2:According to the number of computers to pre-judge the length of the cable, if the interval between each machine one meter. Please do not use a long cable connection, it is inconvenient to clean, it is not easy to manage
3: Do a good job of fire prevention, water leakage measures, this is a must. If you have the conditions, you can be buried in the wall
Threading requirements
One, threading preparation
1. Check the pipe groove
Threading should be strictly threaded before the inspection, the specific requirements of the corresponding pipe groove checking requirements, the following list is a serious impact on threading the quality of the quality of the pipe groove and the progress of the quality of the several problems:
Pipe groove specifications are small. The interface has burrs. Buried installation pipe trough blockage, water, etc.. Buried pipe troughs must be fully tested before threading.2. Documentation
wiring system system diagram wiring system plan wiring technical requirements blank wiring report3. wiring organization planning
understanding of the overall structure of the wiring system, do not wear the wrong route. Can clearly distinguish between the various cables to be laid, do not use the wrong cable. Familiar with the piping through which the cables pass. Experienced in threading cables and know how to prevent typical problems that affect the quality and schedule of threading cables. Understand and memorize our special requirements for laying cable for integrated wiring systems. Think clearly, group information points together, lay them in groups, and don't over-thread or under-thread them. Each group should be no more than 20 information points, otherwise the amount of cable at the same time wear put a large amount of wear put effort easily lead to cable damage, but also easy to wrap, knot, very much affect the progress. Faithfully and rigorously do the marking, and record the length scale. Rigorously organize the test, using a multimeter to measure through and through cable by cable.4. Technical requirements for threading
All steel pipe openings should be placed in plastic mouth guards. Threading personnel should carry the mouth guard, threading at any time to place.
Remaining length: the cable in the computer out of the box outside the remaining length of 30cm, the remaining line should be carefully wound up in the box. In the wiring box from the wiring cabinet entrance counting the remaining length of the wiring cabinet (length + width + depth).
Group tie: the remaining line should be grouped according to the grouping table grouping, from the wire slot exit straight tie, tie point spacing is not more than 50cm. not with wire or hard power cord tie.
Turning radius: 50-core cable turning radius should be not less than 162mm.
Vertical cable through the transition box into the vertical steel pipe to the next floor to go in the transition box to be tied hanging, to avoid the weight of the cable all the pressure in the corner of the inner side of the cable, which affects the transmission characteristics of the cable. The cable in the vertical trunking to be tied and suspended once per meter.
The cable in the trunking should be straight, no twisting, no length difference. If the opening of the trunking is facing the side, the cables should be tied and fixed every 1 meter.
Cables are labeled according to the computer floor plan, each label corresponds to a 4-pair core wire, corresponding to the room and the location of the socket can not be mistaken. The two ends of the marking position from the end of 25 cm, paste light-colored plastic tape, the top with a grease pencil to write the mark or stick a paper number sign and then wrapped in transparent tape. In addition, in the distribution frame end from the end to the wiring closet entrance every 1 meter to be used in the cable skin with a grease pencil to write the label.
According to the ratio of 3% of the wear spare line, spare line in the trunk trunk groove, at least 1 spare line per layer.
After the threading is completed, all 4 pairs of core cables should be fully tested for through and through. Test method: Strip all the core of the cable at both ends to expose the copper core. At one end of the digital multimeter dialed to the on-off test file, two pens steadily received a pair of cable cores; at the other end of the pair of cable cores one by one brief contact. If you can hear the intermittent "ticking" sound on the end of the meter, OK, each cable of the four pairs of cores should be measured. This test can find the problem is broken wire, broken circuit and labeling error.
5. Cable protection
Through the steel pipe when the ends of the steel pipe should be sheathed, all the cables through the pipe groove connection should be handled smoothly, there can not be any burrs, so as not to damage the cable.
