Hello, everyone, welcome to Zhuhai hanqin cable co.,ltd ,in this article, we are going to discuss the CAT7 cable standard.
Although the Category 7 line standard has not been officially released, there are already many drafts, and many companies with strong technical strength have released products based on Category 7 wiring systems, such as AMP (AMP) and Simon. The CAT7 cable standard is a set of cabling standards that support transmission with a bandwidth of up to 600 MHz on 100 twisted-pair cables. In September 1997, ISO/IEC formally confirmed the development of Category 7/Class F cabling standards.
1. CAT7 standard basis
Compared with Category 4, Category 5, Category 5 Super, and Category 6, Category 7 has a higher transmission bandwidth, at least 600 MHz. Not only that, the seven-category wiring system is different from the previous wiring system. It is no longer a cheap unshielded twisted pair, but a double-shielded twisted pair. There have also been major changes in the network interface. When the seven types of standards were formulated, a total of eight types of connectors were proposed, two of which were RJ styles and six were non-RJ styles. In January 1999, the ISO technical committee decided to select an RJ and a non-RJ type interface for further research. At the ISO/IEC JTC 1/SC 25/WG3 working group meeting in August 2001, the ISO organization reaffirmed that the seven types of standards are divided into RJ-type interfaces and non-RJ-type interfaces. Among them, the feasibility of the RJ type interface is being reviewed and studied by the IEC SC488 organization. On July 30, 2002, the TERA seven-category connector developed by Simon Company was formally selected as the standard mode of the non-RJ-type seven-category standard industrial interface. The transmission bandwidth of the TERA connector is as high as 1.2 GHz, which exceeds the transmission bandwidth of the seven types of standards currently under development of 600 MHz. It can simultaneously support voice, high-speed network, CATV and other video applications.
The non-RJ type seven wiring technology completely breaks the traditional 8-core modular RJ type interface design, and is free from the limitation of the RJ type interface. It not only enables the transmission bandwidth of the seven types to reach 1.2GHz, but also creates a brand-new 1, 2, 4 pairs of modular form. This is a new type of interface form that satisfies wire-pair and wire-pair isolation, is compact, highly reliable, and easy to install. For example, the TERA connector can provide excellent transmission bandwidth, which exceeds the transmission bandwidth of the 600 MHz Category 7 standard currently under development. This allows some applications that require high bandwidth, such as broadband video applications up to 862 MHz, to run in Category 7/Class F cabling systems.
Due to the compact design of TERA and the modular multiple connection plugs of 1, 2, and 4 pairs, a single Category 7 channel (4 pairs of lines) can simultaneously support mixed applications such as voice, data and broadband video and multimedia, which makes it possible in the same A variety of applications can be managed in the socket, reducing the previously necessary fiber, coaxial, and twisted pair cable requirements, thereby reducing the cost of high-speed LAN equipment.
- The main advantages of Category 7 lines
Compared with the existing Category 5 and Category 6 twisted-pair cabling systems, the Category 7 wiring system has the following obvious advantages.
- At least 600 MHz transmission bandwidth
(2) The minimum transmission bandwidth specified in the seven types of standards is 600 MHz, and the use of non-RJ type seven wiring technology can reach 1.2 GHz. And it is required to use double-shielded cables, that is, twisted-pair cables that are individually shielded for each pair and also shielded as a whole to ensure the best shielding effect, see Figure 3-5(b). The powerful noise immunity and extremely low external radiation performance of this seven-category system make the high-speed local area network (LAN) do not require more expensive electronic equipment for complex coding and signal processing.
Compared with Category 6 and Category 5, non-RJ Category 7 has higher transmission performance requirements. Category 6/Class E is currently the technology that provides the highest transmission performance without using a separate pair of shielding form. For most commercial applications, the 250 MHz bandwidth of Category 6/Class E is sufficient for users throughout the life of the cabling system. Therefore, Category 6/Class E is the best choice for commercial building wiring. The target of Category 7/Class F is better than the performance of every transmission parameter of any balanced cable.
