User manual

Copyright © Dr Robot Inc. 2006
106
Normally, there is a modem connected to a local PC and a modem connected to a remote
machine. A user must dial from the local PC to the remote machine, accumulating phone
charges for each connection. Modem Mode allows you to replace modems with WFS802bs,
and to use an Ethernet connection instead of a phone call. By not having to change
communications applications, you avoid potentially expensive phone calls.
To select Modem Mode, set the Connect Mode to C6 (no echo), D6 (echo with full
verbose), or D7 (echo with 1-character response).
Note: If the unit is in Modem Mode, and the serial port is idle, the unit can still accept network
TCP connections to the serial port if Connect Mode is set to C6 (no echo), D6 (echo with full
verbose), or D7 (echo with 1-character response).
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).
Full Verbose The unit echoes modem commands and responds to a
command with a message string shown in the table below.
1-Character
Response
The unit echoes modem commands and responds to a
command with a single character response.
Table IV.11 Modem Mode Messages
Message Meaning
Full Verbose
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.
1-Character Response
0 OK
1 Connected
2 Ring
3 No Carrier
4 Error
Received commands must begin with the two-character sequence AT and be
terminated with a carriage return character.
The unit ignores any character sequence received
not starting with AT, and only recognizes
and processes single AT-style commands. The unit treats compound AT commands as
unrecognized commands.
If the Full Verbose option is in effect, the unit responds to an unrecognized command string
that is otherwise formatted correctly (begins with AT and ends with carriage return) with the
OK message and takes no further action.
If the 1-Character Response option is in effect, the unit responds to an unrecognized
command string that is otherwise formatted correctly with
OK and takes no further action.