CMG-DCM / AM - Güralp Systems Limited

CMG-DCM Data Communications Module
Real-time data transmission
You can use the DATA OUT port (or any of the DCM's serial ports) in
several ways, depending on the service you have chosen to run on the
port.
• By default, the DATA OUT port runs the getty service, which
allows you to connect to the DCM's console.
• The mgetty and mgetty_raw services are similar, but can deal
with connections made through modems.
• The gcf_out service causes the DCM to combine the incoming
GCF streams and send them on transparently, as for a Güralp
SAM or CRM.
• The gcf_in service turns the port into an extra digital data input
port. The DCM's PORT A and PORT B run the gcf_in service.
To change the service running on a port, click the Configure – Port link
in the serial port table, and set the serial.x.service option to the
required value. Alternatively, issue the command
gcfgdbset serial.x.service service
Scream! server
In a straightforward vault installation, we recommend that you leave
the DATA OUT port running the getty service for emergency console
access, and instruct the DCM to act as a server for incoming data on
your network. This can be done from the Data transfer – Scream
server page on the Web site:
1. Enable the Scream! server on the DCM by setting
datatransfer.scream.server to on and
datatransfer.scream.server.allowserialaccess to yes. Make a note
of the port number datatransfer.scream.server.port, or change it
to another. Click Save settings.
2. Start up Scream!, and select Windows – Network Control...
from the main menu. Switch to the My Clien tab.
3. If it is not already selected, check Receive Data to start Scream!
listening.
4. Right-click anywhere in the Servers list box, and select Add
UDP Server.... Enter the IP address and port number of the
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