00361nam a2200121Ia 4500008004100000041000800041082001800049100003200067245005300099260005400152300001200206999002100218231228s1998    xx            000 0 und d  aeng  a621.3857bVIS  aVISHWANATHAN (Thiagarajan )  aTelecommunication Swithching Systems and Network  aNew DelhibPrentice Hall of India New Delhic1998  axx, 583  c1082111d1082111