Guralp Systems CMG-DCM User Manual
Page 124
CMG-DCM Data Communications Module
•
over a serial link to the
DATA OUT port (115200 baud, 8 data
bits, no parity bit, 1 stop bit, no flow control), or
•
over a DHCP-enabled network (using an IP address provided by
the DHCP server.)
From the hard disk
If your DCM does not have access to the Internet, you can update its
software from a connected USB disk. You will need to make a copy of
all the files in the directory
including all subdirectories, in a directory called /cmgdcm/feeds on the
hard disk. On Linux, you can do this with the command
wget -np -nH -m http://www.guralp.net/cmgdcm/feeds
Once the files are on the hard disk, you can install it in a DCM and
transfer the packages with the command
upgrade gfat32
This facility is available with versions 2.10 and greater of the upgrade
package.
Removing support packages
The DCM as shipped includes a package gsl-backdoor which
enables Güralp Systems to respond to support issues by remote
administration (
e.g. installing updated firmware or packages.) If you
prefer not to allow Güralp Systems access to the DCM you should use
the command
ipkg remove gsl-backdoor
to remove the package. This will not affect the operation of the system
in any other way; however, it may prevent Güralp Systems' engineers
from being able to assist you in the event of problems.
ipkg can also be used for other package management tasks; however,
if you remove software from the DCM, or replace packages with
versions incompatible with the rest of the system, you risk leaving the
unit in an unrecoverable state. We recommend that you use only
upgrade wherever possible, to ensure that you have a fully tested set
of packages.
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