In its simplest form, twisted-pair cable consists of two insulated strands of copper wire twisted around each other. There are two types of twisted-pair cable: unshielded twisted-pair (UTP) and shielded twisted-pair (STP) cable. A number of twisted-pair wires are often grouped together and enclosed in a protective sheath to form a cable. The total number of pairs in a cable varies. The twisting cancels out electrical noise from adjacent pairs and from other sources such as motors, relays, and transformers.
Category 5e or Category 6
Currently there is a great deal of confusion among Ethernet cable buyers concerning whether to purchase Cat5e, or to use Cat6. Most of this confusion comes from a misunderstanding by the buyer that buying Cat6 cable will give them an “all gigabit” network. This is not the case. Unless every single component in the network is gigabit rated, then you will never have a gigabit network, because your network will always run at the speed of your slowest device.
Cat5e cable of good quality can run near or at gigabit speeds, it just cannot be “certified” for this use. By comparison, Cat6 is designed especially for gigabit use, and is certified to operate at said speed. It becomes a matter of whether or not you want to pay all that extra money, for little or no noticeable improvement in the performance of you network.
In most cases, it makes more sense to go with Cat5e. It is for this reason that most of your new installations in the private sector are going with Cat5e. It is more economical, performs well, and is readily available in many colors. Many IT professionals when asked about why they specified Cat6 for a specific job, often responded stated that they “wanted the best they could get.” This is the line of thought behind many purchases of cable.
The average consumer often times is not aware that there is no real benefit to them to use Cat6, so they let someone talk them in to buying it. Fiberstore is committed to helping people make good decisions about cable purchases and we are always standing by to help you.
How to Buy Twisted Pair Cable
Following are some advice you can take when choose a twisted pair cable for your network.
See Packing and Printing Quality
Carefully check the cable box to see whether packing is in good conditions. The packaging of fake cable is usually very poor, so the quality of the external packaging can determine the user’s first feeling. However, good quality cables are usually perfectly packaged. And many manufacturers still paste anti-fake label on the product packaging.
See Identifications on Cable’s Outer Layer
Twisted pair cable insulation outer layer shall be printed with the words such as manufacturers, place of origin, performance standards, product categories (Cat5e Ca6t, etc.) and cable length identification.
See Twisting Density
In order to reduce signal interference, each line pairs of the twisted pair cable are twisted in a counterclockwise direction to each other and the different line pairs of the same twisted pair cable also has different twisting density. If the twisting density does not meet the technical requirements, serious near-end crosstalk may appear due to the mismatch of the cable resistance, which will shorten transmission distance and reduce the transmission rate. Don’t choose twisted pair cables whose twisting density is incompetent.
See Cable Colors
After peeling the outer layer of twisted pair cable, you can see each pair of wires in a twisted-pair cable is one of four colors: orange, green, blue, or brown. The two wires that make up each pair are complementary. It should be noted that these colors are not dyed on the cable. Don’t choose cables whose color is not clear.
See Flame Retardants Cases
In order to avoid cable’s burning and damage caused by high temperature or fire, the outer layer of the twisted pair cable should have a very good tensile property and flame retardant property. The outer layer of a good twisted pair cable may be gradually melted and misshapen, but won’t burn itself.
Touch the Cable’s Outer Layer
In most cases, we can make an initial judgment by touching the outer layer of twisted pair cable. In order to save cost, bad cable usually uses terrible wire materials. So when we touch it, we may feel sticky and coarsened. However, a good twisted pair cable may feel smooth. Besides, considering that the cable may need to be curved, good cables usually have excellent extensibility. Therefore, good cables may feel full.
Taking the future applications into consideration, we should install the most advanced cabling products, because the cable is often difficult to re-install and replace. Then, you should use cat6 cables instead of cat 5e cable. Though cat 6 cable is a little expensive than cat 5e cable, in order to reduce cost for network upgrade in the future, cat 6 cables are still worth considering.