TAILIEUCHUNG - strat_bk3

Tham khảo tài liệu 'strat_bk3', công nghệ thông tin, quản trị mạng phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 3 INSTALLATION PRACTICES FOR COMMERCIALWiring BUILDINGS Strategies for Voice and Data Systems (TIA-568-A COMPLIANCE) In addition to the installation practices for Residential and Light Commercial buildings in Book 2, the practices in BENEFITS OF TIA-568-A this section should be followed in order for a horizontal COMPLIANCE cabling installation in Commercial buildings to comply with TIA-568-A. Commercial building horizontal cabling that is installed in accordance with the TIA-568-A standard is like having one type of foundation that can support any type of IMPORTANT: Please read all warnings and structure that is built upon it—even if the structure keeps cautions on page 1-6. changing. The benefits are that you have one system which will: a) Simplify ongoing maintenance, relocation, and Scope: This Guide only covers horizontal cabling, not addition; backbone cabling. Backbone cabling for the MDF, IDF, Equipment Room and Telecommunications Closet is b) Accommodate future equipment and service beyond the scope of this document. This is due to the changes; fact that backbone cabling in TIA-568-A is very c) Accommodate a diversity of user applications, application and building specific, and dependent upon including voice, data, LAN, switching, and other the type of communications, type of building, and many building services. other issues. Thus for backbone and crossconnect design and installation the user is cautioned to refer to the TIA- 568-A standard document and if necessary, STAR TOPOLOGY communications consultants. But in general, the TIA-568-A specifies a star topology: a hierarchical specifications for backbone wiring are: series of distribution levels. In the backbone are the • a maximum of two levels main distribution frame (MDF) and the optional intermediate distribution frame (IDF). Only one IDF is • star topology allowed between the MDF and telecommunications • limited to 90 meters for Category-rated closet. 3BOOK applications; 800 meters for .

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