The pulling force of each wire should be no more than 11 kilograms when tugging the wire, and the maximum pulling force of multiple wires should be no more than 40 kilograms to avoid stretching the cable conductor.
The cable used in this system is a high-speed computer network cable, which is expensive and has very little margin.
Cable once the outer skin damage to the core wire exposed or other serious damage, damage to the cable section should be discarded, shall not be connected, connected to the cable can not meet the signal transmission requirements.
The entire project cable storage, threading and release should be patient and meticulous, to avoid any extrusion of the cable, crushing, smashing, clamping, cutting, or excessive force stretching. Cabling to meet the required residual length, but also try to save, avoid any unnecessary waste.
During the wiring period, the cable is pulled out of the cable box has not yet been placed in place if you want to pause the construction, the cable should be carefully wrapped up and put away for safekeeping, shall not be scattered on the construction site.
6. Threading check
The person in charge of construction should check the work of the construction company after the threading is completed as follows:
Check the threading reportIncluding the length scale, and test results. The threader will not be paid until the threading report is complete.
Inspect cable trunks, group tie-downs, spot-check markings and scales, and spot-test pass-throughs on-site.7. Basic issues
If the threading can not realize the basic technical requirements will seriously affect the progress and quality of the later installation. The following basic requirements should be attached great importance:
The labeling should be clear, correct, and firmly affixed. The length of the remaining wire at the end of the distribution frame should be consistent, in line with the requirements, too much of the remaining wire should be cut off, grouped according to the requirements, stroking straight, from the exit of the trunk trunk line slot on the tie. Record the length scale of the ends of each line, and test strictly.15. Old building open plastic wire trough threading
This plastic wire trough is not easy to damage the cable, so the cable damaging problems generally do not occur.
The more typical problems of threading in this environment are:
The wires in the trough are not straightened, and the cover is not fastened.
16. buried concealed steel pipe, wire trough threading
Cable piping using buried installation of pipe troughs, pipe trough obstruction is the main problem, threading should be a comprehensive test before threading, otherwise it will be bound to be a long time threading process dragged across.
8. Ceiling wire trough steel pipe, wire trough threading
Threading on the ceiling need to set up a ladder operation, labor-intensive, but if the pipe groove laying are in line with the requirements, should be smoother. Should pay attention to the problem is not to wear too much at a time (less than 20), a wear 40 than wear two 20 to time-consuming, easy to mess.
Indoor cables should generally be laid in the top of the wall cable groove.
Communication equipment and various cables should be fixed to prevent arbitrary movement, affecting the reliability of the system.
In order to protect the indoor environment, indoor cable troughs should be installed, the cable is placed in the cable troughs, all the cables into the room, through the floor are required to play cable holes, all the lines should be horizontal and vertical.
Wiring project construction experience
A clear requirements, methods
Construction managers and technicians should be familiar with the network construction requirements, construction methods, materials, and can explain to the construction staff of the network construction requirements, construction methods, materials, and often in the construction site to direct the construction, check the quality of the construction at any time to solve the problem of construction personnel on site. The problem of the site construction workers.
Two, grasp the environmental information
Try to grasp the environmental information of the network construction site, according to the environmental information to ensure the reliability of the network protection measures:
In order to prevent accidental damage, outdoor cables should be threaded into the buried pipeline, such as the need for elevated, should be erected high (more than 4 meters high), and must be fixed to the wall or on the poles, do not frame on the poles, wires, walls, and so on, and so on, and so on. Do not put them on poles, wires, walls or even door frames or window frames. Indoor cables should generally be laid in the top of the wall cable groove.
Communication equipment and various cables should be fixed to prevent arbitrary movement, affecting the reliability of the system.
In order to protect the indoor environment, indoor cable troughs should be installed, the cable is placed in the cable trough, all the cables into the room, through the floor are required to play cable holes, all the lines should be horizontal and vertical.
