<p><font size="3"><font color="#c60a00">CAT.5 Cable system ?</font></font></p>
时间: 2007-8-22 07:11
作者: 喂喂拷
CAT.5 UPT Cable system
时间: 2007-8-22 11:45
作者: 佛祖心中留
时间: 2008-3-4 13:25
作者: 無智
Category 5 Cable(5类线)
时间: 2008-3-4 14:18
作者: 柴可夫司机
<p><font color="#000000" size="1">5类双绞线（英文: Category 5 cable），一般称为CAT-5线，是一种双绞线(<u>Twist-Pair</u>)，并设计为可提供高速度、低噪讯比的讯号传输线。</font></p><p>Category 5</p><p> CAT 5. A Category of Performance for inside wire and cable systems. CAT 5 cables can be of various gauges, and are useful in support of applications requiring a carrier frequency of up to 100 MHz; the transmission rate achievable depends on the compression scheme employed. Example applications include 4/16 Mbps Token Ring, 10/100Base-T, 100VG-AnyLAN, and even 155 Mbps ATM LANs. CAT 5 is now the most common cabling being installed for LAN connectivity. Increasingly, CAT 5 cabling is being installed for both data and voice use, and is the cabling of choice for forward-looking companies. Category 5 technical specifications are defined by FCC Part 68, EIA/TIA-568, TIA TSB-36, TIA TSB-40, and ANSI/ICEA S-91-661. See also Category of Performance.</p><p>Category 5e</p><p> See Category 5 Enhanced.</p><p>Category 5 Enhanced</p><p> CAT 5e. CAT 5e has become the de facto minimum standard for cabling. It supports signaling rates of up to 100 MHz over distances of up to 100 meters. Specifications call for a tighter twist, electrical balancing between pairs, and fewer cable anomalies, such as inconsistencies in the core diameter. CAT 5e supports 100Base- T, ATM, and Gigabit Ethernet, which is 100 million bits per second. By way of comparison, category 3 cable is rated for any application up to 16 Mhz (Frequency) while category 5e is rated for up to 100 Mhz (Frequency) Computer networks and phone systems all operate at one or another frequency. Category 5e will accomodate both analog phones as well as any computer protocol such as Gigabit Ethernet. See also Category of Performance.</p><p>Category 6</p><p> CAT 6. Proposed Category 6 standards from the TIA (Telecommunications Industry Association), known as Class E standards at the ISO (International Organization for Standardization), describe a new performance range for unshielded and screened twisted-paid cabling. Category 6/Class E is intended to specify the best performance that UTP and ScTP cabling solutions can be designed to deliver based on current technology. Category 6e will be specified in the frequency range of 1-250 MHz. The cabling system actually will be rated at 200 MHz in consideration of positive PSACR (Power Sum Attenuation-to-Crosstalk Ratio, also known as PS-ACR), although equipment crosstalk cancellation capabilities will allow the system to be characterized to 250 MHz. The ScTP version of CAT 6 comprises four twisted pairs of 100 Ohm wire, with the entire cable being protected from ambient noise by means of a metallic screen. Most CAT 6 cables have a center filler that separates each pair within the cable jacket. The interface at the workstation will be an 8-position modular jack. According to the Telecommunications Industry Association, "Category 6 cabling is the latest addition to the structured cabling standards and has twice the bandwidth of category 5e cabling. This improved bandwidth, together with vastly improved immunity from external noise, provides the potential for category 6 to support multi-gigabit applications. This white paper provides an update on category 6 cabling and applications standards together with references for finding category 6 information and products." See also Category of Performance and PS-ACR.</p>
时间: 2008-3-4 14:19
作者: 柴可夫司机
