What command is used to hang up a MODEM when using the “AT Command set”? A. ATZ B. ATD C. ATR D. ATH E. None of the above

ATZ
ATD
ATR
ATH E. None of the above

The correct answer is: D. ATH

The AT command set is a standard set of commands used to control modems. The ATH command is used to hang up a modem.

The ATZ command is used to reset a modem. The ATD command is used to dial a phone number. The ATR command is used to get the modem’s response code.

None of the other options are correct.