Double-shielded Category 7 cables have a much larger outer diameter than Category 6 cables, and are not as flexible as Category 6 cables. This requires special care when designing the installation routing and termination space, leaving a lot of space and a large bending radius. In addition, the two are also different in connection hardware. The seven types of standards under development require connectors to provide at least 60 dB of crosstalk isolation between pairs of wires at 600 MHz. This requirement is 32 dB more stringent than the requirements of Category 5
at 100 MHz, and at 250 dB than Category VI. The requirement of MHz is 20 dB, so the seven categories have strong anti-interference ability.
(2) Cost saving
People may have this question: Since non-RJ type 7 wiring can achieve the transmission performance of optical fiber, why not use optical fiber to replace non-RJ type 7 wiring system? The most important thing for users is cost.
Compared with the total cost of an optical fiber local area network, non-RJ type seven wiring has obvious advantages. A cost for the installation of 24 SYSTEM 7 (SYSTEM 7 adopts double shielded TERA connectors, a standard twisted-pair cabling system solution with a transmission performance of up to 1 GHz per pair) and 62.5/125 μm multi-mode fiber channel system installation After comparative research, it is found that the installation costs of the two are similar. But the cost of a fiber optic LAN device is about 6 times that of a twisted pair device. When considering the total cost of local area network installation, SYSTEM 7 can not only provide high bandwidth, but its cost is only half of that of multimode fiber.
On the other hand, the non-RJ type 7/F grade has functions that the optical fiber does not have. Since each pair of the non-RJ type 7/F level is individually shielded, the crosstalk between the pairs is greatly reduced, which allows the SYSTEM 7 to support voice, data, and video multimedia applications in the same cable. In the work area or telecommunications room, TERA has 1, 2, and 4 modular connection plug forms, which realize the direct connection of multiple application equipment ports in the same socket.
(3) Widely used
Since the non-RJ type seven wiring system uses double-shielded cables, it can meet the needs of those regions where shielded twisted-pair systems are mainly used, such as some European and Asian markets. The dual-shielding solution is mainly used in environments with severe electromagnetic interference, such as some broadcasting stations and radio stations. In addition, it can also be used in environments that require extremely low electromagnetic radiation for safety purposes. In addition, broadband smart communities and commercial buildings are also potential markets. The capacity of a Category 7 cable can meet the requirements of all twisted-pair cabling systems, including the replacement of coaxial cable, which is not restricted by the shared sheath, while enjoying high performance and low cost.
At present, Simon is ahead of other peers in the application of seven types of standards. According to Simon Company, Simon Company has created a new era in the commercial application of seven types of wiring. Simon’s TERATM breaks the shackles of the traditional 8-core modular RJ-type interface design and creates a brand-new structure. With incomparable performance and 1, 2 and 4 pairs of modular forms, from the limitations of the RJ-type interface Freed up, so that the transmission bandwidth of the seven categories reached 1.2 GHz. Simon’s SYSTEM7SM solution adopts TERATM connector, which can provide excellent transmission bandwidth, which far exceeds the transmission bandwidth of the current standard 600 MHz Category 7 standard. This capability enables some applications that require high bandwidth, such as broadband video applications up to 862 MHz, to run in Category 7/Class F cabling systems and use the same connection with other network applications. For example, it can support 3 kinds of mixed applications on a single seven types of channels (4 pairs of lines), and support voice, data, and broadband video multimedia applications at the same time.This new technology makes it possible to support all applications on twisted-pair cabling, including those that previously required optical fiber and coaxial transmission. The powerful noise immunity and extremely low external radiation performance of the seven types of systems make more advanced high-speed LANs do not require more expensive electronic equipment for complex coding and signal processing. The seven-category TERATM connector developed by Simon company provides continuous high-performance margin and linear frequency response up to 1 GHz, and the termination time is short, the volume is small, and the RJ type 8-core interface occupies the same space size.