Now more and more owners begin to pay close attention to the distribution frame, there are a lot of new buildings, new data center are considering distribution frame. But in the face of numerous distribution frame brand, should choose which kind of distribution frame? According to their own track distribution frame application cases for many years, some Suggestions on the selection of distribution frame to check 5 questions and you should avoid falling into five pitfalls. Notice these aspects, the choice of distribution frame scheme will bring the owner in the future application is convenient, otherwise the selected distribution frame is likely to bring the owner infinite troubles.
Question 1, distribution frame is port type detection or link detection type?
Now most of the distribution frame link type, but there are some manufacturers still USES the port type detection work. The reason is very simple, actually port type detection on the distribution frame system can only be detected the distribution frame of each RJ - 45 ports have jumper inserted, which as it is a port and other ports connected but don't know. It can do some stamper is by logic, say not good is by "guess". Such as the two ports has inserted the jumper, the port detection system is the two ports "guess" is linked with a jumper wire. Specific really connected, the system is not know. If you take two jumpers in system order respectively in the two ports, the port type detection of distribution frame can "guess" is wrong, it will think that this port is connected to the two together.
Detect type distribution frame of the system is not a link, link detection principle is the use of needle jump line technology will jump line 9 at the ends of the two RJ - 45 port to form a loop, link detection is to detect whether the circuit is connected state. Loop type (or link) to detect the distribution frame system can real-time command link relations between all ports, don't have to "guess".
Question 2, distribution frame system operation can jump line before?
This seems irrelevant, in fact, very practical. Such as at the time of system installation, the vast majority of cases, however, distribution frame system of the active device for various reasons have not finished installation and debugging, have not even plug. But at the same time distribution frame has been installed and can jump line. Due to the construction schedule, owner requires network must be opening, that is to say must jump line connection.
In this case, if it is a link to detect the distribution frame system is completely no problem, installation personnel can use jump line directly connects the distribution frame of the port. After the completion of the connection link relations between don't record one by one port. Because once the active equipment installation and debugging of the distribution frame, after turning on the power supply, a few seconds, distribution frame system through 9 pin circuit principle, scan all ports connection relations, and form a database accurately.
Port detection type distribution frame is different, if the distribution frame active device has not normal operation under the condition of forced jump line operation, the jumper each record a jumper, you must do the scene immediately, if the operation personnel records error or mistake operation, then this error will be hidden in the system, no one can perceive. Because the port detection principle is entirely possible less than the error. Wait until the distribution frame finish testing, those records the scene to a one way to use manual input into the computer. Similarly, if error occurred during entry, the error will be hidden, formation of future trouble.
Question 3, distribution frame at the time of power can jump line?
This question is similar to the second question, but it is also a very realistic and practical problems. And other electronic systems, distribution frame also have maintenance, upgrading and debugging. Sometimes require temporary power distribution frame system shut down. But at this time, the operation of the network is to ensure that, that is to say, normal maintenance or normal operation of network equipment. The so-called network maintenance, a large part of the work is to jump line operation.
And the second question, link detection type distribution frame even in the case of power can also jump line, does not use concerns the operation record. Port detection type if you want to jump in the case of a power line, is not a lot of manual records and entry, and there is no error correction function.
Question 4, jump line operation must follow the instructions of the work order?
Here to explain what is the work order and work order guide. Now almost all the distribution frame work order guidance function. A work order is I told before jump line operating system what to do, specifically is notification system I am going to put the two ports disconnected, or connect the two ports. Article a work order can contain a lot of this kind of disconnect, or connection. System can form a work order, after receiving notification, then according to certain order through a certain way of prompt guide operators to disconnect, or connection jump line operation. Here said the guide way has two kinds big, LED light-emitting diode display light guide and LCD liquid crystal display. At the back of the problem involves the two guide way.
Now there is a myth, seem to get the distribution frame step-by-step underground work order, then according to the above said two guide ways for jump line operation. In fact in the practical work in many cases, the network management personnel are more willing to save trouble, work order under direct to distribution frame to jump line operation, but let the distribution frame to do the work of operating records.
