27 Jan 2009

HP LaserJet Printer Repair and Refurbishment

Your Hewlett-Packard (HP) printer is known as one of the most reliable printers in the world. This reliability makes it one of the top choices of printer brands. In particular, the LaserJet series of HP printers are engineered and manufactured to give you a very long service life with minimal maintenance. However, as they get older, they will still need to be maintained. As with many pieces of technology, a lot of things can go wrong with your HP printer if it is used improperly, or not maintained properly.

Fortunately, Hewlett-Packard does not make their printers as disposable pieces of equipment. With the help of an HP printer repair specialist, most of the problems of your HP printer can be fixed.

Repairs bring you back to form


If your printing jobs go pear-shaped, your manual can give you advice on how to troubleshoot your printer. Sometimes, print errors are merely a result of improper placement of paper, using the wrong type of paper, loose connectors or cords, or software driver issues. However, if your own troubleshooting efforts don’t fix the problem, then you need professional help. Although HP printers are not difficult to maintain, these occasional difficult problems can still crop up.

Within the Greater and Central London, Hertfordshire, Bedfordshire, and Milton Keynes area, our HP printer repair specialists can get to you promptly without call-out charge. And should your printer actually need technical repairs, you will only be charged if we are able to fix your printer. Rest assured that when we do fix your HP printer, it will be close to being as good as new. We are also your one-stop shop for consumables for your HP printer, like toner cartridges, as well as replacement parts like fuser assemblies and pickup rollers.

Refurbished: good as new for less


HP printers are very reliable and essential technological equipment. Every home or office should have one. It’s this dependency which can become very problematic should your printer fail and be in need of repair. We are able to offer on-site maintenance of your HP printer, but sometimes repairs have to be done in the workshop. For the budget - conscious, we have fixed charges for both on-site and workshop repairs. But what will you do in the meantime? We have a “solution” – we keep most HP models available as loans or rentals.

Because of the reliability of HP printers, refurbished printers can function as good as brand new printers (the old ones are the best ones often springs to mind). Refurbished HP printers are used printers that we have stripped, cleaned, repaired where necessary, and restored back to serviceable life. HP provides many replacement parts for essential components and with expert technical knowledge, we are able to provide you a loan printer while we are repairing your own HP printer. Your work should not have to stop just because your printer has stopped printing.

Maintenance is the key

For all HP printer models, whether LaserJet or other series of HP printers, you will need to keep them in tiptop shape so they live out their service life with minimal problems. In your area, our HP printer engineers can help provide regular maintenance of your HP printer, including replacement parts and genuine HP consumables. Our maintenance contracts will make sure your HP printers remain reliable to you.


Rapid Response


Can you think of anything worse than having to transport a heavy printer to you nearest repair centre/shop? Getting an engineer to your doorstep as soon as possible is our first aim, repairing it is our second.

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Fast HP Printer Repairs

If you’ve ever had to maintain your HP printer by yourself, then you’ll have encountered some of the usual printer problems that all users have to face. Fortunately, these don’t happen all that often if you use your printer correctly. Your user manual should provide you with a lot of useful information that can help you avoid a lot of printer problems.

HP printers are also very well made and, with proper use, should give you a long service life. But printer problems do happen occasionally and it would be useful to know some fast HP printer repair tips that you can do on your own.

Solving paper jams

Paper jams (Error 13) can occur when the paper enters the printer, during the exit, and anywhere in between (registration). If the paper jams as it enters or is not picked up from the tray, check the pickup roller. If it’s shiny, it’s already worn out and needs to be replaced. You can try to clean the roller with specialist solvents and the paper path from paper debris or torn bits of paper.

The roller assembly can also get clogged up with fragments of paper and you need to clean that as well. Exit paper jams can be caused by a blocked exit sensor. Clean off the sensor and check the plastic arms that swing in front of the sensor and see if they move smoothly. Common sense and a torch are usually all you need to isolate the cause of the jam.

Paper out when there is paper

A paper out (Error 02) message can occur even if your input bin has paper. The size of the paper that you put in the bin is detected by actuating tabs. Try to adjust the tabs correctly for the paper that you put in the tray. Also, make sure that the paper is actually seated properly in the paper tray.

