Coupling/decoupling assembly for unshielded and shielded high-speed communication lines The HSC 4-8 from AMETEK CTS is the first coupling/decoupling network available on the market to couple Surge onto shielded and unshielded high-speed communication lines with data rates up to 1,000MBit/s. Additionally, the HSC 4-8 can be used as a coupling/decoupling network to apply Burst- as well as Ringwave pulses to unshielded symmetrical interconnection lines. The HSC 4-8 meets the requirements according Figure 11 and Figure 12 to the standards IEC 61000-4-5 (Ed. 3.0 :2014) and IEC 61000-4-12 (Ed. 3.0 :2017) Figure 10. Can also be used for damped oscillatory tests according IEC 61000-4-18.