<p><font color="#000000" size="1">5类双绞线（英文: Category 5 cable），一般称为CAT-5线，是一种双绞线(<u>Twist-Pair</u>)，并设计为可提供高速度、低噪讯比的讯号传输线。</font></p><p>Category 5</p><p> CAT 5. A Category of Performance for inside wire and cable systems. CAT 5 cables can be of various gauges, and are useful in support of applications requiring a carrier frequency of up to 100 MHz; the transmission rate achievable depends on the compression scheme employed. Example applications include 4/16 Mbps Token Ring, 10/100Base-T, 100VG-AnyLAN, and even 155 Mbps ATM LANs. CAT 5 is now the most common cabling being installed for LAN connectivity. Increasingly, CAT 5 cabling is being installed for both data and voice use, and is the cabling of choice for forward-looking companies. Category 5 technical specifications are defined by FCC Part 68, EIA/TIA-568, TIA TSB-36, TIA TSB-40, and ANSI/ICEA S-91-661. See also Category of Performance.</p><p>Category 5e</p><p> See Category 5 Enhanced.</p><p>Category 5 Enhanced</p><p> CAT 5e. CAT 5e has become the de facto minimum standard for cabling. It supports signaling rates of up to 100 MHz over distances of up to 100 meters. Specifications call for a tighter twist, electrical balancing between pairs, and fewer cable anomalies, such as inconsistencies in the core diameter. CAT 5e supports 100Base- T, ATM, and Gigabit Ethernet, which is 100 million bits per second. By way of comparison, category 3 cable is rated for any application up to 16 Mhz (Frequency) while category 5e is rated for up to 100 Mhz (Frequency) Computer networks and phone systems all operate at one or another frequency. Category 5e will accomodate both analog phones as well as any computer protocol such as Gigabit Ethernet. See also Category of Performance.</p><p>Category 6</p><p> CAT 6. Proposed Category 6 standards from the TIA (Telecommunications Industry Association), known as Class E standards at the ISO (International Organization for Standardization), describe a new performance range for unshielded and screened twisted-paid cabling. Category 6/Class E is intended to specify the best performance that UTP and ScTP cabling solutions can be designed to deliver based on current technology. Category 6e will be specified in the frequency range of 1-250 MHz. The cabling system actually will be rated at 200 MHz in consideration of positive PSACR (Power Sum Attenuation-to-Crosstalk Ratio, also known as PS-ACR), although equipment crosstalk cancellation capabilities will allow the system to be characterized to 250 MHz. The ScTP version of CAT 6 comprises four twisted pairs of 100 Ohm wire, with the entire cable being protected from ambient noise by means of a metallic screen. Most CAT 6 cables have a center filler that separates each pair within the cable jacket. The interface at the workstation will be an 8-position modular jack. According to the Telecommunications Industry Association, "Category 6 cabling is the latest addition to the structured cabling standards and has twice the bandwidth of category 5e cabling. This improved bandwidth, together with vastly improved immunity from external noise, provides the potential for category 6 to support multi-gigabit applications. This white paper provides an update on category 6 cabling and applications standards together with references for finding category 6 information and products." See also Category of Performance and PS-ACR.</p>
时间: 2008-3-4 14:29
作者: 柴可夫司机
<p><font color="#000000" size="1">5类双绞线（英文: Category 5 cable），一般称为CAT-5线，是一种双绞线，并设计为可提供高速度、低噪讯比的讯号传输线。</font></p><p><font color="#000000" size="1">Category 5</font></p><p><font color="#000000" size="1"> CAT 5. A Category of Performance for inside wire and cable systems. CAT 5 cables can be of various gauges, and are useful in support of applications requiring a carrier frequency of up to 100 MHz; the transmission rate achievable depends on the compression scheme employed. Example applications include 4/16 Mbps Token Ring, 10/100Base-T, 100VG-AnyLAN, and even 155 Mbps ATM LANs. CAT 5 is now the most common cabling being installed for LAN connectivity. Increasingly, CAT 5 cabling is being installed for both data and voice use, and is the cabling of choice for forward-looking companies. Category 5 technical specifications are defined by FCC Part 68, EIA/TIA-568, TIA TSB-36, TIA TSB-40, and ANSI/ICEA S-91-661. See also Category of Performance.</font></p><p><font color="#000000" size="1">5 类</font></p><p><font color="#000000" size="1"> CAT 5。内部线缆系统中的一种性能种类。5 类线可以有22口径或24口径，可以支持载频最高为 100 MHz 的应用程序，其传输速率由所采用的压缩方案决定。