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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:
E
n
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:
F
n
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:
H
n
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:
I
n
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.
