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CHAPTER 4: AT Commands, S-Registers, and Result Codes
Command: DS=y Dial Stored Telephone Number
Values: n=0–1
Default: none
Description: Dial a number previously stored in directory
number y by the &Zy=x command.
Example: ATDS=1
Command: En Echo Command Mode Characters
Values: n=0 or 1
Default: 1
Description: E0 Do not echo keyboard input to the terminal.
E1 Do echo keyboard input to the terminal.
Command: Fn Echo Online Data Characters
Values: n=1
Default: 1
Description: F0 Enable online data character echo. (Not
supported.)
F1 Disable online data character echo (included for
backward compatibility with some software).
Command: Hn Hook Control
Values: n=0 or 1
Default: 0
Description: H0 Go on-hook (hang up).
H1 Go off-hook (make the phone line busy).
Command: In Information Request
Values: n=0–5, 9, 11
Default: None
Description: I0 Display default speed and controller firmware
version.
I1 Calculate and display ROM checksum (for example,
12AB).
I2 Check ROM and verify the checksum, displaying
OK or ERROR.
I3 Display default speed and controller firmware
version.
I4 Display firmware version for data pump
(for example, 94).
I5 Display the board ID: software version, hardware
version, and country ID.