These handy SuperLooper plugs are great for working with and testing T1/E1 (DS1) cables. The loopback SuperLooper rapidly tests the TX/RX pairs of T1/E1 circuits by creating a feedback loop: if the circuit LED lights, then the cable is okay.
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We cannot do everything, but we usually can accommodate a certain changes in product options such as color, size, material, or minor design twist. We primarily work with vendors or factories, not individual artist or craftsman. For custom made products, we usually only cater to bulk size order that meets the minimum quantity requirement of a single factory run. Don't be shy. Ask. What we can accomplish may surprise you!