Tummala Electronics Pvt. Ltd. Offers Auto Exchange Interface for Accident Site Communication. Tummala Electronics Pvt. Ltd. Manufactures Railway Communication Equipment, Solar Water Heaters and Solar Powered Lighting Systems. The Auto Exchange Interface for Accident Site Communication is connected to a divisional office Dual-tone multi-frequency [DTMF] exchange and allotted a distinctive subscriber number [say 8888]. The existing 4 Wire Trans and Receive lines can also be connected to this equipment so that a remote location in a 4 wire area can access the exchange located in the divisional office.
