000
00276nam a2200109Ia 4500
008
220201s1999 xx 000 0 eng d
100
_a
VISWANATHANT, T.
245
0
_a
TELECOMMUNICATION SWITCHING SYSTEMS & NETWORK
260
_a
DELHI
_b
PHI
_c
1999
300
_a
583
942
_2
ddc
999
_c
67875
_d
67875