00343nam a2200133Ia 4500008004100000020001500041041001200056082001100068100001900079245007000098260002500168300000800193650000800201221030s9999    xx            000 0 und d  a8120307131  aEnglish  a105.23  aT. Viswanathan 0aTelecommunication Switching Systems & Networkscby T. Viswanathan  bPHIaNew Delhic2011  a583  aECE