Chapter 3 - AT Commands, S-Registers and Result Codes
33
Command: DS=
n
Dial Stored Telephone Number
Values:
n
= 0–3
Default: none
Description: Dial a number previously stored in directory number
n
by the
&Zn=x
command .
Example: ATDS=3
Command: E
n
Echo Command Mode Characters
Values:
n
= 0 or 1
Default: 1
Description: E0 Do not echo keyboard characters to the computer.
E1 Do echo keyboard characters to the computer.
Command: H
n
On-Hook/Off-Hook Control
Values:
n
= 0 or 1
Default: 0
Description: H0 Go on-hook to hang up.
H1 Go off-hook to make the phone line busy.
Command: I
n
Information Request
Values:
n
= 0–7
Default: None
Description: I0 Display product code. Example: 33600
I1 Calculate and display ROM checksum (e.g., “12AB”).
I2 Calculates the ROM checksum and compares it to the
prestored checksum, displaying
OK
or
ERROR
.
I3 Display the firmware version and application codes.
I4 Display OEM defined identifier string in either binary or
ASCII format.
I5 Display country code (e.g., “NA Ver. 1”).
I6 Display modem data pump model and internal code
version.
I7 Display the DAA code resulting from MCU interrogation
of the DAA for auto DAA recognition. Examples: 000 for
US or Canada, 016 for Japan, 033 for Belgium, 034 for
Finland, 035 for France, 037 for Italy, 038 for Nether-
lands, 039 for Sweden, 040 for Switzerland, and 041 for
UK.
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