Weaknesses Security What fiber optic cable is mainly used

Weak current security generally uses single-mode optical cables, because the most commonly used optical transceivers are single-mode. The minimum number of ordinary cores of outdoor optical cables is 4 cores, and then they are added in pairs, that is, 4, 6, 8, 12, these are more commonly used, and how many cores are used depends on your engineering design. The function of a pair of ** optical transceiver is divided into 1,2,4,8,16,32 ** **You can choose to add 1 channel 485 reverse control to connect to the PTZ control line.

A pair of optical transceivers only needs one core to be sufficient, that is to say, if you use a pair of 32-channel optical transceivers, you also have to connect a 4-core optical cable. The normal design is that you have to keep one core for the fiber to spare, that is to say, if you need to use three cores, then you can pull a 6-core one. That's detailed enough.

Whether the fiber optic cable used for security is indoor or outdoor

It doesn't matter that you can·· It can be overhead or buried· It's the same purpose as your cable...

Security is mainly used for light transceiver·· Most of the security industry uses single-mode optical fiber, and few people use multi-mode

One core can be connected to a pair of optical transceivers...

If you use an 8-channel optical transceiver, that is, one core can transmit 8 surveillance images, and the others are not clear for a while, it is recommended that you can question the optical transceiver manufacturer, and they will tell you how to use it.

The number of cores depends on your machine.

How to use it, a single network cable more than 80 meters, it is recommended to use optical fiber, if you want to be cheap, you can use the way of pipe + leather fiber optics.

Optical cables are divided into single-mode and multi-mode, and single-mode is mainly used for long-distance transmission, which is popular and one-sidedly called city to city. Now in the general intelligent building, multi-mode fiber optic cable is enough. Because the quality of single-mode optical cable terminal equipment is much higher than that of multi-mode terminal equipment, the quality of multi-mode optical cable is higher than that of single-mode, but single-mode is better than multi-mode in terms of performance.

Optical cables are divided into indoor and outdoor, mainly according to the environment, if it is buried outdoors, then use heavy armor, and use light Kai for suspension. There is no big difference between indoor optical cables, and the number of cores of optical cables is reasonably selected according to the density of room information points.

The TV signal is in the building: the main cable is generally selected SYWV75-7, and the horizontal cable is selected SYWV75-5. Between buildings, optical fiber or SYWV75-9 or cable cross-section is generally selected.

In the case of fire alarm, the flame retardant of the cable is certain, and the cross-sectional area is satisfied. The power cable is selected according to the number of equipment to be supplied and the distance to be supplied. There are no too high requirements for the alarm cable, and the square single strand can meet the needs of the call.

In fact, the biggest basis is the cost of the project, some cross-sectional areas can be large or small, which is from the perspective of the engineer or the capital has the final say.

Only personal knowledge, please advise the masters

Know how much to answer how much:

1. ** line, has little to do with the wire diameter, there can be a voltage drop of tens of V between the switch and the phone, which is approximate as a current source, and there is a voltage stabilization circuit inside the phone, as long as the phone is connected to the phone, the phone can still get a voltage of about 10V to work, and more consideration is the laying occasion and method;

2. Network lines, check the parameters of the wire, such as the maximum distance of Category 5 wire can be laid about 150m, and the maximum distance of Category 5 wire can be used in a slightly farther distance, which is said to be up to 200m;

3. Optical cable (I haven't used it, I don't dare to talk nonsense);

4. TV line, consider the attenuation of line loss to field strength, for example: amplifier output 108db, terminal requirements of about 80db, if the line is 75-5 wire, the loss is about 10db 100m, in addition to the distribution loss and insertion loss of the branch distribution device (insertion loss has at least db), check the total loss, if not satisfied, you need to use 75-7 or 75-9 or 75-12 and other wires (branch line, trunk line), if the 75-12 line is still too long, the loss is too large, Only the line amplifier (relay amplification) can be added;

5. Fire alarm, the line is similar to the first line and computer network, but at least the wire is used as the bus in the project, the power line is checked according to the strong electric principle to check the line voltage drop, generally with a square wire, the linkage control line is similar (usually in the controlled equipment end of the field power supply, fire only provides drive control signal), when the long-distance voltage drop is not satisfied, a repeater can be used.

It depends critically on the size of your perimeter and what your project is for. If the perimeter of your project is relatively large and there is interference, then it is more appropriate to use fiber optic cables; On the contrary, it is better to use cables. Beijing Jing'an Energy Technology Co., Ltd. is a manufacturer specializing in the production of vibrating optical cables and vibrating cables in perimeter alarm products, you can go to their company's ** to have a look.

1. Specifically, look at what kind of bai-like outer ring du

Installation in the context is to install and make.

Zhi with the environment. 2. Whether there is a huge interference in the distance capacity and signal transmission of the installed equipment and the host in the installation 3. The communication protocol of all devices ( 4. If you choose to use optical fiber to transmit signals, you should also choose multi-mode or single-mode optical fiber. The basic method of connection is to use a media converter in the place where the data is sent and received (to see what kind of communication protocol is used to meet the requirements of the media converter, and some need to convert the protocol), which is the basic connection.

However, fiber melting is required when the fiber optic cable is connected.

Your question is a bit too much

Do you mean the splicing of pipelines or the conversion of photoelectric signals?

The connection of optical fiber needs to be equipped with an optical fiber fusion splicer, but the optical fiber fusion splicer is very expensive, and the operation process requires professional training, it is recommended that you can ask the master to do it, ** according to the number of welding splices, generally one in the range of 20 yuan to 40 yuan. As for the conversion of optical fiber signals, there is a photoelectric converter, but this process requires the fusion of optical fibers as the premise.

In the security construction, for the distance of more than 1000 meters can be considered the use of optical fiber transmission, if the image quality requirements are higher, the cost is not too sensitive, you can use optical fiber at any time to achieve the best effect.

Attention should be paid to the process of wiring; Avoid or reduce human activities, external construction, natural disasters, etc. If there are large factories around the traces from time to time, the interference is generally not obvious. The cost is about 12 yuan a meter, this is not very clear, I haven't heard the master say it.

Beijing optical fiber access mode provides you with a safe and stable network environment.

Generally, it is to directly lease telecom or mobile optical fiber, and each core I used to make was made by the public. Quiet. The bureau went directly to them to talk, and the telecom was 160 yuan per month, and the mobile was 260 yuan per month, which is very different.

In fact, the ** in each region is different, and it is so cheap here because the local operator wants to intervene in the company. Quiet. Bureau of security system, so give this **.

In the past, we signed a contract where the contractor paid the operator in the first year, and the construction unit paid in the next year.

Generally, bare fibers are leased, and a pair of bare fibers are charged according to their length. There are also those that are charged according to bandwidth. Generally, it is charged on an annual basis. If there are many lines, it will be charged monthly.