Designation of the patch panel in the diagram. Campus backbone subsystem

2.1. Structured cabling system (SCS) is a complete set of cables, cable components and switching devices.
2.2. A digital channel is a data transmission path between active network equipment.
2.3. A permanent line is a data transmission path between two connectors of one cable.
2.4. Port is a switching unit of SCS.
2.5. A telecommunications socket is a connecting device with 1-2 ports, located at the workplace or at the installation site of terminal equipment.
2.6. Cross panel is a multiport passive connecting device.
2.7. Knot working group – place of cable consolidation or switching digital channels, coming from telecommunication sockets.
2.8. Floor node– place of switching of permanent lines or digital channels coming from workgroup nodes.
2.9. - place of switching of permanent lines or digital channels coming from floor nodes.
2.10. Demarcation point is a place for placing switching equipment of external networks and equipment of telecom operators.
2.11. The horizontal subsystem is part of the SCS from the outlet at the workplace to floor unit.
2.12. The main subsystem of the building is part of the SCS from floor units before .
2.13. Campus backbone subsystem - external optical networks ending at the demarcation point or at .

3.0. Principles of SCS organization.

3.1. SCS (see topological diagram on the right) is a strictly ordered set of cables, cable components and switching devices, including:

- (connects distribution node of the building and floor nodes );

- (connects floor nodes with workgroup nodes, A workgroup nodes - With telecommunication sockets).

3.2. One uh tag unitserves its own floor and two adjacent floors.

3.3. One workgroup node supports up to 96 ports (48 telecommunication sockets with two ports).

4.0. SCS structure.

4.1. The figure below (in the Compliance... section) shows hierarchical structure of the building's cable system according to the standardwith reference to ISO/IEC 11801 and ANSI/TIA/EIA-568.

5.0. Compliance with OSSIRIUS SCS 702 R Russian GOST R 53246-2008 and international standards ISO/IEC 11801 and ANSI/TIA/EIA-568.

5.1. GOST R 53246-2008 was developed on the basis of “our own authentic translation of standards" (see page II) ISO/IEC 11801 and ANSI/TIA/EIA-568. OSSIRIUS SCS 702 is fully within the framework of these same international standards.

5.2. Those provisions of GOST R 53246-2008 that set any restrictions in OSSIRIUS SCS 702 are noted in the corresponding Notes.

5.3. The main designations adopted in OSSIRIUS SCS 702 correspond to the following designations according to GOST R 53246-200 8 (page 5).

The distribution center of the building is MS.

6.0. Compliance of OSSIRIUS SCS 702 with the principles of LAN design.

6.1. The main and most important application for SCS is a local area network (LAN). Based onfrom this the OSSIRIUS SCS 702 standard definesSCS as an accessory to a LAN .

6.2. When designing SCS according to the OSSIRIUS SCS 702 standard, you should take into account and understand the principles of the LAN design and its division into the following levels (see figure on the right):

1. Access level(Access Layer).

At this level setare beingL2-workgroup switches . INOSSIRIUS SCS 702 dos levelstupid corresponds to the levelworkgroup nodes .

2. Distribution level(Distribution Layer).

At this level it is establishedL3-switches connectingworkgroup switches with a network core switch. In OSSIRIUS SCS 702this level corresponds to the levelfloor nodes.

3. Kernel level(Core Layer).

At this level onceplaced L2 or L3-network core switch, being the center of the LAN. The network core switch aggregates traffic from the switchdistribution levelI.In OSSIRIUS SCS 702, the LAN core level corresponds to thedistribution center of the building .

4. Level server switches (Server Farm).

The server switch is located in the server cabinet and communicates directly with the core switch. This is due to the fact that most management systems (ERP, CRM, etc.) are based on the “ client-server" (they are not distributed), which, in turn, determines high requirements for network performance and server availability.

To connect the core switch and server switches between and server cabinet are organizedpermanent lines, the number of which is set with a reserve for the development and aggregation of channels.

5. Demarcation point(Demarcation Point).

To protect the LAN from external influences, it is organized demarcation point , where the equipment that supports the operation of external networks and active equipment of telecom operators is located.

