Used for end user lines or trunk lines, and can be deployed and connected to the equipment. The distribution frame is the most important component in the management subsystem, and it is the hub that realizes the cross-connection of the two subsystems, vertical trunk line and horizontal wiring. Patch panels are usually installed on cabinets or walls. By installing accessories, the distribution frame can meet the needs of UTP, STP, coaxial cable, optical fiber, audio and video. The distribution frames commonly used in network engineering include twisted pair distribution frames and optical fiber distribution frames. According to the place of use and purpose, it is divided into two categories: main distribution frame and intermediate distribution frame.

It will be our 2022 new released product The product is combined with RJ45 keystone and RJ45 plug for easy and fast connection The shielded provide better performance, without tool to punch or crimp the cables

The main distribution frame, referred to as MDF, is used to connect subscriber lines, trunk lines, and dedicated lines to the corresponding interface points of the telephone exchange for testing, wiring, and protection of internal equipment.The structure of MDF is divided into two sides, in-line and in-line. In-line can be installed and guaranteed, and the test row or wiring is installed in horizontal. For in-line trunk lines or dedicated lines that do not need protection, test racks or wiring bars can also be installed. The main distribution frame of the same model can be spliced to meet the needs of expansion. The main distribution frame of the subscriber exchange adopts the box type because of its small capacity. In the early days, the total distribution frame was large, with a maximum capacity of 303 loops per line. The security guard adopts 20-wire or 21-wire carbon lightning arrester and uses a hot coil to limit the current. The test row is 20 lines and adopts a four-line shrapnel type, and the lead-in and lead-out lines can be separated by separating the shrapnel. The new type main distribution frame is matched with the program-controlled switchboard to greatly reduce the size and weight, and each in-line can accommodate 1,000 lines. Ensure to arrange 100 loops per block, and use metal discharge tubes to prevent high voltage and overcurrent. Each test row has 128 lines, and the contact reeds can be separated, so that the lines can be easily separated for testing. The wires connected to the terminals have their own independent wire troughs, which are easy to install and maintain. The guarantee arrangement adopts the card connection method to connect, and the insulation layer of the wire does not need to be stripped when the card is connected. The test row adopts winding method for wiring. Both of these two wiring methods are simple, reliable, fast, and non-polluting. According to different occasions, the new type of distribution frame has wall-mounted, floor-standing, single-sided and double-sided types.The main functions of the main distribution frame are: ①Security function. It protects the subscriber line against high voltage or high current; ②wiring. Any user can choose the number in the office, and the trunk lines between different offices can choose to occupy the trunk modules in the office, and can connect the inter-office and related subscriber lines according to the needs of the dedicated line.Intermediate distribution frame, referred to as IDF, is a distribution frame that connects the incoming and outgoing lines between the internal telephone exchanges. According to its installation location, it can be divided into two types: the main distribution frame and the intermediate distribution frame of the switching equipment and the inter-machine distribution frame.The structure of IDF is also divided into two sides, in-line and horizontal, in-line connection of the equipment's outgoing line, and horizontal connection of the equipment's incoming line. Both in-line and horizontal lines are equipped with wiring strips. One side of the improved terminal block is winding. The other side is the wire bonding. The function of IDF is mainly to deploy the access lines between all levels of switching equipment in order to give full play to the role of all levels of switching equipment.

1. Crystal headThe method of connecting the crystal head has been posted many times in previous articles. Generally, it is crimped according to the line sequence of T568B: orange white-orange-green and white-blue-blue and white-green-brown and white-brown, arrange the lines The order of the cores, after cutting flat, insert the cores side by side into the crystal head according to the upward direction of the crystal head chip, and then put it into the 8P port of the network cable pliers, and press it.Tools: Use ordinary network cable pliers for Category 5 and Category 6, and special network cable pliers for Category 7 cables. No need to use the network cable pliers without crystal plug.2. ModuleThere are two ways to connect to the module, T568A and T568B. Generally, the T568B wire sequence is used for crimping. After the grooves are matched, use a wire cutter to punch the wire.When connecting the module, it is necessary to ensure a unified standard, which is the same as the crystal head, and there are numbers from 1 to 8 in the logo, which must be sorted in numerical order and then crimped.Tools: wire punching knife, no punching type module does not need to use wire punching knife.3. Distribution frameThe distribution frame also has two wiring methods, T568A and T568B, and the wiring method is also very simple. Take the six types of network cables as an example:Use a wire stripper to remove the outer cover and cross frame of the network cable;Then insert the core of the network cable into the card slot of the corresponding wire sequence;Then buckle the cable management ring into the slot and fix it with a cable tie to prevent it from falling off;Finally, install the distribution frame on the cabinet with cabinet screws.PS: The connection method of the patch panel is similar to that of the module, but the label of the wire sequence will be different for patch panels of different brands, so please pay attention to it when connecting.

