Modular High-Density Racking System (HDRS) for network cross-connect. HDRS is a well-engineered cross connect and hosting platform that offers you a high level of versatility and flexibility in systems design for ultimate network density and management. These high-reliability products have been designed specifically for networking environments, from telecom closets to world-class data centers, to help you make the best use of valuable real estate and simplify MACs (moves, adds and changes).