00412    a2200133   4500020001600000040000800016082001000024100002200034245004200056260004200098300003400140500005000174650005400224  a 8120311183  aDLC  a004.6  aGupta, Prakash C.  aData CommunicationscPrakash C. Gupta  a New Delhi :b Prentice-Hall,cc1996.  axiii, 475 p. :bill.,c24 cm.  aIncludes bibliographical references and index  a1.Data transmission systems.2.Digital Electronics