Mr. Subandhu Dutta earned an A grade for successfully completing a two-month training course in Route Relay Interlocking from July to September 2012 in Kolkata, India. The course covered preparation of control tables, route relay circuits including line relay, unit control relay, axle counter, signal and other miscellaneous circuits. Mr. S. Majumdar, a retired Deputy Chief Signal and Telecommunication Engineer of Indian Railways, served as the trainer, and Mr. M L Dutta Chaudhury, Director of Radharani Rail Engineering systems authorized the certificate.