使用5 类线的有 4/16 Mbps 令牌环 （802.3）、10/100Base-T、100VG-AnyLAN，甚至还有 155 Mbps ATM LANs。5 类线目前是局域网互联中使用最广泛的一种布线。5 类线越来越多的应用与数据和话音传输，是有远见的公司首选布线。FCC 第 68 章、EIA/TIA-568、TIA TSB-36、 TIA TSB-40 和 ANSI/ICEA S-91-661 定义了 5 类线技术规范。参见 Category of Performance。</font></p><p><font color="#000000" size="1">Category 5e</font></p><p><font color="#000000" size="1"> See Category 5 Enhanced.</font></p><p><font color="#000000" size="1">增强型 5 类线</font></p><p><font color="#000000" size="1"> 参见 Category 5 Enhanced。</font></p><p><font color="#000000" size="1">Category 5 Enhanced</font></p><p><font color="#000000" size="1"> CAT 5e. CAT 5e has become the de facto minimum standard for cabling. It supports signaling rates of up to 100 MHz over distances of up to 100 meters. Specifications call for a tighter twist, electrical balancing between pairs, and fewer cable anomalies, such as inconsistencies in the core diameter. CAT 5e supports 100Base- T, ATM, and Gigabit Ethernet, which is 100 million bits per second. By way of comparison, category 3 cable is rated for any application up to 16 Mhz (Frequency) while category 5e is rated for up to 100 Mhz (Frequency) Computer networks and phone systems all operate at one or another frequency. Category 5e will accomodate both analog phones as well as any computer protocol such as Gigabit Ethernet. See also Category of Performance.</font></p><p><font color="#000000" size="1">增强型 5 类线</font></p><p><font color="#000000" size="1"> CAT 5e。CAT 5e 已经成为约定成俗的最低布线标准。CAT 5e 支持最高为 100 MHz 信令传输速率，最大传输距离为 100 米。CAT 5e 的技术规范要求使用细双绞线、双绞线之间需达到电平衡并且电缆异常越来越少，比如线缆核心直径中的前后不一致。CAT 5e 支持 100Base- T、ATM 和 Gigabit 以太网，传输速率为 100Mbps。顺便比较一下，3 类线适用的最大传输速度为 16 Mhz（频率），而5 类线适用于完全运行于一个或另一个频率且最大传输速率为 100 Mhz（频率） 的计算机网络和电话系统。5 类线同时可以应用于模拟电话系统和所有计算机协议，比如说万兆网。参见 Category of Performance。</font></p><p><font color="#000000" size="1">Category 6</font></p><p><font color="#000000" size="1"> CAT 6. Proposed Category 6 standards from the TIA (Telecommunications Industry Association), known as Class E standards at the ISO (International Organization for Standardization), describe a new performance range for unshielded and screened twisted-paid cabling. Category 6/Class E is intended to specify the best performance that UTP and ScTP cabling solutions can be designed to deliver based on current technology. Category 6e will be specified in the frequency range of 1-250 MHz. The cabling system actually will be rated at 200 MHz in consideration of positive PSACR (Power Sum Attenuation-to-Crosstalk Ratio, also known as PS-ACR), although equipment crosstalk cancellation capabilities will allow the system to be characterized to 250 MHz. The ScTP version of CAT 6 comprises four twisted pairs of 100 Ohm wire, with the entire cable being protected from ambient noise by means of a metallic screen. Most CAT 6 cables have a center filler that separates each pair within the cable jacket. The interface at the workstation will be an 8-position modular jack. According to the Telecommunications Industry Association, "Category 6 cabling is the latest addition to the structured cabling standards and has twice the bandwidth of category 5e cabling. This improved bandwidth, together with vastly improved immunity from external noise, provides the potential for category 6 to support multi-gigabit applications. This white paper provides an update on category 6 cabling and applications standards together with references for finding category 6 information and products." See also Category of Performance and PS-ACR.</font></p><p><font color="#000000" size="1">6 类</font></p><p><font color="#000000" size="1"> CAT 6。TIA（电信行业协会）提议的 6 类线标准，ISO（国际标准化组织）称之为 Class E 标准，描述了非屏蔽和屏蔽双绞线的新的性能范围。CAT 6/ Class E 意图详细列出最佳性能，使得 UTP 和 ScTP 双绞线设计方案能够在目前技术基础上获得应用。增强型 6 类线适用的频率范围是 1-250 MHz。考虑到正的 PSACR（衷减—串音衰减比率，又称为 PS-ACR）因素，布线系统的实际传输速率为 200 MHz，尽管设备串音消除功能使得系统的传输速率能够达到 250 MHz。CAT 6 的屏蔽双绞线由4对 100 Ohm 双绞线组成，使用金属屏蔽的方式使整个线缆免受环境噪声干扰。大多数 CAT 6 线缆配有中心填充物，能够将线缆外套内每一对线缆分隔开来。工作站的接口是一个 8芯标准插座。据电信行业协会称，“6 类线是结构化布线标准中最新的一种线缆，其带宽是增强型5 类线的两倍。带宽的增加以及大幅提高了的抗外界噪声功能，使得 6 类线能够支持传输速率为几千兆位的应用。这本白皮书对6 类线以及应用标准进行了更新，可以作为 6 类线信息和产品查找参考。“参见 Category of Performance 和 PS-ACR。<br/></font></p>
