Multitech RF500S Uživatelský manuál stáhnout pdf (Strana 38)

The printer is a HP 2000 using a HP JetDirect 300X print server. Many different print servers are on the

market. The print driver runs on the machine requesting the print job. The output of the driver is sent to the

printer over the network. This works much better then peer-to-peer printing used previously. The print

server itself is a little box, the sizes of an analog modem. It has a built in web server to manage the print

server.

Not all printers can be connected to a print server. Our original printer used the Windows Graphic Device

Interface (GDI) that is incompatible with print servers.

Configuration Tip -- The LAN is not able to resolve the print server name. The server must be

accessed by IP address. This is inconvenient if the address keeps changing. The router’s quasi-

static address feature comes in handy. Once the router assigns the server an address it frozen. This

locks the address to the specific Ethernet MAC address. The MAC address is a unique address

assigned by the manufacture to each device.

15 Scanning -- Paper to Information

Flat bed scanners allow documents or photographs to be converted to an image file. These files can be

faxed or incorporated into other documents. Text documents can be processed by Optical Character

Recognition (OCR) software to convert the graphics images to text that can be understood by text editors.

The scanner is an Umax 2200 it uses USB to connect to the computer.

The scanner also functions as a poor mans copying machine. Scanned images can be sent directly to the

printer.

16 Local Server – Just Like the Big Kids

The server performs several tasks, file sharing, real time clock synchronization, and private web server. At

first we used a laptop as a server. This was convenient because it was self-contained but it had limited disk

storage capacity. When the laptop died it was replaced with a recycled 200Mz Pentium desktop with a

45GB hard drive. If storage requirements grow it has room for another disk.

16.1 File Sharing

One of the benefits of having a network is the ease with which files can be transferred between machines.

This allows online backup of important files.

File sharing makes bringing up a new computer easier since drivers and applications are all located in one

convenient place.

Windows makes connecting to remote drives easy. The user can connect to a remote drive as needed or

Windows can automatically connect at boot time. Mapped drives show up as additional drive letters. In a

peer-to-peer environment shares can be password protected to limit access.

Security Tip -- Some of the most dangerous viruses look for shared drives. If they find a shared

drive they can wreak havoc on it not just the machine the virus is on. Password protects any shares

that contain valuable data.

16.2 Atomic Time

The Internet allows access to extremely accurate time. This eliminates the problem of drifting and

inaccurate computer clocks. We use a program called Tardis 2000. The software runs on the local server

and periodically polls a public timeserver. In the US the National Institute Standards and Test (NIST)

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Multitech RF500S Uživatelský manuál Strana 38