Category 5 cable , commonly referred to as CatÃ, 5 , is a twisted pair cable for computer networks. Standard cabling provides performance up to 100 MHz and is suitable for most Ethernet varieties through bent pairs. Cat 5 is also used to carry other signals such as phone and video.
These cables are generally connected using punch-down blocks and modular connectors. Most Category 5 cables are not in-hold, relying on the design of balanced twisted pair lines and differential signals for noise rejection.
Category 5 specs were abandoned in 2001 and replaced by the category 5e specification.
Video Category 5 cable
Standar kabel
The specifications for the 5 cable category are defined in ANSI/TIA/EIA-568-A, with clarification on TSB-95. These documents specify performance characteristics and test requirements for frequencies up to 100 MHz.
Cables are available in solid and serrated conductors. The displaced form is more flexible and more flexible resistant without breaking. Stranded patch cable. The permanent cable used in structured cabling is a solid core. Categories and types of cables can be identified by printing on a jacket.
Maps Category 5 cable
Termination
The cable type, connector type and cable topology are determined by TIA/EIA-568-B. Almost always, 8P8C modular connectors (often referred to as RJ45 connectors) are used to connect category 5 cables. Cables terminated either in the T568A scheme or T568B scheme. Both schemes work well and can be mixed in the installation as long as the same scheme is used on both ends of each cable.
Variant and comparison
The 5e category specification enhances the category 5 specification by revising and introducing new specifications to further reduce the number of crosstalk. Bandwidth (100 MHz) and physical construction are the same between the two, and most Cat 5 cables actually meet Cat 5e specifications, although they are not specifically certified as such. Category 5 was not used in 2001 and was replaced by category 5e specification.
Category 6 specifications improve category 5e specifications by increasing frequency response and reducing crosstalk. Cat 6 performance improvements provide bandwidth of 250 MHz and support 10GBASE-T (10-Gigabit Ethernet) for distances up to 55 meters. Category 6A Cable provides 500 MHz bandwidth and supports 10GBASE-T for distances up to 100 meters. Both variants are compatible with category 5 and 5e cables.
Apps
Category 5 cables are used in structured cabling for computer networks such as Ethernet over twisted pair. Standard cabling provides performance up to 100 MHz and is suitable for 10BASE-T , 100BASE-TX (Fast Ethernet), and 1000BASE-T (Gigabit Ethernet). 10BASE-T and 100BASE-TX Ethernet connections require two pairs of wires. The 1000BASE-T Ethernet connection requires four pairs of wires. Through the use of power over Ethernet (PoE), power can be carried over the cable in addition to Ethernet data.
Cat 5 is also used to carry other signals such as phone and video. In some cases, multiple signals can be carried on one cable; CatÃ, 5 can carry two conventional phone lines as well as 100BASE-TX in one cable. The USOC/RJ-61 cable standard can be used in multi-line telephone connections. Various schemes exist for transporting analog and digital video via cable. HDBaseT (10.2 Gbit/s) is one such scheme.
Characteristics
The use of balanced lines helps maintain a high signal-to-noise ratio despite interference from both external sources and crosstalk from other couples.
Isolation
Outstanding isolation is polyvinyl chloride (PVC) or low smoke zero halogen (LSOH).
Bending radius
Most Category 5 cables can be bent at any radius that exceeds about four times the outside diameter of the cable.
Maximum cable segment length
The maximum length for the cable segment is 100m per TIA/EIA 568-5-A. If it takes longer, use of active hardware such as repeaters or switches is required. The specifications for the 10BASE-T network determine the length of 100 meters between active devices. This allows for 90 meters permanent core permanent cable, two connectors and two jagged patch cables of 5 meters, one at each end.
Conductor
Since 1995, UTP cable for solid conductor backbone cables required no thicker than 22 American Wire Gauge (AWG) and no thinner than 24 AWG, or 26 AWG for short-range cable. This standard has been maintained with the 2009 ANSI TIA/EIA 568 revision.
Although cable assemblies containing 4 pairs are common, category 5 is not limited to 4 pairs. Backbone applications involve the use of up to 100 pairs .
Individual length of play
Distance per twist is usually referred to as pitch. Each of the four pairs in the Catà 5 cable has a different pitch to minimize crosstalk between pairs. The pitch of the twisted pair is not specified in the standard. Measurements on one sample of Cat® 5 cables produced the following results.
Since pitch of various colors is not specified in the standard, the pitch may vary according to the manufacturer and should be measured for the batch used if the cable is used in a non-Ethernet situation where pitch may be important.
Environmental rating
Some cables are "UV-rated" or "UV-stable" which means they can be exposed to outdoor UV radiation without significant damage.
The plastered cables are slower to burn and produce less smoke than wires using material coats like PVC. Plenum-plated cables can be installed in plenum spaces where PVC is not allowed.
Shielded cables (FTP or STP) are useful for environments where proximity to RF equipment can introduce electromagnetic interference, and can also be used where possible eavesdropping should be minimized.
References
Source of the article : Wikipedia
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