000
00275nam a2200109Ia 4500
008
220201s2001 xx 000 0 eng d
100
_a
VISWANANTHAN, T.
245
0
_a
TELECOMMUNICATION SWITCHING SYSTEM & NETWORK
260
_a
DELHI
_b
PHI
_c
2001
300
_a
583
942
_2
ddc
999
_c
68256
_d
68256