00378nam a2200133Ia 4500008004100000020001500041041001200056082001600068100001900084245008700103260002500190300000800215650002100223221030s9999    xx            000 0 und d  a8120307135  aEnglish  a105.23bVis  aT. Viswanathan 0aTelecommunication Switching Systems & Networks ( DEPARTMENTAL )cby T. Viswanathan  bPHIaNew Delhic2001  a583  aECE Departmental