sentences:  C-DOT technology spread across the country through its licensed manufacturers..
  
  Beginning with digital switching systems, C-DOT developed products for optical, satellite and wireless communication from circuit switching technology, ATM and next generation networks.From a purely hardware development centre, it diversified into development of telecom software like IN, NMS, Data Clearing House and from a protected environment of closed market to an open and competitive market.While developing the RAX/MAX digital switches, C-DOT also evolved processes and procedures for manufacturing the switches in Indian factories which set up an Indian manufacturing vendor base.