NS Electronics Service, Inc. - Sales and service of communications service monitors and equipment.
• NTI - Manufacturer of test instruments for the professional audio industry, the broadcast market and the loudspeaker industry.
• Nutmeg Utility - Development and distribution of tools, products and services to the telephone, construction and utility industries.
• OEL - Supplier of telephone installation tools.
• Omnicor - Supplier of IP traffic generators for gigabit ethernet switch, router and network performance testing.
• ORBIT/FR, Inc. - Develops, markets and supports automated microwave test and measurement systems.
• PDS Test - Company provide a wide range of communications test, development, demonstration and connectivity solutions.
• PriLink - Telecommunications management tools with specific emphasis on North American ISDN-PRI services.
• Radcom - Provider of analysis and monitoring solutions for VoIP, 3G Cellular and Datacom
• RAN Systems Home Page - Provides call test monitor and master clocks to the 911 Emergency community. Includes product details and industry news events list.
• Rochelle Communications - Global supplier of Caller ID and telephone test equipment.
• Rohde & Schwarz - Manufacturer of spectrum analyzers for measurements in the frequency-domain, time-domain and modulation-domain (vector signal analysis).
• RTI Products - Manufacturer of electronic snow sensing and anti-icing systems for the telecommunications industry.
• Sadelco R&D - Research, development, and manufacturer of communications test equipment used in the testing of cable television, broadband, and computer systems.
• Sage Instruments - Portable and hand held telephony test equipment.
• San Mateo Electronic Supply - Distributors of Computer, networking cables and accessories. Test equipment for telco, network systems.
• Schultz Communications, Inc - Supply a range of telecommunications equipment and tools . Products include test and measurement instruments, wire and cable and speciality tools.
• Shenick Network Systems Limited - Offers information about test suites for network infrastucture.
• SHF Communication Technologies AG - Manufacturer and supplier of bit error rate test systems, broadband amplifiers, digital modules and passive microwave components and related equipment.
• Skyline Communications - Supplier of software monitoring and control solutions for the HFC broadband, satellite, broadcast and telecom industry.
• Sofimation - Multipath Fading Simulator for GSM850, GPRS, 3G, CDMA2000
• Solinet - High technology company focusing on turn-key solutions for the implementation and validation of signalling systems.
• Spirent Communications: Test and Service Management Solutions - Spirent Communications provides test and service management solutions for the communications industry.
• Summitek Instruments - Offering Summitek intermodulation and BaseStAR interference analyzers and colocation equipment.
• Sunrise Telecom Inc. - Develops and manufactures telecommunications test and measurement solutions.
• System Studies, Inc. - On-line resource for cable pressurization information and technology.
• Telebyte Inc - Local Loop Simulators and Noise Generators for ADSL, ADSL2, ADSL2++, G.SHDSL, VDSL Testing.
• Telemark Solutions - Supplier of innovative buried electronic markers used to mark cables, to provide easy cable locating.
• Telephone Tools of Georgia - A manufacturer and distributor of unique and hard to find telecommunicaions tools from the turn of the century through today.
• Telephony Software Associates, Inc. - Serial alarm monitoring of telecommunications equipment: protocol specifications, test procedures, software tools that facilitate installation and troubleshooting.
• Telinc - Designs, develops and markets (WAN) Wide Area Network access products and communications test equipment.
• Telsoft Inc. - Provider of telephone line-powered dialers and other telecommunications testing equipment.
• TesCom - Providing repair, calibration, refurbishment and sales of telecommunication test equipment.
• testworx - Test equipment from several manufacturers for data communications and telecommunications networks. Applications include DSL, T-carrier, fiber optics, signalling and IP networks.
• Ticknall Communications - Suppliers of telephone and data communications test and monitoring equipment
• Topline System Co., Ltd. - Manufacturer of RF shielded rooms, EMC chambers, EM shielded and test chambers and enclosures.
• TraceSpan - Industry's first non-intrusive analyzer for vendor-independent testing of ADSL and ADSL2 networks.
• Tracewell Systems, Inc. - Manufactures and integrates systems using VME, VME64x, VXI, CompactPCI and PXI for the telecommunications, military test and measurement and medical industries.
• Tucana Telecom - Protocol test and measurement equipment, monitoring, simulating, load generators and emulator equipment for communication interfaces.
• TX Technology Corp. - Designs and manufactures intelligent monitoring and control systems, remote and addressable sensors, computer controlled air dryer systems, and pressure and flow transducers.
• ValueTesters - Supplier of datacom, telcom, air conditioning and power quality test equipment.
• WAVETEL - Designs, develops and sells ISDN, SS7, V5 and PSTN protocol and traffic analysers for transmissions systems.

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