3PrefaceThe network disk recorder (WJ-ND400K, WJ-ND400K/G) is designed for use within a surveillance system, andrecord images/audio from the connected network cameras on the hard disk drives. Up to 64 cameras can be con-nected via a network.The HDDs encased in the provided HDD canisters (hereinafter referred as HDD units) can easily be installed/removed in/from this product.It is possible to perform the settings or operate the recorder using a web browser installed on a PC connected to anetwork. (It is necessary to configure the network settings of a PC to operate this product using a PC.)Up to 16 PCs (web browsers) can access the recorder concurrently and it is possible to perform the settings andoperate the recorder. (The maximum number of PCs that can access the recorder varies depending on the network.)About the user manualsThere are 4 manuals provided for the WJ-ND400K, WJ-ND400K/G as follows.Installation Guide: Contains descriptions of how to install/connect this product, and descrip-tions of how to operate this product with the buttons on the front panel.Setup Instructions (PDF): Contain descriptions of how to configure the required settings and how toconnect to other devices.Operating Instructions (PDF) (this book): Contain descriptions of how to operate this product with a PC.Quick Reference Guide: Contains descriptions of how to configure the basic settings and how touse the major functions.Adobe ® Reader ® is required to read the PDF files (the setup instructions and the operating instructions) on the pro-vided CD-ROM.When the Adobe ® Reader ® is not installed on the PC, download the latest Adobe ® Reader ® from the Adobe web siteand install it."WJ-ND400" or "ND400" shown in the instructions and illustrations used in these operating instructions indicate theWJ-ND400K or WJ-ND400K/G.The screens used in these operating instructions show the case of NTSC model.Refer to "readme.txt" on the provided CD-ROM for further information about the optional dedicated software, com-patible cameras and their versions.System requirements for a PCIt is recommended to operate this unit using a PC that meets the following system requirements.OS: Microsoft® Windows Vista® Business SP1 (32-bit)Microsoft® Windows ® XP Professional SP2, SP3*Microsoft® Windows ® XP Home Edition SP2, SP3*OS Language: English, French, Spanish, German, Italian, Russian, ChineseCPU: Pentium® 4 3.0 GHz or fasterMemory: 1 GB or more (512 MB or more is required when using Microsoft ® Windows ® XP.)Monitor: Resolution: 1 024 x 768 pixels or moreColor: 24-bit True color or betterNetwork interface: 10/100/1 000 Mbps Ethernet port x1Web Browser: Windows ® Internet Explorer ® 7.0Microsoft® Internet Explorer ® 6.0 SP2, SP3*Audio interface: Sound card (when using the audio function)