Longshine LCS-US204 - Manual (Page 15)

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Chapter4 Using the USB Device Server
4.1 Introduction
The goal of this produce is to provide the USB device server in a single product. We
developed a new technology called “NetUSB” to achieve this goal. Basically, the
“NetUSB” is a “USB over IP” technology that transparently redirects all USB packets to
TCP/IP network channel. “NetUSB” allows you to use USB devices as if they were
connected directly to your PC although they are actually remotely connected to
LCS-US204 USB device server.
4.2 Connect & Disconnect
“NetUSB” allows you to use USB devices as if they were connected directly to your PC
although they are actually remotely connected to the LCS-US204 USB device server.
The “connect” operation is a software operation that simulates an actual USB device
plug-in. That is to say, when you do a “connect” operation in the Control Center, PC
can then detect a USB device’s plug-in, although actually you do not plug in any USB
device. Similarly, the “disconnect” operation is a software operation that simulates the
disconnection of the USB device. Once the connect operation is successful, the
operations to use that USB device are just the same as if the USB device is directly
connected to the PC.
If a USB device is “connected” by a PC, we say that PC has the ownership of the USB
device. Only one PC can get the ownership of a USB device at the same time.
Therefore, if a USB device is connected by one PC, no other PC can connect this USB
device until this USB device is disconnected.
4.3 Subnet Issue
Before using the NetUSB technology, you must first make sure that your PC can access
to USB device server via TCP/IP. The simplest way to do this is using “Control Center”
to search for the USB device server on the network and change its IP address to be the
same subnet as your PC. If the server and your PC are not in the same TCP/IP subnet,
Control Center will show the server in red, as the following figure. You must change
the IP address (or using DHCP) of the server so that the server and your PC are in the
same subnet. Control Center will show these servers in blue, meaning you can access
these servers by the NetUSB technology.