The main construction feature of SCS
The main construction feature of SCS
Active and service equipment
The main construction feature of SCS is Its shaping to the construction geometry of the building and its organization, which Is independent of type and quantify of connected active and service equipment; which provides transmission audio, video and digital information. Cabling based on standards shall be used for creating foundation of information technologies, which are equipped with signal transmission type "voice-image data". System is based on symmetric transmission of digital information by four-paired 100 Ohm twisted-pair cable 5-th category, unscreened. User may choose cable mart, of different producers, which meet the requirements of standards and have serf if nation.
Choice is based on cost, components productivity and additional service. The main destination of the designed SCS is creation of the common cable space and switchpoinfs in the buildings of Multifunction complex. The purpose of SCS creation is satisfaction of objects organizational structure in the Uniform information system, which comply with contemporary standards on telecommunicational cable system of buildings. This system shall be ready to work, with new equipment under changes in the information technology. The main offered technology shall provide guarantee work in the cable system of the following enclosures:
Enclosure speed
Compliance of the design decisions with norms and rules
The technical decisions accepted in the equipment design, correspond to the requirements of ecological, sanitary - hygienic, fire-prevention and other norms working in territory of Russian Federation, and provide safe for life of the people operation of object at observance of the measures, stipulated by working drawings.
Basic data
basic data for this design were used:
- Requirements specification approve by Customer
- Rooms planning
- Rooms explication
Main technology
Compliance assurance of designed SCS with just listed standards becomes choice of high-reliability materials and components made by key world producer "Lucent Technologies" and considerable practical experience in the designing of the analogous cable systems of company. The using of the following equipment and materials are foreseen included in the SCS:
- Plastic electro technical boxes (surface indoors)
- Metal cable trays
- Switching and data terminal equipment "Systemax"
- Cable-distribution equipment "Systemax"
- Cable production "Systemax"
- Installation and measuring equipment "HARRIS DRACON DIVISION'. "FLORE". AMP incorporation, 'DATАСОМ TECNOLOCIES'
Structured cable system
The main construction feature of SCS is its snapping to the construction geometry of the building and its organization, which is independent of type and quantify of connected active and service equipment, SCS provides transmission of audio, video and digital information. Using of common cable space and swifchpoinfs for different low current systems creates considerable mobility during cable system maintenance.
SCS includes:
1. MC-Main Cross-connect
2. HE -Horizontal Cross-connect
3. CT-Cable Trey
4. TE_-Tel.ecommunica.fion Closet
5. Telecommunication sockets/ connectors
6. infernal feeder cables
7. Horizontal cables
Horizontal cable subsystem
Horizontal cable subsystem begins with telecommunication socket on a work place and ends with HC in the telecommunication room, if includes socket, HE, connection points on keyboards, keyboards and patch-cords. Total cross patching bulkhead length in cross means and patch-cords shall not precede 5 m. Horizontal cabling from HE to each telecommunication socket shall be performed by four-paired cable type twisted-pair, which characteristic correspond 5fh category: Alt cables get from telecommunication sockets connects to 24 or 48 port patch-panels produced by Lucent technologies".
Each horizontal cable shall be marked in two places:
1. In telecommunication socket connection point
2. In ТЕ in patch-panel connection point
For horizontal cabling shall be used cables, which comply with the following requirements:
3. Producer shall have ISO 9001, ISO 9002 certifications
4. Fable shad corresponds environmental conditions
5. Fable shall corresponds ANSI/TIA/EIA-568-A and ISO/EC 801 standards
Cable 5fh category is chosen for all horizontal distribution system with purpose to receive flexible and universal, cable infrastructure, which may progressive Customer requirements.
Main cable subsystem
Main cable subsystem provides connection of telecommunication rooms and consists of main copper and optical cables, intermediate and main cross, cable connection points, and cross patching bulkhead, patch-cords, which are used for main's segments commutation. Main topological configuration is "hierarchical star".
Type and quantify of main cable's pairs and fibers were chosen according to the following numbers:
6 fibers for each HC in the six floor building 8 fibers for each HC in the nine floor building
1 twisted pair high-capacity cable 5rd category on each telecommunication socket provided for telephone connection.