Three, distinguish between different media
To ensure that the performance of the communication medium, according to the characteristics of the medium material, different construction requirements. Computer network system has many kinds of communication media, different communication media construction requirements are different, as follows:
Fiber-optic cable
a. Fiber-optic cable should not be stranded knots;
b. Fiber-optic cable bends the corner of the curvature of the radius should be greater than 30cm;
c. Fiber-optic exposed in the outdoor part of the steel tube should be added to protect the steel pipe should be fixed securely to the wall;
c. Fixed on the wall;
d. Fiber optic wear in underground pipes, should be added to the PVC pipe;
e. Fiber optic cable indoor routing should be installed in the line groove;
f. Fiber optic laying should be expansion and contraction margin, and the margin should be appropriate, can not be pulled too tightly or too loosely.
Coaxial cable
a. Coarse cable should not be twisted and twisted, should be laid naturally straight;
b. Coarse cable corner radius should be greater than 30cm;
c. Installed in the coarse cable on the distance between the work site should be greater than 2.5 meters;
d. Coarse cable connectors should be installed securely, and to prevent short-circuiting of the signal;
e. e. Coarse cable routing should be in the cable groove to prevent cable damage;
f. Coarse cable laying and pulling the line should not be too strong to prevent distortion;
g. Each network section of the thick cable should be less than 500 meters, several sections of thick cable can be used to connect the use of thick cable connectors, but the total length is not greater than 500 meters, the connector can not be too much;
h. Each network section of the thick cable ends must be installed terminators, in which the thick cable is not a short circuit;
h. Must be installed at both ends of each network segment of the thick cable terminator, one of which must be grounded;
i. Coaxial thick cable can be installed outdoors, but with additional protective measures, buried in the ground and along the walls of the part of the line to be added to the steel pipe to prevent accidental damage.
Coaxial cable
a. Cable laying should not be twisted knot;
b. Cable corner radius should be greater than 20cm;
c. Installed in the fine cable on the distance between the various work sites should be greater than 0.5 meters;
d. Cable joints should be installed securely and should be prevented from signaling the short-circuit;
e. Cable routing in the cable groove, to prevent cable damage;
f. Cable routing in the cable grooves.
f. When laying thin cables, do not pull hard to prevent breakage;
g. A thin cable should be less than 183 meters, two thin cables of 183 meters or less can be lengthened with a "T" connection;
h. Terminators must be installed at both ends, and at least one terminator of each section should be connected to the ground;
i. Coaxial cables should not be installed outdoors, and should not be installed in the outdoor areas, and should be protected from signal short-circuit;
i. The coaxial cable must not be installed outdoors, and the outdoor portion should be sleeved.
Twisted pair
a. Twisted pair in the corridor and indoor routing should be in the cable trough, should be straight;
b. Workstation to the Hub of the maximum distance of twisted pair of 100 meters, more than 100 meters can be used to connect twisted pair of connectors to connect the extension;
c. Twisted pair of routing in the room should be bundled into a line of zhang, routing to have a certain rule, can not be placed randomly;
c. Putting;
d. Twisted-pair cable should be marked on both ends of the number, so that it is easy to understand the node and Hub interface correspondence;
e. Twisted-pair cable should be inserted firmly into the Hub and the workstation's NIC;
f. Node is not in use, there is no need to unplug the twisted-pair cable, which does not affect the work of the other nodes;
g. Twisted-pair cable should not be installed in the outdoor, a small part of the installation outside, the installation of the twisted-pair cable should be installed in the outdoor, the installation of the twisted-pair cable should be installed in a small part of the network card. Installation in the outdoor part of the outdoor part of the installation should be installed with casing;
h. Choose eight-core twisted-pair cable, their own installation of the connector, eight wires should be installed, do not install only four wires, cut the other four wires.
Four, network equipment installation
Hub installation
a. Hub should be installed in a dry, clean room;
b. Hub should be installed in a fixed bracket;
c. Hub fixed bracket should be from the ground 500mm or more;
d. Inserted into the Hub cable should be fixed in the bracket or wall to prevent accidental damage. bracket or wall to prevent accidental disconnection.
