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Member, National Academy of Engineering.
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Fellow, National Inventors of Inventors.
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Ambassador-at-large for Bell Labs.
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2005 IEEE Eric E. Sumner Award.
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2005 IEEE W. Wallace McDowell Award.
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The 2005, 2009 and 2010 Thomas Alva Edison Patent Awards from the R&D Council of New Jersey.
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Inducted into the NJ Inventors of Fame in 2014.
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Bell Labs Fellow, Fellow of the Institute of Electrical and Electronics Engineers (IEEE) and Fellow of the Association of Computing Machinery (ACM).
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2005 Distinguished Alumni Award from Indian Institute of Technology, New Delhi, India.
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1991 Leonard G. Abraham Prize Paper Award from the IEEE Communications Society for "Design and Implementation of a High-Speed Transport Protocol," published in IEEE Trans. on Communications, Nov. 1990.
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President of India's Gold Medal, 1975 . Institution of Engineers (India) Gold Medal, 1975.