Between distribution center of the building Anddemarcation point are being organizedpermanent lines, the number of which is set with a reserve, for development and for new telecom operators.
6.3. The rules for constructing a LAN allow for the merging of adjacent levels. Taking this into account:

6.3.a. Among others, core switches are produced with a basket for installing distribution and access level expansion cards. Installing such a switch in a compact wall cabinet is difficult, therefore, if there is a justified need, namely, at the categorical request of the customer, at the level of the distribution node of the building it is allowed to place the core switch in a floor cabinet;

6.3.b. If at one of the SCS levels the total estimated number of switch ports is less than the unoccupied design capacity of switch ports at the next level, it is allowed to combine adjacent SCS levels;

6.3.c. Partial combination of SCS levels is not allowed.

6.4. In SCS nodes according to the OSSIRIUS SCS 702 standard, it is possible to install network switches vertically, with ports down. When choosing a specific switch model, you should check whether this installation option is provided by the manufacturer.

7 .0 Horizontal subsystem.

7.1. Conditional chain of elementshorizontal subsystemin OSSIRIUS SCS 702 (figure below) contains three switching points -floor node, work group node and port telecommunications outlet.

7.2. When passively switching cross-panel ports in workgroup node total length of organizedpermanent line subsystems are limited to 92 meters.

7.3. When organizing digital channelwith the help of active equipment, the length of each section can be up to 92 meters (fromfloor unit before workgroup node and from workgroup node to the data port).

7.4. Note. According to paragraphs. 5.1. 2 GOST R 53246-2008 length permanent lineshould not exceed 90 meters.10 meters are allocated for hardware and patch cords, which is too much for the small size of wall cabinets.

7.5. The SCS designer should take into account that a deviation of the cable operating temperature by 25°C from the normal temperature (usually it is equal to room temperature, 20°C) leads to a deterioration in its characteristics by 10% and a reduction in the maximum length permanent line(or plot digital channel) by 9.2 meters.

7.6. To build a horizontal cable subsystem, unshielded UTP cables are used. In this case, hardware cords (patch cords) and cables in telecommunication sockets are cut according to option “B” (T568B).

When cutting a UTP cable in a socket, you should strive for the minimum development of pairs of conductors and the shortest length of conductors without a cable sheath. The cable should be secured in the socket solely by its sheath.

7.7. Note. Connecting active equipment directly toworkgroup node , as to a consolidation point, is prohibited according to clause 3.4.1.1GOST R 53246-2008. Cables coming fromworkgroup node to workplaces or to terminal devices must necessarily terminatetelecomnic sockets.

8.0. Trunk subsystem of the building.

8.1. The main task subsystem combinesfloor units With distribution center of the building .

8.2. To organize the backbone subsystem, shielded FTP cables (STP, SFTP) are used.*

8.3. The use of shielded cables requires potential equalization of the signal grounds. For this:

8.3.a. Equipment power supply floor unitscarried out from one shield located in close proximity todistribution center of the building, a p OEach node is connected using a separate cable;

8.3.b. According to the radial potential equalization scheme (GOST 50571.21), from distribution center of the building to everyone floor unitcopper wires are laid in a yellow-green insulating sheath with a cross-section of at least 4 mm 2 , connecting the signal grounds of the equipment cabinets.

8.4. Length of cables of the building's backbone subsystem should not exceed 92 meters. In cases where SCS is built in buildings with a height or length that requires a greater length of main cables, the building is divided into sectors equipped with separatedistribution nodes of the building .

8.5. The cutting of the cables of the main subsystem of the building is carried out according to option "B" (T568B), similar to the cutting of the cables of the horizontal subsystem - clause 7.6.

* FTP - foil screen, STP - wicker screen, SFTP - combined screen.

9.0. Campus backbone subsystem.

9.1. For organizationSingle-mode optical cables are used.

9.2. Campus backbone subsystemends atdemarcation point or in distribution center of the building on the optical cross panel.

9.3. To connect the optical cross-panel with the data transfer converter, it is recommended to use connectors and connecting e cords are SC type.

9.4. The connection of the optical cable to the port of the optical cross-panel is carried out by welding.

10.0. Arrangement of SCS nodes.

10.1. To organize SCS nodes according to the OSSIRIUS SCS 702 standard, any compact wall cabinets are suitable, allowing you to simultaneously place 1-2 switches, a cross-panel and an uninterruptible power supply.

10.2. To organize SCS nodes with a high density of ports (with small dimensions), wall-mounted cabinets OSSIRIUS SCS 702-1 have been developed (figure below), the design and layout of which are an integral part of the OSSIRIUS SCS 702 standard.