Transceiver installation
a. Select the location of the transceiver to be installed on the thick cable (transceiver installation on the thick cable, the shortest distance between the two transceivers should be 25 meters)
b. Drill holes in the thick cable with the special tool for transceiver installation, drill in the middle of the cable to the bottom (i.e., drill all the way through);
c. Install the transceiver linker, transceiver linker, transceiver linker, transceiver linker, transceiver linker, transceiver linker, transceiver linker, transceiver linker and transceiver linker, and so on. If the resistance is infinite, usually the signal pin is not in contact with the thick cable core, or the transceiver connector is not fixed tightly, or the drilling hole is not drilled to the bottom, you need to re-drill the hole or force the transceiver connector to fix tightly;
e. Install the transceiver and fix the screws;
f. The transceiver should be fixed on the wall or the bracket, and should not be suspended in the air;
g. Install the transceiver cable;
h. The transceiver cable is firstly connected to the thick cable, and then the transceiver cable is connected to the thick cable. h. Transceiver cable first parallel to the thick cable to walk a section, and then turn to ensure that the transceiver cable plug and transceiver connection is reliable.
NET CARD INSTALLATION
a. NIC installation do not choose the computer's top slot, the top slot has a machine frame, affecting the network cable pulling and plugging, to the commissioning of the inconvenience;
b. NIC installation and other computer card installation methods, because the card has an external cable, the card must be used to fix the screws in the computer's frame.
V. Equipment Installation
In order to ensure the quality of network installation, the installation of network equipment should follow the following steps:
First, read the equipment manual and equipment installation instructions.
The equipment should be unpacked and inventoried according to the packing list, and the appearance of the equipment should be inspected and recorded in detail.
Equipment in place.
Installation work should start from the server, and connect the cables one by one according to the instruction manual.
Each piece of equipment separately for power, do a good self-test.
Each device is connected to the server and checked online, and problems should be solved one by one. Problems should be solved one by one.
Installation of system software, the main system of the interconnection work.
Install the software of each workstation, and each workstation can work normally on the Internet.
Resolve all the remaining problems one by one.
Users can go on the computer at will according to the operating procedures to familiarize themselves with the various functions of the network system.
The trial run begins.
Wiring construction steps and should pay attention to the problem
Construction steps:
1, survey the site, including routing, the need to consider the hidden nature of the building damage (structural characteristics of the building), in the use of the existing space while avoiding the power lines and other lines, the site of the situation of the necessary and effective protection of cables and other needs, the amount of work and the feasibility of construction (such as through the eye of the wall, etc.)
The user can freely access the computer to check the operating procedures to familiarize themselves with the various functions of the network system. (such as through the eye of the wall, etc.)
2, planning, design and budget, based on the above to determine the routing and apply for approval, such as the need to be in the load-bearing beams through the eye of the wall need to be carried out to the management of the application, otherwise it violates the construction regulations, etc.. The entire plan and the extent of damage to the description of the best by the A party and management approval. Amendments to the plans. On the basis of the official plan with the final permit, we calculate the materials and labor used, and propose the budget and duration of the work, as well as the construction plan and arrangement, taking into account the costs of management and operation in the implementation of the design. The degree of cooperation of the user is taken into account in the implementation plan. The implementation plan needs to be signed with the user's consultation and approval, and designate the person in charge of coordination
3,Designate the person in charge of engineering and engineering supervision, responsible for planning the preparation of materials, preparation of labor, the user's requirements for cooperation and other aspects of the matter, put forward the timetable for the cooperation of the various departments responsible for the coordination of internal and external and construction organization and management
4,On-site construction
5,On-site certification testing, production of Test report
6,Production of cabling marking system: cabling marking system to follow the TIA-606 standard, marking to have more than 10 years of warranty
7,Acceptance, documentation. In the above links must be established in the perfect documentation, as part of the acceptance.
