000 00233nam a2200097Ia 4500
100 _aVISWANATHAN ,THIGARAJAN
245 _aTELECOMMUNICATION SWITCHING SYSTEMS AND NETWORKS
260 _bP.H.I.
_c2003
300 _a583
942 _2ddc
_cSC
999 _c77547
_d77547