Quantify of telecommunication sockets were calculated starting from 1 socket per 8 qm on "Shell and Core" stage. MC locates in server on the 1st floor of the nine floors building in room 1122. High-capacity copper cables provided for transmission of low-speed enclosures are connected to the cross-panels type I/O and capacity from 100 to 500 pairs for the most effective use of its capacity.
For main cabling shall be used cables, which comply with the following requirements:
6. Producer shall have ISO 900i, ISO 9002 certifications
7. Cable shall corresponds environmental conditions
8. Cable shall, corresponds ANSI/TIA/EIA-568-A and ISO/lEC П801 standards
Work place subsystem
Work place is interface between horizontal cable system and end-consumer's active equipment. All facility (adapters, splitters and etc.) for concrete enclosures installs outside concerning telecommunication socket. Work, place has one dual-port socket for user's connection to SCS. For work station connection each socket on the work place complete with hard wire length 2m reinforced on each end by 8-posifion module plugs (type RJ45). Alt 4-pair UTP cables connect to the 8-posifion module plug installed on the work place. Connection of module telecommunication sockets are performed by version T568B by means of special printed tool. Reserve cable length not less than 500mm provides on the work place. For telecommunication ends the sockets with cutoff points are provided on the work places.
Subsystem of telecommunication boards
Criteria at a choice of a location of telecommunication boards were:
The minimal lengths of horizontal cables;
The minimal, distance up to vertical shafts;
The maximum possible served area of a building.
As a structure for accommodation of the switching equipment to use:
MC-19 floor mounted with glass doors manufactures SPAS (Poland);
HC-19 wait mounted 5 section boards manufactures ZPAS (Poland).
Recommendations on the equipment of telecommunication boards. During installation of telecommunication boards if is recommended to observe following recommendations. Boards are intended for telecommunication functions and auxiliary systems. The Equipment which is not having the relations to support of functioning of a telecommunication board, such as pipelines, the wafer drain and distributive systems of power supplies of a building cannot locate in a telecommunication board or pass through if.
Don't locate the Telecommunication in one room with auxiliary services of a building which can prevent to job of telecommunication systems. Don't use the Telecommunication board for storage of economic stock intended for its service. the Network of grounding Each telecommunication board should be necessarily earthed according to PUE.
Requirements to cable lines
Designing cable lines according to the international cable standards, a manual on installation SOS' and methods of construction of telecommunication distributive systems. in system of cable lines allocate following subsystems:
Cable lines for a lining of the main cables;
Cable lines for a lining of horizontal cables including:
8. cable lines in corridors;
9. cable lines in rooms.
Types of cable lines, their section and a design got out in view of performance of following requirements:
Cable lines, are designed and must be installed according to local both national norms and rules (PUE, S'NiP 5.05.06-85);
Lines inside of a building have a topology configuration "star";
For ail metal segments of cable lines to provide protective grounding;
installation of fire-prevention barrier in passes of cable lines through wails, partitions (use of fire-resistant mastic with a. limit of fire resistance not less a. limit of fire resistance of walls) is stipulated;
Support of cable lines is provided with the means structurally independent of a false ceiling and its fixture; insfail devices of support of cable not further Дм from each other;
Filling of the cable frays must be not more 40%, as horizontal and vertical;
Horizontal cable lines
The Project provides for a lining of cables on rooms to use the punched cable frays in width from 100 up to BOO mm,, and height from 50 up to 60mm., with an opportunity of a. lining as in the middle of a room with fastening to a. ceiling, and along walls with fastening to a wall. At pass of a cable line along electrical rooms or of crossing of line of a power cables, the cable fray is completed with a shielding cover for exception of electromagnetic fields on qualify of SCS work. Each section of cable frays is connected through flexible taps to the bar of grounding (an electric cable by section not less than 4 mm.)
Testing
After installation of the Structured Cable System procedure of testing of horizontal cable segments on conformity of a. category 5e on model, of a. base line and procedure of testing of fiber-optical cables is stipulated. The testings on each cable segment are given to the Customer in an electronic version (COMPACT DISC).
Notes
- Lay cables info the low current cable frays and PVC pipes д=20мм. Fix pipes every 0,5m with dips.
- Mark cables according to them function.
Install steel sleeves Ф50 in the places, where cables are crossing walls and floors. At the end of the installation don't test the cables to the sockets 1.25, 1.22. the length of these cables is more than recommended length by the standards. Height of the sockets installation is 500mm from the floor level, if their level is not shown on the drawings.