Digital signal lines that run between network elements are primarily carried over 75Ω coax cable. Two types of cables are commonly used. The standards for these cables are set by Bellcore (Bell Communications Research). Bellcore provides certain centralized research and standards coordination for the regional Bell operating companies. It also coordinates security and emergency preparedness for the U.S. government. The Bellcore standard GR-139-CORE defines type 734 and 735 cables for DS-3 applications. Within the industry, the terminology “thick and thin” is often used to describe 734/735 cable. Due to losses, there are differing distance limitations for each type of cable. 734 is a thick cable, about twice the size of a 735, and has a larger center conductor and insulator for lower losses for a given distance. The 734 can run up to 450 feet without requiring a “boost” or a repeater. On the other hand, the thinner 735 can only be used up to 200-250 feet without the need for a repeater. DS-3 interconnect cables must be made with true 75Ω coaxial cable and connectors. This is because cables or connectors which are 50Ω or which significantly deviate from 75Ω will result in signal reflections which will lower the performance of the connection, possibly to the point of not working. The BNC connector is the primary interconnect that terminates these cables within the network elements. Not only is a true 75Ω connector important, but also the crimping and cable stripping tools used to install it. Only a few manufacturers, Trompeter being one, make true 75Ω connectors known to work in this demanding application. Because of its high usage in the Telco space, this connecter is often called a “Telco BNC”.