VNC Server Gateway(tm) product - For iSeries, Unix, and Linux Systems

eXport Ventures' RPG GUI/400(tm) for the IBM iSeries implements the identical windowing system that is used on all UNIX and Linux operating systems.  This system is called “X Window” and consists of two components, a client and a server.   X Window terminology may be confusing when first encountered.  For example, the application needing X Window graphic services communicates with the X Window client.  The client communicates over a network to an X Window server using X Window protocol.  The server renders the graphics into image-memory for display. 

The common methods for implementing the X Window server are:

1. Located in the same system as the client.  If so, the network communications is contained internally. 

2. Located in a separate networked display terminal that is usually a smart workstation.  The X Window server is provided with all UNIX and Linux distributions and can be purchased for workstations running Microsoft, Apple, and other operating systems.

3. Located in a networked Server Gateway using VNC ... we call it the VNC Server Gateway ... this is a true turnkey product! 

Server-Gateway Implementation

The VNC Server-Gateway implementation uses a SUN Microsystems i86 Server or Workstation running the Solaris 10 operating system.  The hardware specifications are listed in the Hardware section.  The VNC Server software provides the unique capability of allowing for both dynamic and static sessions.  

What is VNC?  

Virtual Network Computing (VNC) is open-source software that provides remote access to graphical applications with display devices ranging from desktops to PDAs.  There are two primary components to VNC, the server and the viewer.  The VNC server runs on the VNC Server-Gateway and device-specific VNC Viewers run on the remote devices.    

What functions does VNC provide?

The VNC server provides three functionalities to accomplish remote access.  First it acts as a display that “displays” the image only in memory.  Second, VNC continually monitors this memory for changes and sends these changes to the remote VNC viewer. Finally, it passes keystrokes and pointer coordinates from the viewer to the virtual display. 

What advantages does VNC provide?

Some of the advantages of using VNC rather than X Window terminals are as follows:

1. Easy and fast to install.  Non-technical users can be easily trained to install the VNC Viewer on workstations or PDAs. 
2. VNC Screens can be shared among users. 
3. Pre-allocated sessions remain after disconnection.  Therefore, if session is interrupted, it can be simply restored with the session screens fully intact.
4. Performance - Highly compressed network-data for optimal network performance as opposed to the X Window protocol. 
5. VNC Viewer’s file size is very small at approximately 105Kb.  Therefore:
   1. Minimal Viewer maintenance required.
   2. All font storage and management is located on the VNC Server.  None is installed within the Viewer.
6. Development - Screens can be easily sized to meet the viewing devices specifications.

Price: $3,590 includes: VNC Server Software, customization, Sun's Sun Fire X21 system, and shipping/handling in Continental USA.

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