Guralp Systems CMG-DCM build <10,000 - Manual (Page 203)

Acquisition Modules and Platinum Firmware Building Networks
13 Building Networks
13.1 GDI-link
The GDI-link protocol provides the most efficient means of exchanging data
between two systems running Platinum firmware. GDI is the native data
format of the central data multiplexer, the gdi­base module, and GDI-link
allows highly efficient, low latency data exchange between two such
multiplexers without the overhead of any additional protocol conversion.
State of health information is attached to samples before transmission.
GDI links have transmitters, which send data, and receivers which receive it.
These terms do not refer to the direction of initiation of the network
connection: a receiver can initiate a connection to a transmitter and vice
versa.
A single GDI-link receiver can accept data from multiple transmitters and a
single transmitter can send data to multiple receivers, allowing maximum
flexibility in configuring seismic networks.
Caution: The GDI link transmitter generates back-fill files which it
does not delete. If ignored, these files will accumulate and
eventually fill the file system. It is necessary to configure a
directory cleaner to remove these files. See section 13.1.1.3 on page
207 for details.
13.1.1 The GDI-link transmitter
To configure a GDI-link transmitter via the web interface select:
Configuration → Services → GDI
or
Configuration → All options → System services → GDI
Now select “gdi-link-tx - GDI link transmitter”. The screen shows a list of all
GDI link transmitter instances that have been configured on the acquisition
module.
In most circumstances you will only need a single GDI link transmitter but
this screen allows you to create more if desired.
MAN-EAM-0003 203 Issue E - February 2014