This DC Isolation Block, with a 1.6/5.6mm Male and Female Co-axial connector is used typically in-line in a 2 to 155 Mbits/sec transmission stream to prevent circulation of unwanted circulating DC currents between two pieces of transmission equipment that are connected together. Such a situation could be in backbone wiring, between different floors in a CO or telephone exchange. The DC block produces minimal loss, distortion and reflection in a transmission circuit. It is a ruggedly made unit, that provides reliable service. Enables continuous electromagnetic shielding along the co-axial cable. They are usually mounted in a special panel.