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Operator's guide
Click Save changes to save the configuration and start writing SEED volumes.
One volume will be written for each stream every three hours. The DCM will
always start a new volume if it is power cycled; the aborted file will still be a
valid SEED volume.
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.
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. Click the My Client 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 DCM, separated
by a colon : (e.g. 192.168.0.2:12345)
5. Test communications by right-clicking on the newly-added server, and
selecting GCFPING. A message appears in the Control pane logging
the ping being sent. If communication is good, and the server is enabled
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