If it is a link to detect type distribution frame, the operation is no problem. Network management personnel as long as according to their own intend to jump jump line or pull out. That operation is done on the distribution frame to tidy up things behind, will feel very cool. Because distribution frame would make just the operation of the automatic recording, and automatic updates to link the database.
And port detection type distribution frame is miserable, jump line network management personnel must be carefully record after the completion of what you do just now, and log in to the system input these records immediately. If these records or entry what goes wrong, these errors will be permanently hidden down and pass it on, until the whole link database into a gobbledygook.
Question 5, jump line operation guide is that way?
Had mentioned above to the two kinds of guide way, LED light-emitting diode display light guide and LCD liquid crystal display to guide. Here do the introduction and analysis:
LED light-emitting diode display light guide, the LED indicator light is said here that all ports are equipped with this kind of lamp
Can be seen from the above, each RJ - 45 port above has a small LED display light. Operation of people need to do is to remember the two password, "remove the shiny" and "Chang Liang with". Its meaning is if the LED display lights flash, is the system let you jump line pull down even in the above. And see if there are two port lights are lit, and there is no sparkle, this is what you make it with a jumper wire to this two ports connected, if the connection is right the two lamp goes out.
If the connection is wrong, it is connected to the two ports are wrong leds will begin to shine, according to the meaning of "remove the shiny" that allows you to connect this jumper pulled down to reconnect. Just remember the two password, the system will guide you step by step operation, until all connections are correct. As you can see this is a "fool" type of operation mode, more applicable non-professional personnel operation. Abroad have network management personnel to use the telephone remote control remote district office of the secretary miss complete jump line operation case, in the domestic network management personnel to guide the migrant workers also use this method for half a day to complete hundreds of jump line operation and errors in the case.
Another guide is guiding the LCD display, typically in the cabinet at the level of the human eye to install a display screen
Content is shown on this screen indicates the jump line operation staff should do, below is a typical LCD display content.
In this case shows that the content of the cabinet is to make the operator put 1 no. 2 on the distribution frame 4 ports to connect to the no. 1 12 cabinet on the port number 9 distribution frame. Operators could see, at least in accordance with the instruction of the the screen is going to find the number, not too much trouble, but not be a "fool" type operation.
Exactly which guide the way the user can according to his be fond of, it should be said is not very key factors in the selection of guide way, but the user should know is that guide the way you want.
Mistake 1, 9 needle jump line is not international standard
Has repeatedly mentioned above 9 needle jump line technology. Contact with wiring or network people know that the line is to have four line, the corresponding RJ - 45 is 8 pin plug and port. So just have 9 needle jump line is not in conformity with the international standard. But few people know, in fact, RJ - 45 standard, there are 10 needle even jump line technology occupies 9 9 needle, RJ - 45 slots have a vacancy. That is why, 9 pin the jumper plug can be plugged into any of the RJ - 45 port. Because the needle jump line 9 is in line with international standards.
Erroneous zone 2, double distribution frame does not conform to China's national conditions.
First to see what is a single distribution frame, what is a dual distribution frame. Single distribution frame is received from the workspace cable end level distribution frame, and jump line can jump directly from the horizontal distribution frame the switch port
Dual distribution frame in addition to the above the horizontal distribution frame, switches, each port is sweet, sweet, received another switches on the distribution frame
In terms of the structure of the link above, the double distribution frame is more than a single distribution frame a distribution frame, so the cost must be high. Abroad, for reasons of security and stability, web designers more inclined to jump line at both ends jumper on the passive devices, so like in the form of a dual distribution frame. But in China in order to save investment, but is very popular in the form of a single distribution frame.
Distribution frame system based on link detection technology is to require wiring system adopts double distribution frame form. The reason is very simple, jump line contact to attend at both ends of the intelligent management, using a single distribution frame is only this side of the level of port management, on the other side of the switch can't participate in the management. Dual distribution frame is all the switch port mapping to the switch on the distribution frame, as shown in the figure 6. Such distribution frame system can jump line at the ends of the distribution frame information acquisition, to participate in the intelligent management.
