Guralp Systems CMG-DCM - Manual (Page 37)

Operator's guide
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 for client requests, you will
receive a
GCFACKN message from the server which will also
appear in the Control pane.
6. Request data by right-clicking on the server and selecting
GCFSEND:L (or GCFSEND:B) from the pop-up menu.(L is used
for little-endian and B for big-endian byte order, and are
distinguished for compatibility.) Streams should soon begin to
appear in Scream!'s main window.
7. To stop the link, right-click as before and select GCFSTOP from
the pop-up menu. If you do not GCFSTOP, the server will
continue to transmit to a client that is no longer listening. You
should ensure that the server replies with a
GCFACKN message
If an acknowledgement does not appear in the Control pane,
repeat the GCFSTOP command.
CD1.0 and CD1.1
The DCM can be configured to transmit incoming data to a specified
client using the CD1.0 or CD1.1 protocols. If you intend to send CD1.0
or CD1.1 data to a National Data Centre (NDC), the installation will
need to be assigned a unique code by the International Seismic Centre
or with the US's National Earthquake Information Center.
To enable CD1.0 or CD1.1 transmitters, browse to the Data transfer –
CD1 (CD1.0) Sender or Data transfer – CD1.1 Sender page. Fill in the
required data fields and click
Save settings.
Using an Authentication Module (AM), you can cryptographically sign
all outgoing CD1.0 or CD1.1 subframes as they pass through. This is
particularly powerful where the module is physically part of the
sensor casing, as it allows you to generate authenticated data at source,
even within a borehole.
AutoDRM
AutoDRM (Automatic Data Request Manager) is an optional service
which allows you to request data over e-mail. In response to a request,
the AutoDRM can either send an e-mail in return, or establish an FTP
connection to you.
Not all DCMs have these packages installed. If you are unsure, or wish
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