Details about cabling system 6

We often encounter many problems when using the Integrated Wiring System. These problems are common. However, if we do not know this knowledge, it will cause us a lot of inconvenience, today, I will explain the answers to the six common questions of the Integrated Wiring System for your reference.

1. Q: network cable construction across long distances
I encountered this situation in the Organization. The office building is too wide, and the internet access point is on the far left of the building. What should I do if I want to achieve internet access on every floor and speed up?

Chen Yutong answer: the distance between the balanced twisted pair wires for data applications is 100 meters, which is defined by international standards. Transmission of network signals at a distance of more than 100 meters will depend on the performance margin of the Integrated Wiring System, the performance margin of network equipment, the construction of the site, and many other uncertainties, there is no quantifiable indicator and it cannot be guaranteed. For the case you mentioned, the standard practice is to set up two Telecommunications rooms on one floor, and horizontal cables are divided into areas to connect to the corresponding telecommunications room, ensure that the length of the horizontal link from the distribution frame to the information outlet is no more than 90 meters.

Of course, you can also use high-performance, good quality cables and modules for direct point-to-point connections over 100 m), but this line does not guarantee network application support, that is to say, it may support xDSL or 10BASE-T signals, but it may not support higher speed.

Wu jiana: the design standards of the Integrated Wiring System must be followed. If it is too long, you can consider adding a relay in the middle. For example, you can use a switch or hub to connect two network cables. Do not take the risk of being too long. This will bring uncertainty to network communication.

2. q: I would like to ask an expert. One of our company's network ports is divided from floor switches. After testing the switches, network ports, and the lines that are separated from floor switches, there is no problem with the computer, but the problem is that only the package can not receive the package, it is useless to change the number of computers. Is the connection line between the main switch and the switch on the floor damaged when cabling?

Chen Yutong: it seems that there may be a line problem, provided that the switch port and the computer port can normally send and receive packets on other lines. It is recommended that you use the Integrated Wiring System tester to test the channel transmission performance of the line, including the jumpers at both ends, plug-in distribution frames and information sockets at both ends) and the cables laid, select 5E or 6 according to the actual situation. At the same time, make sure that the Jumper used meets the line sequence standard of T568A/B.

3. Q: What are the special requirements for the Fiber Channel Integrated Wiring System in the data center machine room?

Zhang Yia: the optical cable channel in the data center is mainly used for 10-ge networks. Pay attention to the following points when selecting:
1 transmission distance: OM3 multi-mode optical fiber is 300 m-550 m, and single-mode optical fiber is 10-40 km
2. Fiber Optic connectors and adapters are SC, LC, or selected based on the port type of the network device.
3. If an open cable tray is used for laying optical cables, A or B data centers must be of the corresponding fire rating)
4. The position of the optical distribution module is as follows: the top of the cabinet, the opening tray, the columns Cabinet of the Integrated Wiring System, and various wiring cabinets)

4. Q: I would like to consult experts: Our company has a total of three-storey buildings, with 80-300 computers on each layer. The computer distribution area on each layer is over square meters. I would like to ask, in such a case, how can I do this to easily and effectively complete the network cable layout. Currently, it is relatively vague to place a layer-3 switch in the center area of each layer, and then connect the three switches through the PC server for network sharing, and then implement Internet access through the router. I don't know if this works? Thank you for your answers!

Zhang Yia: In the switching network architecture, an aggregation switch should be set up on the basis of a layer-3 switch. The aggregation switch Access Server serves as the data resource sharing platform for network users, then the aggregation switch accesses the Internet through the appropriate router. Note the following:
1. The wiring network architecture is compatible with the computer network architecture;
2. Note that horizontal Cables cannot exceed 90 m in length during floor wiring rooms;
3. The level of the integrated wiring system conforms to the transmission bandwidth of the Ethernet switch. We recommend that you use a level-5 or 6 Integrated Wiring System, and use multi-mode optical OM3 as the trunk) and configure the corresponding wiring module;
4. A detailed architecture diagram of the Integrated Wiring System should be developed and the interconnection relationship with the network facilities should be clearly indicated.

5. Q: How can I check and accept the network cabling? What aspects should we consider?

Zhang Yi answer: for the specific acceptance method, please refer to the GB50312-2007 "Integrated Wiring System Engineering acceptance specifications", the acceptance of pay attention to the following points:
1. Perform permanent link testing for all information points, and the connection model should comply with the standard requirements;
2. The testing index project is determined based on the networks supported by the Integrated Wiring System, such as Mbit/s, Mbit/s, and Ethernet. For details, see the standard indicator parameter table;
3. Determine the functions and accuracy of the test instrument;
4. Documents should be printed in the test results for storage;
5. The criteria for judging the quality of the project shall be qualified or unqualified ).
The specification has a more detailed description. If there are still problems, you can raise them again.

6. Q: Ask the gigabit network cable question: we do the cabling according to the or B standards. But I can see that the gigabit network cable has its own line order.

1: Can I run 1 Gbit/s On a or B-standard lines?
2: The gigabit network uses eight wires to work together. If the gigabit network is half duplex, do you only need four wires?
3: The POE power supply uses four cables in the network cable to transmit electricity, so the M line is good to say, but the gigabit network uses eight lines to transmit signals, is it impossible to implement POE power supply in Gigabit Port mode?

Zhang yianswer: Generally, the network cable is connected according to the wiring diagram of B. However, the same standard is used for the card line in A project, so it is not suitable for mixing A and B.
1. The cabling standard mainly depends on the port type of the network device. Generally, 10 M, 100 M, and M networks are connected by standard wiring. When a 10G network adopts a shielded Integrated Wiring System, there will be special connection methods, which will be carried out in conjunction with the installation manual provided by the manufacturer;
The two Gigabit Networks are basically all four pairs of lines and work in two-way mode.
3. There are two kinds of POE power supply modes: one is two pairs of wire transmission information, two pairs of wire power supply, and the other is line-to-line transmission of information and power supply. The POE power supply mainly depends on the functions of the network equipment, and there is no problem with the transmission line.

Chen Yutong answer: Gigabit Ethernet complies with the IEEE 802.3ab standard and supports enhanced cabling systems over five levels. If the components of your cabling system and the entire channel comply with Cat.5e standard, support for 1 GB for both standard a and Standard B
Gigabit Ethernet is fully duplex running on 4-to-4 pairs. Currently, no half-duplex gigabit network equipment is available on the market.
PoE is divided into two modes: endpoint and mid-span. The endpoint is powered by the switch port, and the end-span mode is used to load power in the middle of the line, currently, both modes support loading power signals on the data lines, and the Gigabit products of the two modes on the market both have

WU Jian A: two Gigabit interfaces are available: 1000BASE-T and 1000BASE-TX. They all use 4 pairs of cables, but they are used in different ways. 1000BASE-TX is sent in two pairs of M, and received in the other two pairs of M, so the full-duplex M throughput can be reached ). This interface must be supported by six types of cables.

1000BASET-T, which is a four-to-one transmission of 250 M, can also achieve 250*4, M full duplex transmission. This interface is available in cat5e and cat6 cables. Currently, the interface cost of most devices is slightly higher than 1000BASE-TX because 1000BASE-T requires the crosstalk Elimination Technology for device interfaces.

1. Detailed analysis on requirements of the Integrated Wiring System
2. Detailed analysis on requirements of the Integrated Wiring System
3. In-depth exploration of network integrated wiring engineering implementation specifications
4. Discuss acceptance criteria of integrated network cabling systems
5. Answer questions about 6 types of cabling systems