Cartridge and memory issues


Make sure that the toner cartridges are properly seated if the printer says that no EP cartridge (Error 14) is detected. If the toner low (Error 16) message is given, it is possible to slightly extend the life of your toner cartridge. Gently rock the cartridge to redistribute the toner. Buy a new cartridge as soon as possible.

There are a few error messages (Error codes 20, 21, 25) that pertain to memory issues, like overflow memory or full memory. You can fix these errors by reducing the quality of your print job or by simplifying your print job, like reducing the number of pages sent to the printer.

Beyond DIY

If after all these quick fixes don’t resolve your printer issues, then it’s time to “bite the bullet” and call for an HP printer repair specialist. If you see error codes that you don’t understand, then it’s better that you don’t try anything you are not comfortable doing or are not familiar handling, as further damage or even injury can result.

But this doesn’t mean that fast HP printer repair services are beyond your reach. Within Greater London, Central London, Hertfordshire, Bedfordshire, and Milton Keynes, we provide prompt and reliable printer repair services. Call-outs have no charges and if we can’t fix it, we won’t charge you.

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CAT5e Cabling or CAT6a Cabling?

If you’ve been planning to install, upgrade, or extend the computer network in your home or office, you’ve probably been working with a data cabling engineer to help you work out what you will need. You’ve also probably been wondering why it would really need a specialist to lay down what looks just like fancy electrical wiring. Look at it from the point of view, that if the cabling doesn’t work, the network doesn’t work!

Choosing the right cable category


Using the right network cabling allows your network to send and receive data near the maximum speed that your data connections allow. If you have more than one computer or data device, using the right computer cabling will allow your machines to communicate as efficiently as possible.

You and the cabling service engineer have 4 options to choose from when it comes to the most up-to-date standards of data cabling: Category 5e, Category 6, Category 6a and Fibre Optic. Lets leave Fibre Optic out of the equation for now. Your decision will mainly depend on your network data transmission speed, the data type you are transmitting, and your requirements for speed and efficiency of data transfer.

Category 5 and 5e cables


The original Category 5 (CAT5) cables consist of 4 pairs of twisting copper wiring. They are rated at transmitting signals of up to 100 MHz. They were originally rated for use in Ethernet networks running at 100 Mbit/s. Newer Gigabit (or 1000BASE-T) Ethernets were designed to work with CAT5 cables as well.

In 2001, Category 5e (CAT5e) cables were introduced. These cables are basically the same as CAT5 cables except that there is less data signal loss. This data loss comes from electrical interference (called crosstalk) coming from neighbouring wire pairs, other nearby electrical wiring, or the devices the cable was attached to.

Category 6 and 6a cables


In 2008, a new standard for data cabling was established: Category 6. These are essentially the same as CAT5/5e cables except that they transmit at frequencies of up to 350 MHz. This allows for greater data transmission speed; up to 10 Gbit/s! An upgraded version soon came out with Augmented Category 6 (CAT6a) cables, which are able to operate at 550 MHz, doubling the efficiency of data transmission of CAT6 cables. CAT6/6a cables are also required to produce less crosstalk than CAT5/5e cables, meaning less data loss and less reduction in transmission speed. CAT6 cables are also back-compatible with CAT5/5e cables.

So what do you get?


Your choice of cables will really depend on your Ethernet network. If you’ll be or you are running a 10GBASE-T Ethernet network, CAT6a cables will be just the ticket. If your Ethernet is 100BASE-T or 100BASE-TX, CAT5e cables will probably be sufficient. If you’re on a 1000BASE-T network, you can go either way, providing you use the best quality cable & ends. If speed is of the essence, CAT6a cables are on top of your list.

Other considerations will include the layout of your equipment, the design of your home or office, and structures within your building. Confusing yes? Well that’s where the services of a data cabling engineer will come in. If you need one in Central/Greater London or the surrounding Home Counties, I’m just a ring away.

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Why Do I Need Data Cabling Validation?

Data cabling validation is a service we offer for homes and small businesses running CAT5e and CAT6 computer networks. It ensures that networks are running at maximum performance from the setup of the cable connections. Maybe it doesn’t require professional help to connect computers together to a data network. But it will require IT professionals, including a data cabling engineer to make sure that the network is running efficiently and smoothly.

