TAILIEUCHUNG - Cabling Standard - TIA-EIA Structured Cabling Standards

Tham khảo tài liệu 'cabling standard - tia-eia structured cabling standards', công nghệ thông tin, quản trị mạng phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | TIA/EIA Structured Cabling Standards In the mid-1980s, the TIA (Telecommunications Industry Association) and the EIA (Electronic Industries Association) began developing methods for cabling buildings, with the intent of developing a uniform wiring system that would support multivendor products and environments. In 1991, the TIA/EIA released the TIA/EIA 568 Commercial Building Telecommunication Cabling standard. Note that the ISO/IEC- 11801 Generic Customer Premises Cabling standard is an international cabling standard that is based on the ANSI/TIA/EIA-568 cabling standard. The TIA/EIA structured cabling standards define how to design, build, and manage a cabling system that is structured, meaning that the system is designed in blocks that have very specific performance characteristics. The blocks are integrated in a hierarchical manner to create a unified communication system. For example, workgroup LANs represent a block with lower-performance requirements than the backbone network block, which requires high-performance fiber-optic cable in most cases. The standard defines the use of fiber-optic cable (single and multimode), STP (shielded twisted pair) cable, and UTP (unshielded twisted pair) cable. The initial TIA/EIA 568 document was followed by several updates and addendums as outlined below. A major standard update was released in 2000 that incorporates previous changes. • TIA/EIA-568-A-1995 (Commercial Building Telecommunications Wiring Standards) Defines a standard for building cable system for commercial buildings that support data networks, voice, and video. It also defines the technical and performance criteria for cabling. • TIA/EIA-568-A updates (1998-1999) The TIA/EIA-568 was updated several times through this time period. Update A1 outlined propagation delay and delay skew parameters. Update A2 specified miscellaneous changes. Update A3 specified requirements for bundled and hybrid cables. Update A4 defined NEXT and return loss requirements for patch

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