Troubleshooting
Appendix D
AT Command Summary
This Appendix explains the EtherPath's AT command set operation and responses.
AT Commands
The EtherPath recognizes the following AT commands (when AT Dialing is enabled):
ATD <IP>
connect to <IP_address>
ATDT <IP> connect to <IP_address>
ATH[0/1]
on/off hook (ATH<cr> == ATH0)
ATO[0/1]
return to data mode from command mode, if connected
ATE[0/1]
echo off/on (ATE<cr> == ATE0)
ATS0=[0/1]
switch to Client(0) or Server(1) mode, if not connected
ATV[0/1]
terse/verbose response (ATV<cr> == ATV0)
ATZ
reset EtherPath (DOES NOT restore factory defaults)
AT&W
save current settings, including ATE and ATV
AT&Z
reset EtherPath (Same as ATZ)
+++
escape to command mode when connected
AT Command Responses
The serial port responses depend on the ATE setting:
Verbose
Terse
OK
0
CONNECT 1
CARRIER 3
ERROR
4
BUSY
7
AT Command Operation
When ATE1 is in effect, there are some addition error messages such as "Invalid IP address" and
"Invalid Entry"
The ATE and ATV settings are saved in non-volatile memory when the AT&W command is
entered, and those settings are restored when the EtherPath
is reset. The Factory Default setting (main menu, option 6) for both is ON.
Connections are only allowed when DCD Input is HIGH or FORCED HIGH. If not FORCED HIGH, the
DCD Input can be used to drop a connection. One can also use "+++" then ATH<cr> to drop a connection.
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