Construction notes:
1,When cables have excess cable at both terminations, they should be cut to the length required and not rolled and bundled.
2,The distance between sections of wire that are counter-wound open at the joints of the cable should not exceed 2 centimeters. Excessive length will cause greater near-end crosstalk.
At the joints, the outer protective layer of the cable needs to be pressed in the joints and not outside the joints. This is because when the cable is subjected to external tension the force is on the whole cable, otherwise the force is on the metal part where the cable is connected to the joint.
3, in the cable wiring construction, the cable tension is a certain limit. Generally about 9 kilograms. Please confirm the pulling force with the supplier of the cable. Excessive tension will destroy the symmetry of the cable pair stranding.
Integrated Cabling Common Failures
Common Cable Failures
According to statistics, about 50 percent of a 70 percent of network failures are related to cables
System. So the quality of the cable itself, as well as the quality of the installation directly affects the normal operation of the network
. Network cable failure has a variety of generalizations can be
wiring system failures are divided into physical failures (also known as connection failures) and electrical
performance failures of two categories.
1 physical fault
Physical faults mainly due to subjective factors that can be directly observed
notice the failure, mostly due to the construction process or accidental damage to the network cable
injury caused by, such as: modules, connectors, the wrong sequence of wires, the link of the open
road, short-circuit, overlong and so on.
2 Electrical Performance Failure
Electrical performance failure mainly refers to the link of the electrical performance indicators do not meet the requirements of the
testing standards, that is, the cable in the signal transmission process does not meet the design
requirements. In addition to the quality of the cable material itself, the electrical performance factors also
include excessive bending of the cable during the construction process, cable bundling is too tight, excessive force
stretching and excessive proximity to sources of interference, such as: near-end crosstalk, attenuation, return wave
loss, etc.
Constantiation of the electrical performance of the cable is not only the quality of the cable material itself, but also the quality of the cable material itself.
Integrated wiring faults are mostly in the horizontal zone. Here more threading and module termination, the construction process varies from person to person, the building pattern is more complex than the vertical part. Overall there are 3 aspects that cause faults.
1, the electrical performance of the product itself, that is, the product design and production quality.
2, the design of the engineering program, according to the building pattern, the design requirements of the wiring system.
3, the construction process, which is the embodiment of the overall quality of the wiring, good products and good construction programs, are to have good construction completed.
The common error of playing the line
The common error of playing the line is open, short circuit, reverse connection (a pair of lines in the two cross, such as 1 corresponds to 2, 2 corresponds to 1). Another error is a cross-connection, such as 1, 2 corresponds to 3, 6. There are two main reasons for this error.
One is that the T568A standard is used at one end of the cable, while the T568B standard is used at the other end of the cable.
The second is that it is sometimes necessary to use such jumper cables in the actual application of the network.
Jumper cables are needed when hubs are cascaded to hubs.
Additionally, jumper cables are required when docking a PC to a PC (not through a HUB). Some users are able to access the Internet when using a jumper cable, and can cascade the HUB when using the correct cable.
This is because the HUB they are using is a smart HUB, which automatically reverses the wiring around the pair. But that doesn't mean that this way of wiring is correct.
Lastly, there is another mistake that is string winding.
This is usually caused by having 1 and 2 as a pair, 3 and 4 as a pair, 5 and 6 as a pair, and 7 and 8 as a pair.
A network communicates using 1, 2 and 3, 6, not 3, 4.
This kind of incorrect wiring cannot be detected by eye or multimeter because the end-to-end connectivity is normal.
And the biggest danger of this miswiring is that it creates a lot of near-end crosstalk.
It doesn't cause the network to go down, but rather it makes the network run very slowly, with on and off interruptions.
It is a soft fault, which is troublesome to check when the network is running.
