This device is used for shielded and unshielded cables of up to eight cores. Specially suited for telecommunications and high-speed data and LANs including “Cat 5” 4-pair cables. It comes supplied with three cable sets pre-terminated for 4-pair RJ45 screened (STP) and unscreened (UTP), plus a 2-pair RJ11 set. The CDN allows configuration as an S1 - S8 (STP) and can replace AF1,2,4 & 8 and T1,2,4 and 8 (UTP) cores. Also supplied are the 46ZZ calibration adaptors with each CDN. The whole system is supplied with a ground plane complete with spring clips to grip the CDN and an appropriate earth lead.