Kalindee started the telecommunications with simple line wire communications for Railways Safety Block and operation control circuits. Kalindee continued to diversify in new areas of telecommunication technology to suit developments in Railways. With introduction of railway Electrification Kalindee took up main line underground amoured and screened cable suitable for long distance circuits on 25KV AC electric traction. Further diversified in Optic fiber and Radio wireless systems including wide area and local area networking, GSM systems and Mobile Train Radio. Kalindee executed the longest optic fiber system 1000 kms long on Konkan Railway. Kalindee executed telecommunication works not only for the Indian Railways but also for other major Private Telecom Service providers in creating their networks. The varied experience of Kalindee included the following (figures in brackets indicate the work done in respective fields):