00324nam a2200133Ia 4500003000400000005001700004008004100021020001900062040002700081100001600108245004900124260000800173260000900181OSt20240219115940.0170524s9999    xx            000 0 und d  a978-8120307131  cIIMT UNIVERSITY MEERUT  aViswanathan 0aTelecommunication Switching System & Network  bPHI  c2007