00579nam a2200169 a 4500999001700000020002700017020003000044100001200074245004700086260003100133300002100164650001300185650002200198856007000220942000700290952011200297  c14621d14621  a9351070298 (paperback)  a9789351070290 (paperback)1 aHebbar.10aIntroduction to Digital Switching System /  a[S.l.] :bElsevier,c2012.  a1 v. (unpaged) ;  aDigital   aSwitching System 40uhttp://www.amazon.com/exec/obidos/ASIN/9351070298/chopaconline-20  cBK  00104070aQUESTCLbQUESTCLd2015-11-09g943.00l0o621.319HEBp53560r2015-11-09 00:00:00w2015-11-09yBK