If you need to locate the NVD-30 or NVD-35 on your network, here is a link to the IP Scanner utility:
NVD-30 & NVD-35 IP Scanner Download
The utility is for Windows only, if you need to locate the device with a Mac computer, please use LanScan or Fing. The NVD-30 and NVD-35 have a Mac Address on the bottom of the device that will allow you to identify it on your network device tables.