The formula for calculating how many lines are needed
1, the longest line distance + shortest line distance)/2 = average
(average + 5 meters) X points = total length
Total length / 305 (standard meters per box) + 2 boxes = total number of boxes
+ the number of boxes can also be set by yourself, the first time, then, rather than more than a little bit of preparation after the fact
B: Distance to the farthest information point;
C: Number of information points per workspace per layer
Cable length required for each layer = (A + B)/2 * 1.1 * C
Total*** number of cable boxes required = sum of cable lengths for each layer / 305 meters / box
(Electronic Industry Press Integrated Wiring System Engineering Design)
3. C=[0. 55(F+N)+6]Xn(m)
C the amount of wires used on each floor
F is the distance of the farthest information socket from the wiring closet
N is the distance of the nearest information socket from the wiring closet
n is the number of information sockets on each floor
Simple formula:
1.(Longest wire distance + shortest line distance)/ 2 * 1.1 = average line length
Average line length * information points = total number of cables needed
Total number of cables / 305 = how many boxes of cables are needed
2. Number of cables: (longest + shortest)/ 2 x 1.1 + 2x building height
Number of boxes: number of cables x number of information points/305
3. (farthest distance + (Nearest Distance) / 2 *1.1 + Floor Height) * Number of Nodes) / 305 = Number of Cable Boxes.
Where: 1.1 factor is the loss; floor height is the height of the floor, if the horizontal trunking goes to the ceiling, it must be calculated; if it is a raised floor can not be counted; 305 is 1000 feet conversion.
4. The average of the longest and shortest cables X the total number of points, and then add 10% redundancy
Algorithms that do not follow the formula:
Calculating the length of the cables according to the formula is definitely not allowed in my experience
But there is no necessarily accurate method
In the course of the construction process there are also unpredictable variations it
We National eight-core twisted-pair cable (including Category 5, Ultra Category 5, Category 6) the longest wiring distance specified in the 100 meters
Design institute design drawings will be taken into account
So generally the shortest line should be in the ten meters, the longest line in the ninety meters (leaving a margin of ten meters)
Average, each line in the fifty meters
If the crossing of the floor, if the longest line in the ninety meters
This is a good idea, but it's not a bad idea.
Average, each line is about 50 meters
If you cross a floor, each line can be added to the height of the floor
The error will not be too big
The most critical thing is to look at the site situation, as well as to be proficient in reading the drawings, which is to take time and practice
Response Citation
[videogame software] [Original]Nobunaga Online Let me rejoice and let ... [Sunshine on the Walls] [Original] To our family (Zhenjiang... [全网搜索] Keywords: beauty steamed buns caused by the blood Wuji
ID: 08807070 森松尼 发表于：2006-3-23 12:13:04 第 2楼
Large logarithmic chromatograms are white, red, black, yellow, purple, blue, orange, green, brown and gray
Integrated wiring is a comprehensive industry, you have to understand a lot, you dare to say that you are an ... integrated wiring through, and is a master?
Because to become an expert in integrated wiring need to know a lot of aspects of knowledge, computers, networks, weak power, strong power, communications, cable TV and so on
My understanding is that the integrated: the information, voice, cable TV, broadcasting, monitoring and other weak power integrated, although all wiring, but there is also the installation of equipment debugging. In addition wiring is not as simple as putting a line, wire trough wire pipe is not born.
Integrated wiring involves a lot of things, never walk a line so simple
Which two wires in the network cable can be separated to do voice lines?
Wire order: white orange, orange, white green, blue, white blue, green, white brown, brown
Just 1, 2, 3, 6, not moving! Usually use 4 and 5. Blue and white blue, 7.8 two sticks for spare.
Can I run a 100 megabit network with 130 meters of Category 6 cable to pass the FLUKE test?