Compressive strength: DC1000V (AC750V) 1min without breakdown and arcingRated current: 1.5AmpInsulation resistance: ≥200MΩContact resistance: ≤1MΩContinuous reactance: 20MΩWorking temperature: -25℃～70℃

There are many topics around CAT 8, and you and your customers may wonder how this will affect the deployment and testing of transmission facilities.We first have a little in-depth understanding of its deployment environment, as well as the key features that affect installation and testing.Only applicable to data centersCat 8 cabling supports up to 2 GHz, a distance of 30 meters, and 2 connector channels, which tend to be used in data center applications—not likely to be used for LANs. Cat 8's target market is data center edge applications, copper cable connections between servers and switches, which will carry the emerging 25 and 40 Gb/s rates.Although some high-speed direct-attach SFP+ and QSFP+ cables can support such high speeds between the switch and the server, these cables have a distance limit, which is limited to about 5 to 7 meters. Cat 8 supports a transmission distance of 30 meters, so it is very suitable for more flexible and manageable deployment when the edge switch is at the end of the row or in the middle position. Since Cat 8 shares the same connector and can automatically negotiate with existing business technologies, it has strong interoperability with these technologies.Alien crosstalkCat 8 wiring is a shielded wiring system, that is, shielded connections and FTP cables are used, and four pairs of twisted pairs are covered by metal foil. Metal foil shielding is essential to prevent noise from entering the cable or preventing noise in the cable.We know that the higher the frequency, the more serious the crosstalk (ie alien crosstalk) between adjacent cables. Therefore, the Cat 6A standard requires the measurement of alien crosstalk. The frequency of Cat 8 is four times the frequency of 500 MHz of Cat 6A, and of course compliance is still required-all the parameters required by the Cat 6A standard.As with Cat 6A shielded cables, it should be difficult to see any alien crosstalk on a Cat 8 system. But like Cat 6A shielded cable, it is still required to be tested. Why?First, Cat 8 has stricter alien crosstalk requirements. Secondly, if the installation is not correct, the shielded wiring may not pass the external crosstalk test, such as the shielding layer is not connected or the non-conducting side is not clamped.Shield integrity is criticalIf you are not familiar with the deployment and testing of shielded cables, you must be more familiar with Cat 8. This means that the installer and contractor need to ensure that the cable-connector shield is connected carefully, as well as the correct grounding and binding measures.In a data center, if a copper cable link is connected from a ground panel in a grounded cabinet to a ground panel in another grounded cabinet, the open-circuit shielding layer may still pass the wire diagram test. This is because the connectivity of the shielding layer has historically been a DC measurement, and the DC signal will reach the remote unit through the public building ground rather than through the wiring link. Therefore, it is difficult to diagnose a cable fault with an open shield.Fortunately, Fluke Networks already has the technology to solve this problem. Only the DSX-5000 CableAnalyzer™ provides the shielding integrity test function. It uses a patented AC measurement technology to prevent the grounded cabinet of the data center from causing the unconnected shielding layer to show that the connection is normal.You are one step ahead of timeNow that the TIA Cat 8 specification, component and link limits have been completed, work on the ANSI/TIA-1152-A field test standard can be finalized. Fluke Networks is the leader of this project and the editor of the standard, which stipulates field test methods and 2G accuracy.In addition, you have plenty of time to deal with detailed content about Cat 8. There are currently no Cat 8 components shipped, nor any 25GBASE-T/40GBASE-T equipment available. At the same time, Fluke Networks is working closely with leading cabling manufacturers to ensure that you can easily and reliably test their solutions on site when you start the installation.