combineNetworkSource
The combination is on a per network basis, so the first network source that contains a given network is used.
Example
<combineNetworkSource>
<winstonNetworkSource>
<stationFile>winstonStations.csv</stationFile>
<host>winston.seismo.univ.edu</host>
<port>16022</port>
</winstonNetworkSource>
<networkFinder>
<name>IRIS_NetworkDC</name>
<dns>edu/iris/dmc</dns>
<refreshInterval>
<unit>MINUTE</unit>
<value>3000</value>
</refreshInterval>
<filterURL>http://seis.sc.edu/GEE/Dynamic/GEE_2.1/configs/filterStations.txt</filterURL>
</networkFinder>
</combineNetworkSource>
Places this can be found
In networkSource there is a choice between all of the following