We are currently testing an on-line version of the NetDC request protocol. This simple Web GUI allows for creation of a request for inventory information from the participating NetDC data centers as well as response and waveform data.
If you would like to try this new tool, it can be found here: http://ds.iris.edu/SeismiQuery/bin/netdcForm.htm
More detailed information about NetDC can be found here:
by Rob Casey (IRIS Data Management Center)