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Without Echo:
In Modem Mode, echo refers to the echo of all of the characters entered
in command mode; it does not mean to echo data that is transferred.
Quiet Mode (without echo) refers to the modem not sending an answer
to the commands received (or displaying what was typed).
Data Echo &
Modem Response
Full Verbose: The unit echoes modem commands and responds to a
command with a message string shown in the table below.
Numeric Response: The unit echoes modem commands and responds
to a command with a numeric response.
Modem Responses
Only
Full Verbose: The unit does not echo modem commands and responds
to a command with a message string shown in the table below.
Numeric Response: The unit does not echo modem commands and
responds to a command with a numeric response.
Message Meaning
OK Command was executed without error.
CONNECT A network connection has been established.
DISCONNECT A network connection has been closed.
RING n.n.n.n.
A remote device, having IP address n.n.n.n, is connecting to this
device.
Message Meaning
OK Command was executed without error.
CONNECT A network connection has been established
NO CARRIER A network connection has been closed.
RING n.n.n.n
A remote device, having IP address n.n.n.n, is connecting to this
device.
0 OK
1 Connected
2 Ring
3 No Carrier
4 Error
Received commands must begin with the two-character sequence AT and must be terminated with a
carriage return character.
Any character sequence received not starting with AT will be ignored. The unit will only recognize and
process single AT-style commands. Compound AT commands will be treated as unrecognized commands.
If the Full Verbose option is in effect, an unrecognized command string that is otherwise formatted
correctly (begins with AT and ends with carriage return) will be responded to with the OK message and no
further action is taken.
If the Numeric Response option is in effect, unrecognized command strings that are otherwise formatted
correctly will be responded to with OK and no further action is taken.
When an active connection is in effect, the unit will be transferring data and will not process commands
received from the serial interface.
When a connection is terminated or lost, the unit will revert to command mode.
When an active connection is in effect, the unit will terminate the connection if the following sequence is
received from the attached serial device:
1. No serial data is received for one second.
2. The character sequence +++ is received, with no more than one second between each two characters.
NET485 User Guide 3-33