Repair Depot

We specialize in repairing the most popular networking products in use today? We repair Cisco, Adtran, Nortel, Juniper, 3COM, Extreme and more. Our specially trained technicians repair your equipment right the first time. In-house professionally staffed component level repair operation offering immediate assistance. Please call 888-872-5619 and ask for the repair department.

Alliance Datacom

Your trusted, global resource for new or used Cisco equipment, parts and accessories. We carry the award winning line of Cisco routers and Cisco switches below list and shipping daily with an industry leading 1-year warranty. Alliance Datacom is a trusted advisor to corporate end-users providing fast delivery of new, used, refurbished, as well as remanufactured WAN (data communication) network equipment products worldwide. We have our own, in-house professionally staffed component level repair operation offering repair on most WAN products. As a wide area networking solution provider to corporate end-users, we offer one of the world's largest product selections of Cisco, Adtran, Nortel, Juniper and Extreme Networks all at discounted prices. Same day shipping on most items, fast delivery and friendly customer service...guaranteed! Experience the Alliance Datacom difference today.

Adtran HDSLx/T1

ADTRAN is the market share leader in HDSLx technology and has long been a provider of basic T1 components.

HDSLx technology includes HDSL, HDSL2, and HDSL4 with each technology developed to meet specific, carrier needs. ADTRAN has been a leader in standards development for HDSL2 and HDSL4 technologies by closely working with standards committees.

HDSL (2B1Q modulation technology) has largely replaced early T1 technologies that had limited distance and were difficult to provision. Today, HDSL is the second most widely deployed xDSL technology following #1, BRI ISDN. HDSL2 uses a better modulation technique (TCPAM) that requires only two wires (one pair) and allows repeaters. HDSL2 can handle long copper loops afflicted with bridge taps, other DSL services, and possible crosstalk conditions. HDSL4 (TCPAM) using four wires (two pairs), was needed to extend carrier reach beyond the Carrier Serving Area (CSA) and have spectral compatibility with ADSL.

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