Computer Networks

1:

 What signal-to-noise ratio is needed to put a T1 carrier on a T0-kHz line ?

A.

63 db

B.

73 db

C.

83 db

D.

 93 db 

 

Answer : D

Explanation :

 

To send a T1 signal we need
Hlog2, (1 + S / N ) = 1.544 x 106 with 50,000.  
S / N = 230 -1,48 ~  93 db. 

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Option: A

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