8 IP Modem Function
8.4.1 AT command set
The following table lists many standard commands (in alphabetical order). The AT is omitted for
brevity. The discussion of the functions is below the tables in section
8.4.1.1 Standard AT-Commands These commands are based on the old Hayes Modem.
AT
Hayes-Standard
A
Answer Call
Bn
ITU-T modulation
Dnnn
Dial connection, basically phone
number as nnn
E
Echo on/off
H0
Hang up
I
Device Information
L
Speaker Volume
M
Speaker On/Off
N
Auto serial speed
O
Return to data mode
Q
Result Codes
S=nn/S?
S-Register
V0/1
Responses
X
Busy/Dial detect
Z
Reset to User profile
8.4.1.2 Extended AT-Commands These commands are used in modern modems, and have slightly
different syntax depending on the model.
AT
Standard-Extensions
&C
DCD control
&D
DTR meaning
&F
Load factory Default
&K
Flow Control
&S
DSR control
&V
View Profiles
&W
Store Profile
&Zn=dd
Save for short dial
%C1
V.42bis enable
\Q
Flow control
September 2016
Table 20: IP Modem Standard AT-Commands
IP Modem Function
When to turn on DCD (by IP Modems DTR)
Hang Up, Command Mode or Reset
When to turn on DSR (by IP Modems DTR)
&W0/&W1 is "Standard". ATZ1 loads profile 1
Define possible targets by DNS name or IP Address
Ignored
See &K
Table 21: IP Modem Extended AT-Commands
NetCom Plus User Manual
8.5
below.
IP Modem Function
Accept a connection
Define some modem operation modes
Connect to the target system by
IP Address and TCP-Port. E.g.
ATD10,0,8,42,2023 will "dial" to port
2023 on IP Address 10.0.8.42
Enable/Disable local echo of command
Terminate the TCP connection
I0 through I9 report information
Ignored, always answered with OK
Ignored, always answered with OK
N0 no Auto, N1 reports error
Enable or disable result codes/strings
Set/request configuration registers
Numeric/text responses to commands
Ignored, always answered with OK
Standard
98
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