BT coaxial (British Telecom coax)
Designed to meet British Telecom standards, black PVC = internal/external, white PVC = internal only, LSZH = increased fire safety. BT2001, BT2002, BT2003, BT3002, BT5000.
CT coaxial (satellite-television coax)
Single core coax cables designed to transmit satellite, CCTV, television and video signals. black PVC = internal or external, white PVC = internal only, PE = duct grade, LSZH = increased fire safety.