10.3. The OSSIRIUS SCS 702 standard allows installation infloor units And workgroup nodes network switches without intermediate cross-panels. For this purpose, OSSIRIUS SCS 702-1 cabinets are designed in such a way that in their lower part there is space for laying the ends of UTP cables in half rings (figure below).

This significantly simplifies and reduces the cost of SCS, while removing any restrictions associated with the categories of SCS switching components (these components simply do not exist).

10.4. When using the OSSIRIUS SCS 702-1 cabinet in workgroup nodes it is possible to install two 48-port switches (figure below, For clarity, the switches in the figure are turned upside down). Thus, one node can serve 96 ports. For installation in a cabinet of switches that do not allow the ears to turn, special universal mounts are produced.

10.5. Building distribution center (image below) should contain a cross-panel linked to a cross-paneldemarcation points , if the latter is provided for in the SCS. It is also possible to install a cross-panel for communication with the cross-panel (panels) of the truss (trusses)faiths, categories, respectivelymeeting network performance requirements.

10.5.a. When you remove a server farm fromdistribution center of the building more than 30-35 meters; to communicate the latter, it is advisable to use a shielded cable and appropriate cross-panels.

10.5.b. When using shielded cables (according to clause 10.5.a), it is necessary to ensure potential equalization of signal grounds.

10.5.v. If necessary, distribution center of the building you can use one cross-panel to communicate with both the demarcation point and the workgroup nodes.

10.6. IN demarcation pointIt is possible to install a variety of equipment, including those that do not have any fastenings.

10.6.a. For installation of IDC 110 or Krone type plinths, lowering can be used achingshelf (picture below).

10.6.b. To install equipment without mounting, a horizontal shelf can be used (picture below).

10.6.v. It is possible to install the equipment on a DIN 35 rail using a vertical shelf (picture below).

10.6. To organize, for example, an access server, the SCS 702-25 chassis can be used (figure below).

10.6.d. To install non-standard equipment, special mounts can be developed and manufactured. Below is an example of a shelf with mounts for an IP controller.

10.7. To protect equipment from overheating, the OSSIRIUS SCS 702-1 cabinet has space for a fan (picture below), and to protect it from dust, there is space for a filter.

10.8. When installing OSSIRIUS SCS 702-1 in an unguarded area, in addition to the standard lock, the cabinet can be equipped with an anti-vandal lock (figure below).

11.0. Standard for redundancy of sockets/ports in SCS.

11.1. Construction of SCS according to the OSSIRIUS SCS 702 standard involves installation on each conditional workplace at least one socket with two ports. In this case, one port of the socket (odd, left or top) is initially allocated for LAN, and the second (even, right or bottom) is for telephony, but each of them can be both, depending on the real needs of SCS users.

11.2. The calculation of the required number of sockets in the SCS is made based on the area of ​​the room (typical value - 1 socket per 10 sq.m.), the linear length of the walls (typical value - 1 socket per 1.5 meters of wall), or the actually required number of workplaces and the specified reserve ( typical value - 30%).

11.3. Premises that were not initially intended to accommodate a large number of workplaces can be equipped with a significantly smaller number of sockets than those provided for in clause 11.2, but at the same time there should be located in close proximity to them workgroup nodes . So that when re-equipping/repurposing premises there is no need to organize new long cable routes.

11.4. When designing workgroup nodes located in low-density office environments, 25% of the switch ports should be left unoccupied.

11.5. To increase the density of Ethernet ports, area-mounted (or on-site) ports can be used. telecommunications outlets.

11.6. When designing SCS, in addition to sockets at workplaces, it is necessary to install sockets for various terminal and additional office equipment in those places where the latter are most likely to be located. In corners and niches of office premises - for network printers, faxes and MFPs. In the corners from the windows and on the walls opposite the entrance, in the ceiling area - for video cameras. In the area of ​​doorways - for access control equipment (ACS). In open space centers - for wireless access points.

12.0. IP telephony and IP video surveillance in SCS.

12.1. The OSSIRIUS SCS 702 standard was developed taking into account the fact that almost the entire telecommunications space of a modern building is occupied by Ethernet. At the same time, any IT applications can operate within a LAN built using Ethernet technology, including IP telephony and IP video surveillance.