Can't pass the test. It can be used. Basically attenuation is hopeless to pass! FLUKE instrument test certainly not pass, on the length of this item, the instrument will show the test failed, FLUKE pair length limit value is 90M, but generally as long as the other indicators to meet the requirements, or pass the judgment! But the length of the pair of wires can not be too much.
The common error of playing the line is open, short circuit, reverse connection (a pair of lines in the two cross, such as 1 corresponds to 2, 2 corresponds to 1). Another error is a cross-connection, such as 1, 2 corresponds to 3, 6. There are two main reasons for this error.
One is that the T568A standard is used at one end of the cable, while the T568B standard is used at the other end of the cable.
The second is that it is sometimes necessary to use such jumper cables in the actual application of the network.
Jumper cables are needed when hubs are cascaded to hubs.
Additionally, jumper cables are required when docking a PC to a PC (not through a HUB). Some users are able to access the Internet when using a jumper cable, and can cascade the HUB when using the correct cable.
This is because the HUB they are using is a Smart HUB, which automatically reverses the wiring around the pair. But that doesn't mean that this way of wiring is correct.
Lastly, there is another mistake that is string winding.
This is usually caused by having 1 and 2 as a pair, 3 and 4 as a pair, 5 and 6 as a pair, and 7 and 8 as a pair.
A network communicates using 1, 2 and 3, 6, not 3, 4.
This kind of incorrect wiring cannot be detected by eye or multimeter because the end-to-end connectivity is normal.
And the biggest danger of this miswiring is that it creates a lot of near-end crosstalk.
It doesn't cause the network to go down, but rather it makes the network run very slowly, with on and off interruptions.
It's a soft fault, and it's a pain to check when the network is running.
You that's hitting the crystal head,hitting the line ---- I thought it was a large logarithmic cable.
Large logarithmic cable playing line should pay attention to, 1 peeling the outer skin of the attention in the see copper, because large logarithmic cable outer skin is thicker and harder, peeling is also more difficult. 2. Keep in mind that the color of the universal, no matter how many pairs of sets down according to the color of the universal will not be wrong. White, red, black, yellow and purple, blue, orange, green, brown and gray. Such as Huawei's cable pink, orange, green, blue and gray. 1 point, 2 points, 3 points, 4 points, full of points, large 1 point, large 2 points Huawei cable for 16 pairs or 32 pairs of large 2 points only pink, blue 2 pairs. 3. When playing line module and line card connection firmly, it is worth mentioning that due to the voice cable wire diameter is thin card knife card connection, such as the operation of the line is easy to improper card break. 4. For the 110 distribution frame do not use a hammer, vise strikes to install the module. To use special equipment. There is really no hammer to use when the module, hit with moderate force.
Fluke related questions!
The other day with the fluke test 200 network points, but the data show that there are some points is not pass, I want to ask you big brother is, fluke tester for utp what is the standard? I would like to ask you, what is the fluke tester's standard for utp, that is to say, what is the data to be passed?
FLUKE's data is automatically generated, but his test standard is selectable, you can choose the appropriate test standard according to your engineering requirements.
What is the meaning of RJ-45?
RJ is an abbreviation for Registered Jack, which means "Registered Jack". In the FCC (U.S. Federal Communications Commission Standards and Regulations) in the definition of the RJ is to describe the interface of the public telecommunications network, commonly used RJ-11 and RJ-45, computer network RJ-45 is the standard 8-bit modular interface of the common name. In the past, Category 4, Category 5, Ultra Category 5, including the just introduced Category 6 cabling, the use of RJ-type interfaces. In Category 7 cabling system, will allow "non-RJ type" interface, such as July 30, 2002, Simon developed TERA Category 7 connectors were formally selected as the "non-RJ" type of Category 7 standard industrial interface standard model. TERA connectors have a transmission bandwidth of up to 1.2 GHz, which exceeds the 600 MHz Category 7 standard transmission bandwidth currently under development.
