On cable, you know how much?

Network transmission medium having a coaxial cable, cable, fiber optic three. Wherein the cable as an important carrier signal transmission network is determined by two copper conductors having an insulating protective layer thereof. The two insulated copper wires twisted by a certain density to each other, each of the conductors in the transmission of radiated radio waves are emitted offset by the other lines, reduce the degree of signal interference, also known as bis twisted (Twisted pair, TP) .
On cable, you know how much?
UTP cable CAT5E
UTP cable is living in the most common type of cable, the wiring is simple, the price relative to other cable, it will be much cheaper, transfer rates up to 100Mbps, durable not dropped.
On cable, you know how much?
International Network for the oxygen-free copper wire material Copper or copper core diameter 0.51MM, Fast stable support network. Since the resistance value of the oxygen-free copper and the other is minimal compared, the resistance is about hundred meters 9.5Ω, a small resistance value, the transmission rate will be relatively high, the use life is relatively long, generally we choose household net line, directed at an affordable, you can select the type of network cable.

Six cable CAT6

Six cable is an upgraded version of the UTP cable, and high transmission efficiency, compared with the parameters of UTP has been a very substantial increase.
1000Mbps transfer rates, compared to the five lines of the intermediate cross frame increases the insulating isolation effect is more better, and more coarse diameter of the cable.
On cable, you know how much?
Copper wire diameter 0.58mm, high thickening conductor leads, shrapnel thick copper, gold plated contacts, crystal clear good toughness, PE and PVC outer are to be made, not only wear bending, but also enhance the wire core life. Try network transmission has high requirements of such cable, and the output speed of such cable is also stable.

Super six cable CAT6E

超六类网线是六类网线的升级版,因此又被称为“增强型六类网线”,在外部串扰等方面的性能比六类网线更好。与六类网线相比,超六类网线的外径更大、质量更重、最小弯曲半径也更大,超六类线缆在-20~60°C的高性能布线系统中仍可正常运行,在传输速率为10Gbps时,传输距离可达到100m,同时它可向下兼容以前所有的类别。
On cable, you know how much?
七类网线CAT7

七类网线,采用无氧铜作为线芯,传输频率至少可达600 MHz在传输速率上可达10Gbps,且性能优异。
On cable, you know how much?
纯铜线芯,八芯七股,稳定传输万兆网络信号。

信号零衰减、高速率、高传输,性能强劲、稳定、无障碍网络传输,更快更稳更安全更环保。

性能相比于超五类、六类、来说有了很大的提升,但布线施工时略微复杂。

根据信号屏蔽性能分为:

屏蔽网线主要是针对有强干扰的环境,有干扰的环境会造成网线传输信号断续,甚至中断,无法正常传输信号。而使用屏蔽网线能很好的抵抗干扰,保持传输正常,且有良好的保密性能,屏蔽布线的屏蔽结构对减低线缆间的相互干扰有先天优势,不仅可以屏蔽外界的电磁信号,铝箔也同时阻断了线缆本身的电磁泄露,不会发射干扰信号影响其他线缆的工作,可以防止信息被窃听。

UTP:Unshielded Twisted Pair即非屏蔽双绞线,用于传输带宽在250MHz以下,没有特殊性能要求的普通网络应用,无屏蔽外套、直径小、重量轻,易弯曲,易于施工和维护、价格便宜。但此类型的性能最高极限仅支持六类网线的布线系统。
On cable, you know how much?
STP:Shielded twisted pair 即独立屏蔽双绞线,在芯线外增加铝箔层,每对线都有一个铝箔屏蔽层,目的在于减少信号的衰减。每4对线合包还有一个金属编织屏蔽层,这已经达到七类网线的结构标准。适用于高速网络和高保密性传输,可支撑未来应用更新,可以统一布线平台,多种媒体信息共同传输。
On cable, you know how much?
FTP:Foiled Twisted Pair即铝箔屏蔽的双绞线,其具有使用带宽较大、有一定抗干扰能力、减少信号衰减,回收低烟无卤、环保的优点。
On cable, you know how much?
SFTP:Shielded Foiled Twisted Pair即双屏蔽双绞线,在STP的铝箔基础上增加编织网,通常用铝镁丝编织网、镀锡铜网,外层是PVC外被,总体说则是有两层屏蔽层、且两层屏蔽层之间必须有绝缘隔离。它的优势在于有效减少环境磁场、信号干扰,内部信号衰减程度低。缺点是柔软性差且昂贵,这种具抗干扰及高度保密传输的线材,适用特殊环境的专业布线工程中。
On cable, you know how much?
ASTP:Armored Shielded Twisted Pair即铠装型双绞屏蔽网线(电缆)则是较为特殊的双屏蔽网线,在以上双屏蔽线的基础上,外层为钢带铠装层,使用时,钢带铠装层两端接地,最内层屏蔽一端接地。具有双屏蔽线的效果外,强度较高,可用于鼠害频繁或有防爆要求的布线系统,一般屏蔽线比非屏蔽线在成本和安装上都会贵一些,弯曲性能稍差。但适用于一些特殊环境和屏敝系统综合布线。大家可以在了解自身情况后合理选择,优化成本及布线效果。
On cable, you know how much?
根据导线股数可分为:

