000 00448nam a2200181Ia 4500
008 220901s9999 xx 000 0 und d
041 _a  ENGLISH
082 _a621.382.382
082 _bVIS
100 _aVISHWANATHAN, T.
245 0 _aTELECOMMUNICATION SWITCHING SYSTEMS AND NETWORKS.
250 _b2011
260 _aNEW DELHI
260 _bPHI LEARNING PVT. LTD
300 _a583
650 _a  TELECOMMUNICATION
942 _cREF
999 _c136001
_d136001