1. Use the cartridge to wire the wall and the ground before opening the slot for positioning. A 15mm layer of dust should be left on the pipe surface and the wall to prevent cracking of the wall surface.
2. Do not arbitrarily destroy or change public electrical facilities, such as lightning protection grounding and protective grounding, without permission.
3. When the power line pipe is buried, it should be considered to maintain a distance of more than 500mm from the weak electric line, and the parallel distance between the electric pipe and the hot water pipe and the gas pipe is not less than 300mm.
4. The direction of the wall line pipe should reduce the turning as much as possible, and avoid the installation position of the wall mirror, furniture, etc., to prevent damage by the hammer and nail.
5. If there is no special requirement, in the same suite, the switch is between 1200-1500mm from the ground, 150-200mm away from the door, the socket is about 300mm away from the ground, the socket switches are on the same horizontal line, the height difference is less than 8mm, and the installation is side by side. The height difference is less than 1mm and is not blocked by sliding doors, furniture, etc.
6. All kinds of strong and weak electric sockets should not be lacking. There should be power sockets and a telephone socket on both sides of the bed. Near the computer desk, more than three power sockets should be set on the background wall of the living room TV cabinet. Sockets for TV, telephone, multimedia, broadband network.
7. The laying method and requirements of the weak electric lines such as audio, TV, telephone, multimedia, and broadband network are the same as those for the power line. The socket or cable box is installed side by side with the power socket, but the strong and weak electric lines are not allowed to share a casing. .
8. All the in-wall wires are buried with more than 16 PVC flame-retardant tubes. The wires occupy less than 40% of the pipe diameter, and the special interface pieces are connected with the bottom of the box.
9. When using the conduit, the power conduit should be made to make a reasonable turning radius when passing through the ground. Pay special attention to the fact that the casing must be used under the ground and the rubber is tightly connected. Before the ground is closed, the PVC sleeve must be protected. There is rupture damage; the PVC casing should be completely covered by cement mortar when laying the floor tiles.
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RJ45 port editing
1. Origin:
2. The name RJ stands for the registered jack and is the USOC (universal service ordering codes) code of bell system. USOC is a series of registered sockets and their wiring mode, which are developed by bell system to connect the user's equipment to the public network. FCC regulations control the application of this purpose. The FCC (Federal Communications Commission) issued a document on behalf of the U.S. government to specify RJ11.
3. RJ11 is the common name of the connector developed by Western Electric Co. Its shape is defined as a 6-pin connecting device. Originally called wexw, where x means "active", contact or needle. For example, we6w has all six contacts, numbered from 1 to 6. The we4w interface only uses four pins, the outermost two contacts (1 and 6) are not used, and we2w only uses the middle two pins. For RJ11, the information source is contradictory. It can be a 2 or 4-core 6-pin connector. What's more confusing is that RJ11 is not only used to represent the 6-pin connector, it also refers to the 4-pin version.
4. RJ45 and RJ11: different standards, different sizes
5. Due to the different sizes of the two (RJ11 is 4 or 6-pin, RJ45 is an 8-pin connection device), it is obvious that the RJ45 plug cannot be inserted into the RJ11 socket. However, it is physically feasible (RJ11 plug is smaller than RJ45 jack), which makes people think that they should or can work together. It's not. It is strongly recommended not to use RJ11 plug for RJ45 socket.
â’ because RJ11 is not internationally standardized, its size, insertion force, insertion angle, etc. are not in accordance with the international standard connector design requirements, so interoperability cannot be guaranteed. They even cause damage to both. Since the RJ11 plug is smaller than the RJ45 socket, the plastic parts on both sides of the plug will damage the metal pin of the inserted socket.
RJ - 45 port is our most common port, it is our common twisted pair Ethernet port
Because twisted pair is mainly used as transmission medium in Fast Ethernet, RJ-45 port can be divided into 10Base-T network RJ-45 port and 100base TX network RJ-45 port.
Among them, the RJ-45 port of 10Base-T network is usually identified as "eth" in the router, while the RJ-45 port of 100base TX network is usually marked as "10 / 100btx". This is mainly due to the fact that most products of Fast Ethernet router still adopt 10 / 100Mbps bandwidth adaptive.
The left figure shows the RJ-45 port of 10Base-T network, while the right figure shows the RJ-45 port of 10 / 100base-tx network. In fact, the two RJ-45 ports are exactly the same in terms of the port itself, but the corresponding network circuit structure in the ports is different, so they can not be connected casually.
Definition of RJ45 interface pin signal
Ethernet 10 / 100Base-T interface:
1 TX + tranceive data +
2 TX - tranceive data -
3 RX + receive data +
4 N / C not connected
5 N / C not connected
6 RX - receive data
7 n / C not connected
8 N / C not connected
Ethernet 100base-t4 interface:
1 TX_ D1 + tranceive data +
2 TX_ D1 - tranceive data
3 RX_ D2 + receive data +
4 BI_ D3 + bi directional data +
5 BI_ D3 bi directional data
6 RX_ D2 - receive data
7 BI_ D4 + bi directional data +
8 BI_ D4 bi directional data
Note: RJ45 interface adopts differential transmission mode, TX + and TX - are a pair of twisted pair, which can reduce interference when twisted together.
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