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Comments:<br />
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(a) 'Automatic duplex' requires that the printer includes a duplex unit.<br />
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(b) When drivers are installed, some of them perform an 'auto-discovery' action to determine the capabilities of the device, and then automatically configure the driver settings to match.<br />
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This isn't always actioned, and even where it is, it doesn't always work, so you may need to configure the driver manually:<br />
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On Windows systems, open the 'Printer Properties' dialogue (whilst logged in with 'administrator' credentials), select the 'Device Settings' tab, and change the value for 'duplex unit' from 'Not installed' to 'Installed'.
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Comments:

(a) 'Automatic duplex' requires that the printer includes a duplex unit.

(b) When drivers are installed, some of them perform an 'auto-discovery' action to determine the capabilities of the device, and then automatically configure the driver settings to match.

This isn't always actioned, and even where it is, it doesn't always work, so you may need to configure the driver manually:

On Windows systems, open the 'Printer Properties' dialogue (whilst logged in with 'administrator' credentials), select the 'Device Settings' tab, and change the value for 'duplex unit' from 'Not installed' to 'Installed'.

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If you select Duplex in Printing Defaults (from printer Properties &gt;&nbsp;Advanced tab) and then from Printing Preferences (from printer Properties &gt;&nbsp;General tab) it should default to duplex. If you print via a server, this needs to be done on the server.<br />
<br />
As DansDadUK explained, this assumes the duplex unit is installed in the printer and in the driver.
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If you select Duplex in Printing Defaults (from printer Properties > Advanced tab) and then from Printing Preferences (from printer Properties > General tab) it should default to duplex. If you print via a server, this needs to be done on the server.

As DansDadUK explained, this assumes the duplex unit is installed in the printer and in the driver.

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I want to find out how to configure my HP LaserJet 5550 printer to print both side automatically &nbsp;
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I want to find out how to configure my HP LaserJet 5550 printer to print both side automatically  

HP LaserJet 5550 printer

A peripheral device is defined as a computer device, such as a keyboard or printer, that is not part of the essential computer (i.e., the memory and microprocessor). These auxiliary devices are intended to be connected to the computer and used in conjunction with it. Examples of external peripherals include mouse, keyboard, printer, monitor, external Zip drive or scanner, while internal peripherals include CD-ROM drive, CD-R drive or internal modem. Today's new devices, such as tablets, smartphones and wearable computing devices are considered peripherals as they can be connected and used on a computer system. The difference, however, is that these devices can run independently of the computer system.

Peripherals

A printer is a peripheral which makes a persistent human readable representation of graphics or text on paper or similar physical media. Traditional printers are being used more for special purposes, like printing photographs or artwork, and are no longer a must-have peripheral; 3D printing has become an area of intense interest, allowing the creation of physical objects. An image scanner is a device that optically scans images, printed text, handwriting, or an object, and converts it to a digital image. Hand-held scanners, where the device is moved by hand, have evolved from text scanning "wands" to 3D scanners used for industrial design, reverse engineering, test and measurement, orthotics, gaming and other applications.