000 00277nam a2200109Ia 4500
082 _a621.3811 VIS
100 _aVISWANATHAN ,THIGARAJAN
245 _aTELECOMMUNICATION SWITCHING SYSTEMS AND NETWORKS
260 _bPRENTICE HALL OF INDIA
_c1996
300 _a583
942 _2ddc
_cB
999 _c54050
_d54050