There are four basic RJ modular sockets commonly found in network communications, each of which can connect to different configurations of RJs. For example, a 6-pole socket can connect to an RJ11 (1 pair), an RJ14 (2 pairs), or an RJ25C (3 pairs); and an 8-pole socket can connect to an RJ61C (4 pairs), and an RJ48C. 8-pole (Keyed) connects to an RJ45S, RJ46S, and RJ48C. RJ45S, RJ46S and RJ47S. RJ45 socket and RJ45 connector (crystal head) is the basic connector in the integrated wiring system, we will also introduce the RJ45 connector (crystal head) in detail later.
The RJ45 connector consists of a plug and a socket.The RJ45 module is one type of connector in a cabling system, and the RJ45 connector, commonly known as a crystal head, is the other.These two components make up a connector that connects between the wires in order to achieve electrical continuity of the wires.
How many phones can be connected to a single phone line
Parallel up to eight, and it depends on the line.
After more than eight, the loop current of the eight lines increases to the limit, which is equivalent to taking off the phone, and it may be that the program-controlled exchange end shows you taking off the phone before you do so.
Formulas for calculating how many lines are needed and line cao?
1, the longest line distance + the shortest line distance)/2 = average
(average + 5 meters) X points = total length
Total length / 305 (standard meters per box) + 2 boxes = the total number of boxes
+ the number of can also be set by yourself, the first time, then, would rather have more than a little bit of preparation, do not want to be after the fact
2, each service needs to be a 4 pairs of non shielded twisted-pair cable or 2-core (62.5/125 micron multimode) fiber-optic cable;
The total number of horizontal cables in each communication room = (the number of workspaces served by the communication room)＊(the number of services provided by each workspace)
Working Area Horizontal Wiring Calculation:
A: Distance of the nearest information point;
B: Distance of the farthest information point;
B: Distance of the farthest information point;
B: Distance of the farthest information point;
B: Distance of the farthest information point distance;
C: the number of information points in the workspace of each layer
Cable length required for each layer = (A + B)/2 * 1.1 * C
Total*** number of cable boxes required = sum of cable lengths for each layer / 305 m/box
(Electronic Industry Press Integrated Cabling System Engineering Design)
3. C = [0. 55 (F + N) +6]Xn(m)
C the amount of wires per floor
F is the distance of the farthest information socket from the wiring closet
N is the distance of the nearest information socket from the wiring closet
n is the number of information sockets per floor
What is the difference between RJ45F and RJ11?
RJ45 data (computer) connector, RJ11 voice (phone) connector.
What is the meaning of 568A and 568B, and what is the difference?
The latter is an upgrade and refinement of the former, but the latter contains the definition of permanent link and the Category 6 standard.
In addition, in the construction of integrated cabling, there are 568A and 568B two different ways to play line, two ways to have no impact on the performance, but it must be emphasized that in a project can only be used in a way to play line. 568A green, blue, orange and brown, 568B orange, blue, green and brown
I put the switch and the computer connected directly to the straight-through line, is it a straight-through line? Then why do you connect the wires from the switch to the module as A and B connections?
Switch to computer straight through.
How many cores of the eight-core wire are used in a 100-megabit network? Some say four, some say eight, I'm confused.
The 100 megabit uses four.
Situation: 200 meters distance, need to lay network cable, but no active devices like hubth in between.
Question:
1, with twisted pair cable (specification is about 100 meters longest), can we sacrifice speed for length, that is, 200 can guarantee 10m or 5m speed, provided that there is a relevant specification/standard as a basis;
2, if 1 does not hold true, can there be other options, thicker cable is too expensive.
A: Fiber to the desktop if there are not many points.
Now I have kept the length to 170 meters and will use thin cable to get it done (the boss doesn't want to spend more money).
I have a switch that will be able to make your twisted pair cable go 200 meters, it's called a netcone brand, I don't know if you can find it anywhere
The above information is for reference only!