The right connection

Data networks like Ethernet are not connected with plain old copper wiring. Data cables consist of 4 pairs of twisted copper wires. Depending on the way the copper wires are twisted and the coverings of the wires, different categories of cables transmit data at different frequencies. Generally, the higher the frequency, the faster the data transmission speed. High transmission speeds are important if you want to be able to transmit lots of data. For example, if you’re handling large amounts of data, sending voice, or even video across your network, CAT6 is the way forward.

Data cables are also checked for other characteristics. Electrical signals tend to get weaker as they travel through the cable and bleed out from the twisted wire pairs. This is called crosstalk and leads to slower data transmission. They are also influenced by electromagnetic interference (EMI), that comes from external electrical wiring and electronic devices, including the data devices that the cables are connected to. Depending on your network’s requirements for transmission speed, the way your cables are laid out, and the devices that you use, different categories of cables will produce different results.

Does your network cut the mustard?

Unless you’re an IT professional yourself, you might not be fully familiar with how your data network runs. Sure, your Ethernet network could be up and running now, but is it working as efficiently as it can? Are you getting your data in and out as fast as your network should provide?

Or maybe you’ve already noticed that your network or your computers are running more slowly after you moved some equipment around. Maybe you upgraded your connections but you aren’t getting the promised data speeds. You might be thinking, “Are my computers on the blink? Am I getting the performance I have paid for?”

Time for the professionals

Attenuation, or the slowdown of data speed, can result from incorrect cables and improper placement of cables. Maybe the source of your data transmission problems isn’t your computers or devices, but your cable connections. But you’d never know if you don’t know the first thing about data cabling. That’s where professional data cable validation comes in.

A data cabling engineer can come in with specialist equipment and check if you are using the correct category of cable for the speed of your network. He can check the layout of your cables within your home or office in the proper way to ensure proper functioning. He can also connect all your devices properly and test your network to make sure that everything is running at top speed.

Before you change your equipment, have your data cables validated first. Within the Central/Greater London, Hertfordshire, Bedfordshire and Milton Keynes areas, call us for a free site survey. You will receive a detailed proposal, showing how effective improvements can be achieved, recommendations and associated costs.

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26 Jan 2009

HP Printer Troubleshooting Steps

As with any kind of modern equipment, your Hewlett-Packard (HP) printer can “go for a burton” when you least expect it. Being a piece of technology, smacking it with your fist probably won’t fix it. If your print jobs aren’t turning out as you expected them to, or if they aren’t turning out at all, you can do some first aid measures to try and rescue your precious documents and your printer.

First things first


Make sure that your HP printer is plugged in, turned on, and properly connected to your computer. Make sure that you have already installed the correct device driver for your printer model appropriate for the operating system that you’re using. You did remember to put paper in the input bin, right?

Paper jams

Paper jams are the most common printer problem. HP printers are not immune to the problems caused by incorrectly placed paper or the wrong type of paper used. First of all, make sure that the paper that you are using follows the correct specifications on the recommended paper quality that can be used by your specific HP printer model. Check your manual for these specifications. Make sure that your printer is adjusted to receive the correct size of paper.

If your paper is slightly thicker but still meets the specifications, you can try to manually feed the paper into the printer. If this doesn’t work, shift to using a lighter weight of paper.

If you’re feeling really confident, find yourself a torch and look inside your printer for any obvious obstructions or signs of wear. Generally, the cause of the paper jam is near the front of the first sheet of paper stuck inside the printer.



Multiple feeds


Another common problem is multiple feeding of paper from the feeder tray. This is when more than one sheet of paper enters the printer at a time. This is also a cause of paper jams. This can be a result of the build-up of paper debris or particles on the pick-up roller. Clean it with a lint-free dry cloth and compressed air if you have it.

Once again, try flipping over your papers backward or top to bottom then reinserting them in the input bin. Don’t fan the stack of papers as this causes static build-up, which makes the sheets stick to each other. Bend the stack into a U-shape instead to separate the sheets.

Do not overfill the input bin. Fill it with a moderate amount of paper. Make sure that all the sheets are aligned before you put them back into the tray. Always realign sheets, especially when you are adding to an existing stack.

Finally, you can try changing the ream or the paper type you are using. It is not advisable to mix paper types in the input stack.

