Adding more detail to RYAT's reply, log into your router web UI using a browser on a PC located in the same LAN as your router and DCS-930L. The router user interface should have a page listing the IP address of all devices currently connected to the router along with the device MAC address, and in some cases, the product name, if it's broadcast by the device.
Please post back if you have any issues identifying your DCS-930L IP address.