Using the MSS Modem Emulation Mode
5-11
Modem Mode Commands
The following commands are only available when the serial port is in Modem Emulation mode—they will
have no effect when entered at the Local> prompt.
Multiple commands can be entered on the same line (for example, ATE0Q1V0 will be processed the same
as if each command were entered separately). However, if the MSS encounters a command that it doesn’t
recognize, it will ignore the whole command line. For this reason, you should enter only one command per
line.
Table 5-2: Modem Mode Commands
Command Function
AT? Help; gives list of valid AT commands.
ATC <command> Pass-through to normal command line interface..
Ex: ATC CH NAMESERV 192.0.1.76
ATDT <ipaddress> Ex: ATDT 192.0.55.22:3001T
Ex: ATDT 192000055022:3001T
Users can specify sockets as well; in the examples, :3001T tells the
MSS to form a raw TCP connection to socket 3001.
ATE Echo mode off (ATE0) or on (ATE1, the default).
ATH Disconnects the network session.
ATI Displays modem version information.
ATQ Result codes on (ATQ0, the default) or off (ATQ1).
ATS Allows serially-attached devices to control how the MSS accepts a
network call.
ATS0=0 will cause the MSS to send the RING string to the serial
device when it receives a network connection request. The serial
device must reply with the ATA string.
ATS0=1 allows the MSS to automatically accept network
connections (the default).
ATV Displays result codes. There are four options:
ATV0 = text codes, unknown commands cause an error.
ATV1 = numeric codes, unknown commands cause an error.
ATV2 = numeric codes, discard unknown commands.
ATV3 = text codes, discard unknown commands.
ATZ Accepted but ignored.
AT&F Resets modem NVR to factory default settings.
AT&W Writes modem settings to NVR.
AT&Z Restores modem settings from NVR.
+++ Returns the user to the command prompt when entered from the
serial port during a remote host connection.
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