From the above chart can see, if you want to using link detection principle distribution frame, double distribution frame structure is almost inevitable. Also must be higher than the cost of its single distribution frame scheme. But the distribution frame itself is for high-end users, such as data center, large enterprises and institutions of the building and so on. Most of these users want to improve in the future by distribution frame of management level, reduce management costs, reduce downtime, improve the stability and safety of the whole network system, so as to recover the original distribution frame of the investment cost. And there are many such users in consideration to the wiring system stability and reliability, if not on the distribution frame will adopt the dual distribution frame. For example, has some of the data center design standard must adopt the dual distribution frame.
Anyway, using the distribution frame in order to realize the intelligent network management in the future, in order to reduce the cost and give up the principle of intelligent, in fact is deviated from the basic principles of distribution frame to use, the result is obviously do more harm than good.
Myth of jump line 9, 9 needle is easy to break
On the principle of 9 needle jump line the company has a variety of design scheme. Its most solutions are adopted and jump line 8 core wire gauge, plugs, sockets, is only a plug in RJ - 45 placeholder with a needle, people generally don't watch carefully is difficult to identify
Even the RJ - 45 plug of the lateral contact reeds, its structure design also give full consideration to the reliability and safety requirements, such as not intentionally damage with special tools, its reliability is beyond question. Needle break line 9, as it were, the chance and other 8 core wire break is the same. In more than 10 years of practice, both of which company 9 needle plan distribution frame have not heard of the problem of disconnection.
Myth # 4, distribution frame is only applicable to network management level of the unit
Wrong! Only the intelligent distribution frame will depend on a high level of management departments and personnel. Because the intelligent distribution frame requires operators must be in strict accordance with the operating procedures to jump to jump line, if wrong, system will likely miscalculation. Other than intelligent distribution frame link connection relationship whether or not according to work order, all is to rely on manual entry. This, of course, there are strict requirements to operators. In this distribution frame system, it will only increase the cost of management.
And intelligent distribution frame is full intelligent management, it has error correction ability, even if the operator is wrong, the system will be to guide the operator to correct its mistakes. Link relations is no operator intervention, intelligent distribution frame automatically identify link connection relationship and automatically update the database link. Intelligent distribution frame can greatly reduce the dependence on operator, reduce labor intensity, save the maintenance cost and greatly improve the reliability and security of the system.
Myth 5, 9 needles technology distribution frame if ordinary jumper may result in a chaos
First of all, the possibility is very small, in the actual engineering project, if the scheme of 9 needle jump line between its network in only 9 needle jump line exists, there will be no ordinary crypto-software to jump line. Another 9 needle jump line generally adopts a special tries to distinguish with other colors. So even if other ordinary jumper belong here, it is easy to be identified. Happened again, ten thousand steps back, really ordinary jump line access 9 needle jump line distribution frame, distribution frame will determine whether the link is in off state (because there is no needle form loop) 9, at this time if it is according to the work order construction or operation on the jumper, LED display lamp or LCD display screen will prompt the operator, jump to work is not yet complete, force the operator to work, otherwise the system won't let operators continue to work.
If not according to the work order to guide the operation, but the operator to put the common jump line 9 needle distribution frame, the system will determine whether the link is in off state, but at the same time as a result of the ordinary jump line 8 core is in the connected state. Connected, as long as the network IP address will be displayed on the tree structure, the network management personnel immediately found the paradox, network transmission is normal but show off state distribution frame. The reasons for this is only one, it is 9 needle jump line didn't work. This time, the network management personnel as long as the work order issued a broken link (not really want to disconnect, just to note the port location, later can cancel this work order), the two ports of the LED indicator light will begin to shine. To the front of the cabinet look at this pair of shining port between the jumper, reason is loud and clear. The process of using bootstrap LCD distribution frame is essentially the same.
The distribution frame wiring scheme is generally going to increase a lot of investment, how to make these investments really play a role is the responsibility of the decision makers. Wiring manufacturers with high brand awareness need not also an edge on distribution frame scheme. Distribution frame is mainly involved in the electronic and network technology, the traditional wiring industry is related to the material industry. Only to inspect the distribution frame of the actual use cases and customer feedback is easy to decide what is good or bad. This article provides the determination method is only reference for policy makers.