When all else fails

You’ve done everything and your printer is still acting up? Don’t get physical with it just yet. You can contact us for fast HP printer repair services with no call-out charge. And if we can’t fix your printer, we won’t charge you anything at all.

Our professional HP printer repair team is just a phone call away. Most faults cab be diagnosed over the phone and an accurate repair cost quoted. If the printer is “beyond economical repair” – we’ll tell you.

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HP Printer FAQs

Hewlett-Packard (HP) produces some of the most reliable and most popular printers in the world today. If you chose HP as your printer brand, rest assured that you will not regret it. Of course, like any other modern electronic advice, correctly using and maintaining an HP printer requires some know-how.

If you’ve just recently purchased your HP printer, then reading through some frequently asked questions can reduce the amount of time you’ll need to acquaint yourself with your new equipment.

Which operating systems can work with an HP printer?

Software drivers for all HP printers are available for the most popular operating systems in use today: Windows XP, Windows Vista, Mac OS X, and the various distribution forms of Linux. Your HP printer can operate with nearly every computer out there in the world today. It can even operate with older operating systems like Windows 95 or 98, as you can still download the software drivers for some HP printers for these operating systems.

How fast can HP printers print out pages?

Depending on the operating system of your computer, the type of printer you have (inkjet or laser), the content of the page your are printing (colour or monochrome), and the model of HP printer you have, printing output can range anywhere from 4 pages per minute for the older and more basic models to as fast as 50 pages per minute for the higher-end business LaserJets. Higher-end Colour LaserJets can print out colour pages as fast as 21 pages per minute.

What types and forms of paper can you use in HP printers?


HP printers in general can print on any plain paper as well as some other kinds of special paper like glossy, cardstock, and even recycled paper, depending on the specific characteristics and quality of the paper and your printer model. The manufacturer also recommends using HP-branded paper products to ensure complete compatibility with its printers.

Most HP printers can also print on the most common sizes of paper used in the home and office. All HP printers have adjustable feed trays that allow you to adjust the size of paper to be put in.

Refer to your specific model’s manual to see which types and sizes of paper your printer can accept. If you want quality prints produced effectively, it is advised that you follow the recommendations given by the manufacturer.

What are the most common problems encountered with HP printers?


Problems fall into two main categories:

  1. Paper jams:
    As with all printers, HP printers can also be victim to paper jams. This can be the result of using the wrong type of paper, incorrectly printing the wrong size paper, or poor maintenance of the printer in general (worn rollers etc). Follow your manual's instructions carefully to learn how to use and maintain your HP printer properly.
  2. Print quality defects:
Defective toners can cause toner leakage. A regular service should eliminate this problem. Don’t wait for a minor issue to become a major catastrophe!

However, if you are encountering chronic problems with your HP printer, then it is best to get reliable and fast HP printer repair services. You can contact us within the Greater and Central London, Hertfordshire, Bedfordshire, and Milton Keynes areas for a free call-out, with a no-fix, no-fee guarantee.

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Find an HP Printer Repair Specialist in the UK

Hewlett-Packard (HP) makes some of the most reliable and popular printers in the world. HP printers are available in a range of models suited for home or office use, or both. They excel in various types of print jobs ranging from plain text documents, to coloured brochures, to photo-quality prints. Your purchase of an HP printer will definitely prove worth it. So what do you do when your essential office equipment is on the blink?

DIY troubleshooting

Sometimes, printer problems are not caused by faulty equipment but by improper use. Always make sure to read the manual before you use your HP printer. Follow the instructions for connecting them to your computer and installing your software drivers for the operating system that you use. Also make sure that you use the correct type and size of paper for your specific model of HP printer.

Usually, when your print job does not go as planned, your computer will let you know what the problem is. If your ink or toner levels are low, you should receive a prompt from the print software telling you so. Only use original HP cartridges and toners when you have to replace them, to avoid potential toner leakages.

Other error messages will use specific codes, which should be specified in your manual. Some of these errors you will not be able to correct on your own. Don’t even try to attempt these; leave these problems to an HP printer repair specialist.

Other problems that you can troubleshoot are paper jams and multiple paper feeds. Changing the paper type that you use or just simply flipping over your stack of paper in the input bin can fix these problems. Regular maintenance of your HP printer can also help avert these problems. Look through our HP printer troubleshooting guide for more specific tips. Bear in mind, even normal usage, can result in wear and tear of the pickup / feed rollers. These can be easily replaced and are not expensive.

