By which digits are represented, in a dtmf phone, Computer Engineering

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In a DTMF phone, digits are represented by:

(A)  Orthogonal frequencies.

(B)  Orthogonal Phases.

(C)  Orthogonal codes.

(D)  Orthogonal pulses.

Ans:

Digits are represented through orthogonal frequencies in a DTMF phone.


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