Hardware Installation
Dialup / Leased Line Modem
7
NOTE:
In some cases you can simply check the connection by entering just the
“AT” command and watching for “AT” to be echoed followed by “OK”. The
echoing of command characters as well as the response codes can be
disabled so simply entering “AT” will not work. Also when used in the
Leased-Line mode the DLM will only accept commands within the first 10
seconds after power up. Following the above procedure of cycling the
power then entering “ATi” will work in all cases.
Connecting to AGM Data Handler (DH) RS232
To connect a DLM to a RS232 Data Handler you will need a 9 pin female to 9 pin male null-
modem cable.
1. Plug one end of the RS232 cable into the 9 pin male connector on the Data Handler.
2. Plug the other end of the RS232 cable into the 9 pin female D connector on top of the
DLM.
3. Power up both the Data Handler and DLM. If properly connected the “DTR”, “DSR”,
“CTS” and “RTS” lights should be on. If “RTS” light is off the Data Handler may be
configured for half-duplex operation you may either turn off the half-duplex in the Data
Handler or disable the hardware handshaking in the DLM. Hardware handshaking
may be disabled by connecting the DLM to a computer then entering “AT&K0&W0”.
Connecting to AGM Integrated Control Station (ICS)
To connect a DLM to an ICS you will need a 9 pin male to 25 pin female straight through
cable.
1. Plug the 25 pin end of the cable of the RS232 cable into the 25 pin D connector on the
back of the ICS.
2. Plug the other end of the RS232 cable into the 9 pin female D connector on top of the
DLM.
3. Power up both the ICS and DLM. If properly configured the “DTR”, “DSR”, “CTS”, and
“RTS” lights should be on. If these lights are not on check your cable connections.