Time to call the professionals

There will come a time when a problem comes along that you can’t or shouldn’t tackle on your own. Ordinarily normal printer problems that become persistent may mean that something is wrong, not with your paper but with your HP printer. Some error codes signify internal problems that ordinary users should not attempt to fix on their own. That’s when it’s time to look for an HP printer repair specialist. If you don’t have an HP service centre in your area, then look for someone who can provide fast HP repair services at your home or office.

Within the Greater and Central London, Hertfordshire, Bedfordshire, and Milton Keynes areas, we can provide reliable HP printer repairs with a no-fix, no-fee guarantee. Not only that, we are your one-stop shop for your HP printer needs. We also sell genuine HP accessories like HP toner, rollers and fuser units. We can also service other equipment like HP colour laser copiers.

There’s no need to hesitate to call for our HP printer repair specialist, as we offer free site servicing. Absolutely no call-out charges! Don’t leave your valuable HP printer in novice hands; call for real HP printer repair specialists.

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Find a Structured Cabling Engineer in the UK

If you live in the areas of Central and Greater London, Watford, Luton, Stevenage, Bedford or Milton Keynes, finding a structured cabling engineer should not be a difficult task. Running a business is a lot of work as it is. You don’t have to install and maintain an IT data communication system for your business on your own. Of course, you’d want someone nearby who will always be available and be near at hand when you need the help. Data cabling is definitely something you’re better off leaving to professionals.

Starting the right way

If you’re just about to install a computer network, a structured cabling engineer will be your go-to guy. A cabling engineer will know what equipment you need for an effective and efficient data network system. Most especially, he will know what type of connections you will need to run your network at a transmission speed suited for the data you use and for your other work needs.

Remember that it is important to choose the right cable category depending on the speed of your Ethernet connection, as well as the data type that is to be sent over the cables. If your need is shared data, printer sharing and shared internet access, then CAT5e will be sufficient. The newer, faster networks running fast response applications such as database, video or even running high definition TV, CAT6 is the way to go. Super fast networks that run up to 10 Gbits/s will require the latest CAT6a or fibre optic cabling. Your cabling engineer should be able to help you make informed choices depending on your budget and needs, in the form of a detailed proposal, stating all costs and justifying choices and recommendations made.

Do things the right way

Finding a cabling engineer from your area also means that he will be familiar with local building codes. He’ll know how to install cables within your premises without violating building codes. He will also know how to lay out your equipment and your cables so that your network runs efficiently and does not look like a cluttered, tangled mess of cables and devices.

Data cables are made to standards that ensure fast and accurate data transmission. Any mishandling of the cables during their layout and placement will create problems for your network. A cabling engineer can ensure that everything is laid out properly and can test your network when it is set up to make sure everything is running as it should.

Keeping things going

Finally, after-service support will always be prompt and available if your cabling engineer is from within your area. Outsourcing your network maintenance problems will decrease the problems that you have to deal with on your own. Getting professional help can also help you reduce your expenses due to unnecessary repairs.

J. Barton, one of our satisfied customers, contacted us to inform us that they’d been able to save almost 2000 GBP on unnecessary computer upgrades. They had initially thought their slower networks were due to their three year-old fileservers. After a free site survey by one of our cabling engineers accompanied by a van load of test equipment, they saw that the problem was linked to some new electrical wiring, which was causing interference with his data cables.

Local professional help within Central and Greater London and the surrounding Home Counties is just a phone call away. Let our IT professionals handle your networking needs.

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What Is Data Cabling Verification?

Data cabling verification is done to ensure that manufactured data cables are able to meet the required international and industry standards. Data cables are typically made of 4 twisted pairs of copper wires. The characteristics of the cable include the size of the wires, how they are twisted, their casings, and several other manufacturing characteristics. These characteristics then combine to give the cable its performance with regard to data transmission.

Speed ratings

Depending on the performance of a data cable, it is categorized by industry standards set by the Telecommunications Industry Association (TIA). The characteristics and performance of a data cable are measured in several parameters, set forth in the TIA Standard 568-B.2-10.

One of the most important parameters is the frequency with which the cable is able to transmit data. In general, the higher the frequency of the carrier signal in the cable, the greater the amount of data that can be sent through the cable in a shorter amount of time.

