00363nam a2200133Ia 4500008004100000020001500041041001200056100001900068245008400087260002500171300000800196650000800204700001700212221030s9999    xx            000 0 und d  a8120350830  aEnglish  aT. Viswanathan 0aTelecommunication Switching Systems & Networkscby T. Viswanathan, M. Bhatnagar  bPHIaNew Delhic2015  a620  aECE  aM. Bhatnagar