6 setting up the dcm – Guralp Systems CMG-DCM User Manual
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Operator's guide
ports are connected to Güralp DM-24 digitizers, whilst the
DATA OUT
port connects the DCM to a computer or serial modem. However, the
labels are provided merely for convenience: internally all three serial
ports behave identically. Thus, if the DCM is connected to a network
over Ethernet, you could use all three ports to communicate with
digitizers. Conversely, if you have only one digitizer attached to a
stand-alone DCM, either or both of the remaining two ports could be
used to transmit data gathered by the module.
A rack-mounted DCM has a
CONSOLE port with a female connector,
corresponding to the
Data out port of the stand-alone model, and nine
serial ports (with male connectors) for communication with digitizers.
If the DCM has a USB
host interface, you can connect it to any USB
peripheral supported by its Linux operating system. For example, you
may want to attach a camera to the DCM, or an additional USB mass
storage device. If there is no hard disk inside the module, it will
automatically search for suitable storage on the USB interface. The
DCM may alternatively have been supplied as a USB
client; if this is
the case, the USB connection can be used to connect the module to a
single computer (see below).
2.6 Setting up the DCM
Once a DCM is installed, it must be configured to your particular
requirements. The easiest way to set up a DCM is through its on-board
Web server, which gives you access to all the module's configuration
options. You can use this Web interface over any network connection
using the HTTP or HTTPS protocols. Alternatively, you can log in to
the DCM's Linux operating system and issue commands directly: see
Web setup
The DCM provides a Web interface which you can use to set up the
system. To access this from anywhere on the local network, open any
web browser and navigate to the IP address of the DCM. For example,
if the DCM has the address 10.82.0.1 you would enter
or
https is a secure variant of the http protocol, which ensures that
network traffic cannot be read in transit. The DCM as supplied accepts
connections only over
https, although this may be altered if required
(see “HTTP server”, page 79.)
Your browser may ask you for a username and password to access the
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