The book provides an in-depth look into the technology and implementation of the Kavach system, an indigenous Automatic Train Protection (ATP) system for digital railways. The book covers various topics such as the system architecture, wayside and train on-board vital systems & SIL-4 communication system, which is the highest level of safety integrity according to international standards. The Kavach system is designed to ensure the safe and efficient operation of trains and also provides a high level of security to protect against unauthorized access and manipulation. The approved Kavach system is available from Indian manufacturers and has been successfully tested and implemented in South Central Railway. The book provides a detailed understanding of the technology, making it a valuable resource for those interested in the Indian railway industry. The book “Kavach: Cab Signalling and Automatic Train Protection System for Digital Railway” provides an in-depth and comprehensive look at the technology behind the Kavach system.Contents: 1. KAVACH - An Overview 2. RFID Technology 3. Communication System for KAVACH 4. Communication Techniques in KAVACH 5. Network Monitoring System (NMS) 6. Remote Interface Unit (RIU) used in KAVACH 7. Indigenous Manufacturer