Comprehensive network cabling system has a lot to study place, here we mainly introduces gigabit nets and six types of wiring introduced the related issues, including with gigabit nets on how to reasonable wiring etc, believe that with the continuous development of informatization, the demand of people will be higher, various wiring technology will play their expertise.

As is known to all, Ethernet technology and network integrated wiring system technology, so closely associated gigabit Ethernet technology is how to develop to support new generation of cable, especially in the agreement of the six categories of cable?

Gigabit nets need six types of wiring

Current network integrated wiring system industry need six classes on whether the debate a lot, remember muting when in 1992, and three wiring popular five kinds of comprehensive network cabling system, only the first put forward 10Mbps is cheap for running Ethernet (is the maximum distance that 10base-t) and 25MbpsATM LAN and the basis of the three developed wiring. When Ethernet bitrate increased to 100Mbps, ATM LAN for 155.5 Mbps, growth in order to the basis of three wiring to support these LAN technology, electronic equipment to improve its complexity and cost. 100Base - T4, 100Base - T2 and 155.5 MbpsCAP64ATM LAN require complex DSP technology in order to overcome the limitations of three wiring. With five kinds of comprehensive network cabling system adopted by many end users, cheap 100Mbps (100Base - TX) Ethernet and 155.5 MbpsNRZATM LAN also get development and in five categories based on the wiring got better performance.

The actual situation indicates: use 100BASE - three wiring operation when each user connection mutant T4 all fees (e.g. from router to nic, including cable for 246 dollars, and in five categories based on 100BASE rewiring realized only cost us $198 - TX, in contrast, the average users connect to cost savings by 24%.

No doubt, the same development will occur again in 1000Base - T LAN technology, because 1000Base - TX design USES two lines of sending, receiving work two ways, so don't need full-duplex mode offset the echo. In order to shorten the time to market, will choose 100Base - TX use coding way, MLT - 3 MLT - 3 bandwidth per hz 4-bit efficiency, therefore bandwidth for 125MHz. This well in the NEXT six categories of wiring restrictions, so PSNEXT range and crosstalk offset is unnecessary. As the current semiconductor technology level to see, do not use back to spread crosstalk offset 1000Base devices will at least reduce the 50% - TX design with current overall complexity (compared 1000Base - T design).

Apart, if the data rate extended to 500Mbps improve from each 600Mbps, then the design to can be used on 1.2 Gbps system. Therefore, six types of wiring can not only reduce the support gigabit Ethernet electronic equipment costs, but also for future 1Gbps LAN technologies might exceed provides basic facilities guarantee.

Wiring infrastructure investment will be considered a long-term investment, wiring facilities should themselves be as an asset. According to the international standard, a ISO11801 muting life expectancy wiring system for at least 10 years. At that time, PC technology will make great development. So far, the desktop system, while still didn't use 1Gbps demand, but it is mainly because the current PC internal bus structure caused, because the bus limited decision processors and memory and other peripheral equipment (such as nic) between data exchange rate. Famous Moore's law prophecy, chip transistors number every 18 months has doubled. This is often used to describe PC processor performance growth, that is to say, every 18 months PC performance will be doubled. By analogy, in wiring system life cycle, 1000Base - TX technology is applied to the desktop system is very possible.

Gigabit nets how to wiring

Perfect network integrated wiring system design is the guarantee system success of the foundation, the designer of the user fully understanding end users of computer network and business application needs, on the basis of comprehensive network wiring system to the overall framework plan, thus designed reflect user the actual demand of network integrated wiring system diagram. In architectural design must be considered when network integrated wiring system tube slot to and space, low between Wells and low position, elv systems design should be ZhuJiFang, telephone exchange computer room set aside enough position and space, each business department information points quantity and position distribution should begin and end users also discuss sure.

In addition, network integrated wiring system should be designed according to the computer network transmission rate, bandwidth and application software requirements, according to international and euramerican integrated wiring system standard for network integrated wiring system products (cables, connectors) level, specifications proposed regulations, also want to consider the user environment on comprehensive network wiring system security and secrecy requirements, considering whether to adopt flame retardant, non-toxic and shielding products. At present, the most comprehensive network cabling system project used more euramerican famous brand products. Muting Comprehensive network cabling system product choice basically should consider whether the wiring product that meets international and euramerican integrated wiring system standard, satisfy the computer network and business application on the network integrated wiring system requirements. Users and design according to the actual need only to product and investigation and inspection supplier.

Comprehensive network wiring system's implementation is the key to realize system design requirements, and at the same time, in the entire user's construction engineering and elv systems implementation process, the network integrated wiring system construction, ending the night comes, the architecture, specialized and other elv systems coordinate and cooperate, therefore, most of the network in integrated wiring system construction team must have the corresponding construction qualification, construction workers should have good quality. Meanwhile, project management of network integrated wiring system to all aspects of the construction planning, supervision and guidance to ensure comprehensive network cabling system according to the design requirements on time, complete with a high quality.

In project management, deal with the following frequently met in construction situation attention: first, comprehensive network cabling system design drawing, construction and installation drawings and fine decoration drawings is consistent, if design drawings update cannot seasonable distributed to each system, will occur with each system, leading to engineering rework, cause increased cost and delay period. Secondly, design change would not affect the progress of the projects and cost budget, any projects, meet unavoidable, but change proposed change must discreet, and must according to normal processing program. Meanwhile, the progress of each system with, on-spot coordination and product delivery, storage and system site protection problems also cannot be ignored.