单股铜线:单股铜线由于其结构原因,相应的比较多股导线的硬度高一些,主要作为工程布线,网线信号属于是高频电流,只在导体的表面流动(趋肤效应),一般用于固定敷设(比如穿管线路等)。单股铜线比较多股铜线而言,它在线路接头、设备接线方面要方便些,多股铜线一般需要压接或焊接线鼻子等。但多股铜线比单股铜线价格高一些。
On cable, you know how much?
多股铜线:多股铜线是细导体丝,韧性好,不会因为反复弯曲导致导体折断,多股导线多用于控制线路。它适用于导线要跟随运动的场合(比如一般的配电箱、柜的门上),多根导线敷设在一起的场合(便于导线敷设和导线束成型)。而多股铜芯使得通过的电流流动路径不规则,波动到,反而会导致电磁干扰,影响传输信号的质量。
On cable, you know how much?
网线甄选:

用手感觉:优质的网线一般使用铜线做导线芯,比较软,劣质导线添加了其它的金属元素,比较硬,不易弯曲,使用中容易断线。

用刀割:去掉塑料外皮露出芯线,白色芯线是花白的,假货通常是纯白色或花色不明显,好的网线绕线密度适中,方向是逆时针。

用火烧:用高温测试,正品网线外面的胶皮不会变软,正品网线外面的胶具有阻燃性,而假的有些则不具有阻燃性,不符合安全标准。,铁的硬度很高,用火烧不会很快软掉。

网线标准制作线序分三种:T568A、T568B和第三种

T568A线序为:白绿 绿 白橙 蓝 白蓝 橙 白棕 棕

T568B线序为:白橙 橙 白绿 蓝 白蓝 绿 白棕 棕

第三种线序为:白绿 绿 白橙 白棕 棕 橙 蓝 白蓝
On cable, you know how much?
网线有4对双绞线,百兆带宽用1、2,3、6这四条就可以传输信号,其中1、2作为数据的发送端,3、6作为数据的接收端,所以做网线时只要确保1、2一组,3、6一组是同种颜色线序就可以连通了。千兆以太网络通常八芯全用,比如六类超六类的网线不光要用1 3 2 6 ,八芯都需要用到,否则网络运行就会不稳定。
On cable, you know how much?
网线的应用

以太网连通方式主要有两种:直通线缆和交叉线缆。
On cable, you know how much?
On cable, you know how much?
直通线缆用于连接计算机与交换机、HUB(集线器)等
On cable, you know how much?
两端水晶头都遵循T56A或T568B标准,通常使用T568B更多。以太网百兆网线和千兆网线的直通线缆连接方式相同。

交叉线缆用于连接计算机与计算机、交换机与交换机等。
On cable, you know how much?
百兆交叉线缆两端水晶头一个采用T568B,另一个采用T568A,即1-3,2-6,3-1,4-4,5-5,6-2,7-7,8-8。由于千兆网络8根线都有用到,因此交叉线缆连接方式与百兆网线有些不同,千兆网络交叉线缆两端水晶头一个采用T568B,另一个采用第三种排法,即1-3、2-6、3-1、4-7、5-8、6-2、7-4、8-5。

If the application needs to consider the future of the network, in theory, should install the most advanced cabling products, since it is often difficult to re-install the update replaces the cable, basically, a wiring system to be applied at least 10 years as standard, can support 4-5 generations of network equipment performance update, if in the future the need for better cable network equipment in order to increase the data rate.

We can choose a reasonable understanding of their situation, optimize costs and wiring effect.

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Origin blog.51cto.com/14408894/2422643
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