Guralp Systems CD1.1 - Manual (Page 33)

Operator's Guide
6 Using the CD1.1 Receiver
The data-in-cd11 module receives CD1.1 frames from
external CD1.1 Data Producers (DPs). It is typically used at an
array data centre, where it receives data frames from any DPs
in the array; typically each array element or station will have
its own CD1.1 sender. The receiver is responsible for tracking
the sequence numbers of received frames and issuing
retransmission requests when missing frames are detected.
Received frames are passed to the data-mux-cd11 module for
storage and forwarding.
6.1 Creating a new CD1.1 receiver instance
In the web interface, select “Configuration -> Services” from
the left-hand menu or from the command line, run
gconfig
and then select “System services”.
Now choose “data-in-cd11 -- CD1.1 receiver” to view a list of
configured receiver instances. You can choose to either
configure any existing instance (as described in the following
section) or select “Create new service instance” to create a
new one.
A form is displayed which allows you to set various parameters
for the instance. Each parameter is discussed in the following
section. After entering the desired configuration for the
instance, choose Submit.
This will create (if it is new) and configure the receiver
instance. If it is not already running, you can start it by using
“Control -> Services” on the web menu or by running
/etc/init.local/data-in-cd11.0 start
from the command line.
The zero after the period in the command name determines
which receiver instance is to be started, so the command to
start a second instance would be
/etc/init.local/data-in-cd11.1 start
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