Guralp Systems CMG-DCM User Manual

Page 13

Operator's guide

Windows, can be used for this.

3. Configure the baud rate of the serial link. By default, the DCM

uses a baud rate of 115200, with 8 data bits, no parity bit, and
one stop bit, and

without flow control.

4. Log in with your username and password, or root if you have

not

yet

created

one.

See

for full information on how to set up

terminal emulation under Linux.

5. You now have access to the DCM's console and all of its

functions. You should change your password, if you have not
done so already, with the command passwd

For full details on how you can configure the serial ports of the DCM,
see Section 6.2, page 82.

Connecting over Ethernet

You can use a “crossover” Ethernet cable to connect the DCM directly
to your computer. This has the same effect as connecting the DCM and

your computer to a separate hub using standard Ethernet cables: the
two machines will consitute a network segment, and each will have its

own IP address on that segment. See Section 2.4, page 15, for details
on how to configure TCP/IP on the DCM.

If your computer has two network interfaces, and one is connected to a

local area network, you may be able to set up a network bridge
between the DCM's segment and the rest of the network. For example,

if you are using Microsoft Windows XP:

1. Connect to the DCM's console over a serial link.

2. Because you are connecting the DCM to a single computer, you

will probably not be able to use DHCP. You should configure the

DCM to disable DHCP and use an IP address in a private range
such as 192.168.0.x:

gcfgdbset net.eth.0 static

gcfgdbset net.eth.0.address 192.168.0.2

gcfgdbset net.eth.0.netmask 255.255.255.0

Here, 192.168.0.2 should be replaced with the IP address you

want the DCM to use.

December 2006