000 00315nam a22001337a 4500
003 OSt
100 _aVishwanathan
245 _aTelecommunication Switching Systems and Networks
250 _a2nd
260 _aNew Delhi
_bP H I
_c2015
365 _b395
_cINR
_eGIA
_h15
700 _aViswanathan
942 _2ddc
_cBK
_02
999 _c889772
_d889772