| United_Networks UK voice carrier offering TDM & IP based communications from their own facilities. |
| Videotron_Telecom Internet, data, and telephony services provider in Canada. [English/French] |
| Vtesse_Networks Provides optical networking and related data services in the UK. |
| XO_Communications Providing services to businesses worldwide over its networks. |
| Sector_Updates Sector-based investment news and commentary on biotechnology and pharmaceutical, energy, technology. |
| 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 |
| 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 |
| 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_ Hardy protocol, transmission analyzer, interface converters, Tl/El DSU/CSU digital access unit SDSL series, BOB and IAN cable tester, communication products series. |
| 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, developes 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. |
| Genesys_IBS_Ltd Designs and develops telecommunications test solutions, specialising in automated PSTN & xDSL test systems. |
| GL_Communications_Inc_ Single and dual laptop analyzers provide comprehensive and versatile 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. |
