This is what an early design of a Mobile Trunk Radio Communication system looks like..from the back! This version is analog and is used exclusively between Bhusawal - Itarsi, Itarsi - Nagpur and Nagpur - Durg. A driver can be called up anywhere on the section from the control office at the HQ on this!. Nagpur Station, 8th March 2005. By Alok Patel.