For example, Category 5e (CAT5e) cables are rated to carry signals up to 250 MHz. This allows CAT5e cables to carry data at speeds of up to 1 Gbit/s. The newer Category 6a (CAT6a) cables, on the other hand, can carry signals at 550 MHz. This allows for data transmission speeds of up to 10 Gbit/s. Using the best quality cable and connectors, maximises your ability to achieve the fastest levels of performance.

Signal noise and slower data


Data cables do not just have to follow standards for data transmission speed. They also have to follow performance specifications for the loss of electrical signals from the wires. This “bleeding” of electrical signal strength from the twisted wire pairs is called crosstalk. The newer CAT6 and CAT6a cables have more stringent requirements for the amount of signal noise produced by crosstalk, both at the origin and at the destination of the data packets. These parameters also have to be verified before a manufactured cable is marked as meeting CAT6/6a cable standards.

Signal loss also occurs simply because of the physical properties of copper wire. Most data cables carry copper wiring that has a maximum impedance of 100 ohm. However, the process of creating the twisting pairs within the data cable and the actual length of the cable, among other things, contribute to inevitable weakening of the data signal. This is called attenuation.

Once again, the newer CAT6 and CAT6a cables have stricter criteria for attenuation. Higher signal frequencies mean more data travelling through the cable. Thus it is more important that less attenuation occurs with these cables given the volume of data they are supposed to carry.

What are you using?


Data cables should be verified by the time they get to you. The markings indicating their verification for performance and safety should be printed on the outer insulation of the cable. If you aren’t up to par with your technical know-how, then the professional help of a cabling engineer or technician will be invaluable to you. Call us for a free site survey and we can tell you if you’re running the right kind cables in your network and the maximum amount of data that your cables can carry (using validation equipment).

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FAQs on Data Cabling Dos and Donts

Data cables for your Ethernet network are made with very strict specifications to allow fast data transmission speeds with minimal signal loss or attenuation. The use of incorrect cables will reduce the efficiency and the speed of the network. Attenuation also increases when cables are improperly manipulated and placed within the premises.

If you are going to attempt to install data cabling within your home or office it is important that you know how cables should be correctly installed. This information should also prove useful if you are supervising some hired cabling engineers and need to check if they are doing it correctly.

Intact cables = Intact data

We want to make sure that when we link two devices together, the data that is transmitted from one device to another is kept intact and transmitted rapidly. Attenuation can result from crosstalk, which is the bleeding of electrical signals from the twisted wire pairs. It can also result from electromagnetic interference coming from other electrical wiring or devices. It is important that the cables’ physical characteristics are not altered. This will keep the cables intact longer and reduce signal noise and alteration.

Cable layout considerations

  • DO remember that the most efficient cabling layout for your network is the Star Configuration. All devices should essentially be connected to one central hub. This ensures that if one link goes down, it does not bring down all the other links.
  • DON’T over extend your cables beyond 330ft (100m) between links. If you’re running a cable around your home or office premises, remember that you will have to leave a length of patch cable. Ideally, patch cords are kept at 30ft (8m), so your cable runs should have a maximum length of 300ft (92m).
  • DON’T over-bend your cables. Data cables have a rated minimum bending capacity, which is 4 times the diameter of the cable, or a 1-inch radius gradual bend. More bend than that and the wire will kink and slow down data signals.
  • DO make sure that when you’ve laid out the cables, there are no kinks or crimps from neighbouring structures. These will also cause data slowdown.
  • DON’T tie your cables to existing electrical wiring. Electro magnetic interference (EMI) from the other wiring will cause attenuation of the data signal.
  • DO use appropriate cable supports.


Proper Cable Handling


  • DON’T crimp cables with over-tight staples or plastic ties for attaching them to walls or ceilings.
  • DO use insulated staples and Velcro straps.
  • DON’T pull on cables with too much force or keep them too taut when you lay them out.
  • DO use appropriate cable lubricant if you have to pull them through structures.
  • DO use appropriate connectors for your wiring scheme (568A or 568B). Neither has an advantage over the other.
  • DON’T mix wiring schemes on the same installation.
  • DO keep the wires twisted as close as possible to the termination point.
  • DON’T skin more than 1 inch off the termination point of the cable.

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