Getting Started
Dialup / Leased Line Modem
11
Setting DLM for Leased-Line Operation
When the DLM is used with a Leased-Line one DLM must be set up to “originate” the
connections and the other DLM set up to “answer”. With the exception of the &L1 and &2
commands described in step 6 below the commands to set up the DLM will be the same.
The following procedure will set up the DLM to automatically connect without any intervention
from either connected device. You do not need to have any device connected to the RS232
port.
Each of the following commands will be entered then followed with a carriage return (Enter
Key). After entering each command wait for the “OK” response.
1. Turn on the DLM and as soon as the “DSR” and “CTS” lights turn on enter: AT%DC0
NOTE 1: You may not get a response from this command. The leased line
configuration disables the response to commands as well as the echoing of
characters.
NOTE 2: When used with Leased-Lines the DLM will be set up to ignore any
commands. To break out of this mode the “%DC0” command must be sent
within the first 10 seconds after power up.
2. Reset the DLM to its factory defaults by entering: AT&F0
NOTE 1: You will get an “OK” response from this command.
NOTE 2: We recommend always restoring the DLM to factory defaults and
reentering all settings in this procedure. This guarantees the DLM is in a
known condition.
3. Depending on the data rate of your connection enter one of the following command
strings:
a. 19200
bps: AT$MS=V32B,0,0,19200,0,19200
b. 9600
bps:
AT$MS=V32,0,0,9600,0,9600
c. 1200
bps:
AT$MS=V22,0,0,1200,0,1200
d. 300
bps:
AT$SB300+MS=V21,0,0,300,0,300
4. Depending on the data format of your connection enter one of the following command
strings:
a. 8 data bits, no parity, 1 stop bit:
AT$EB0
b. 8 data bits, even or odd parity, 1 stop bit: AT$EB1#P1
c. 8 data bits, no parity, 2 stop bits:
AT$EB1#P2
d. 8 data bits, even or odd parity, 2 stop bits: AT$EB1#P0
e. 7 data bits, no parity, 1 stop bit:
AT$EB0
f. 7 data bits, even or odd parity, 1 stop bit: AT$EB0
g. 7 data bits, no parity, 2 stop bits:
AT$EB0
h. 7 data bits, even or odd parity, 2 stop bits: AT$EB1#P0
