000 00275nam a2200109Ia 4500
008 220201s2001 xx 000 0 eng d
100 _aVISWANANTHAN, T.
245 0 _aTELECOMMUNICATION SWITCHING SYSTEM & NETWORK
260 _aDELHI
_bPHI
_c2001
300 _a583
942 _2ddc
999 _c68256
_d68256