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Q7. Match the modem AT command and response.
    A. ATDT     1. Causes the modem to switch on the speaker
    B. ATM0     2. Causes the modem to dial a given number in touch tone mode
    C. ATM1     3. Causes the modem to dial a given number in pulse mode
    D. ATDP     4. Causes the modem to switch off the speaker

1. A--1; B--4; C--2; D--3
2. A--2; B--1; C--3; D--4
3. A--2; B--1; C--4; D--3
4. A--2; B--4; C--1; D--3

 

Correct Answer: D.

 Explanation: 

Following are some important modem commands:
1. ATDT: Instructs the modem to dial in touch tone mode
2. ATDP: Instructs the modem to dial in pulse mode
3. ATH: Instructs the modem to hang-up
4. ATM0: Turns off the modem speaker
5. ATM1: Turns on the modem speaker

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