List the core companies of ECE in India

Here I am looking for the List the core companies of ECE in India, can you provide me the same???

As per your request here I am sharing the List the core companies of ECE in India:

Bharat Sanchar Nigam Ltd. New Delhi
Bharati Airtel Ltd., New Delhi
Reliance communications ltd., Mumbai
Hawlet Packard Bangalore
Videocon Industries Ltd., Aurangabad
HCL Infosystems Ltd, Noida
IBM India Pvt. Ltd., Bangalore
LG Electronics India Pvt. Ltd., Greater Noida
Siemens Ltd. Mumbai
Idea cellular Ltd Santacruz
Cisco systems India Pvt. Ltd Bangalore
Mahanagar Telephone Nigam Ltd., New Delhi
Samsung India Electronics Pvt. New Delhi
Intel Technology India Pvt. Bangalore
Bharat Electronics Ltd., Bangalore
Tech Mahindra Ltd., Pune
TATA communications Ltd., Mumbai
Dell India Pvt. Ltd., Bangalore
Lenovo India Bangalore
Sony India Ltd., New Delhi
Philips Electronics India Ltd., Mumbai
Moser Baer India Ltd., New Delhi
TATA Tele services Maharastra Mumbai
GTL Ltd., Mumbai
Acer India Pvt. Ltd., Bangalore
Sterlite Technologies Ltd., Pune
ITI Ltd., Bangalore
Bharti Teltecyh New Delhi
Mirc Electronics Ltd., Mumbai
Tulip Telecom Ltd., New Delhi
Aricent Technologies Ltd., Gurgaon
Mascon Global Ltd., Gurgaon
Samtel color Ltd., Ghaziabad
Paramount communications Ltd., New Delhi
Avya Global connect Ltd., Gurgaon
Sasken communication Bangalore
Northgate Technologies Ltd., Hyderabad
Subex Ltd., Bangalore
Canon India Pvt. Ltd., Gurgaon
Opto Circuits India Ltd., Bangalore
Supertron Electronics Ltd., Kolkata
Aftek Ltd., Mumbai
MIC Electronic Ltd., Hyderabad
JCT Electronics Ltd., New Delhi
D-Link India Ltd., Mumbai
Omtex Technologies India Ltd., New Delhi
Geodesic Ltd., Mumbai
Megasoft Ltd., Hyderabad