Determine frequency of a dtmf phone, Computer Engineering

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In a DTMF phone a dialling of 8 generates

(A) 1336 Hz- 770 Hz (B) 1209 Hz - 1477 Hz

(C) 1209 Hz- 941 Hz (D) 1336 Hz-852 Hz

Ans:

A dialling of eight generates 1336 Hz-852 Hz, in a DTMF phone.

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