12.2. When building IP telephony and IP video surveillance in SCS, there are a number of points that must be taken into account, namely:

12.2.a. IP cameras are placed significantly above the installation level of telecommunication sockets of workplaces. To install an IP video camera in the workplace area, you can use a mini-box (see figure below), or at the design stage, additional sockets for IP cameras should be installed in the ceiling area;

The figure above shows an example when the workstation socket port module is recessed inside the box (it can also be recessed into the socket block), and a video camera is connected to it with a hardware cord. The standard power cable will be pulled from the power supply through the vacated port window to the video camera. As a result, the camera's power cable and hardware cord are neatly covered with a miniature cable channel;

12.2.b. IP cameras and IP phones require uninterrupted (redundant and independent from other applications) power supply. To ensure this, sources should be placed in the SCS nodes uninterruptible power supply, and in workgroup nodes – PoE switches (shown below on the left conditional diagram connecting IP cameras and IP phones and their power supply from a PoE switch, and on the right is an example of a diagram for connecting a phone to an SCS with switches without PoE, via a PoE injector and without power backup). It is also allowed to install one uninterruptible power supply of sufficient power in the areadistribution center of the building and power supply from it to all SCS nodes;

Cameras that do not support PoE, can be connected viaPoE splitters (picture below).

13.0. Analog/digital telephony (NOT IP) in SCS.

13.1. Modern digital telephony is not inferior to IP telephony in terms of communication quality and number of service functions, and analog telephony beats IP telephony in price. This makes possible the long-term presence of non-IP telephony in the telecommunications equipment market. Therefore, the OSSIRIUS SCS 702 standard provides support for analog and digital telephony(see picture on the right).

13.2. To support NOT IP telephony in workgroup nodes standard ones are installed(8С8P) cross-panels (Т568, for RJ45 switching"), connected by multi-pair cables to telephone cross-panels (IDC110, Krone) of a separate cabinet (telephone cross-panel),which also houses telephone cross-panels connectedfrom a private PBXamphenol cables (with TELCO connectors).

L The lines coming from the telecommunications outlets are connected either to the network switch or to the cross-panel.

As a result, by connecting withThe corresponding pairs of telephone cross-panels, located in a separate cabinet (telephone cross-panel), can connect specific workstation ports to specific PBX lines.

13.3. Initially, in the absence of other requirements, in workgroup node every second port of telecommunication sockets is connected to a cross-panel, and every first port is connected to a network switch.

13.4. When switching to IP telephony inworkgroup nodes additional network switches are installed to which lines previously connected to cross-panels are switched.

13.5. For support system phones operating on 2 pairs of conductors, a cross-panel cutting scheme can be used workgroup node , given below, allowing you to get bywithout doubling the number of pairs in the cable.

14.0. Cable channels.

14.1. When installing cable routes in an industrial room, under a suspended ceiling and in the equipment room, wire trays should be used (figure below). Thanks to the Faraday cage effect, wire trays significantly reduce the impact of electromagnetic interference on cables.

14.2. To organize cable routes in the area of ​​workplaces, plastic boxes (cable ducts) and corresponding accessories can be used (figure below).

14.3. The best coefficient of permissible cable filling (up to 0.7 (70%)) is provided by plastic mini boxes with sockets mounted in installation boxes from the outside (picture below, two pictures on the left). In boxes with built-in sockets, the permissible cable filling factor is 0.4 (40%).

14.4. In rooms where non-stationary workstations are located in a large open area, it is reasonable to place cable routes in the space under the floor. Cable routes organized under the floor are constructed using grounded wire or metal closed trays. The use of grounded trays is explained by the possibility of static voltage draining from the raised floor.

In this case, information sockets are placed in special service blocks mounted directly in the raised floor panel or in service racks (figures below).

14.5. In rooms without partition walls, service racks can be used in combination with a cable route placed above the suspended ceiling (picture above and to the right).

14.6. The OSSIRIUS SCS 702 standard does not provide for the organization of cable routes covered with a concrete floor screed.

14.7. Hardware cords - connecting the data port and equipment at the workplace - found in the aisle can be covered with a floor box (picture below).

Using a floor box to organize a cable route horizontal or backbone subsystems not allowed!

14.8. To eliminate cross-talk between cables, UTP cables in cable channels are laid randomly (not in parallel).

14.9. Wiring of cables with winding is not permitted.

15.0. Internal conduits, external conduits and urban input.

15.1. Into the aisles cable channels metal pipes - conduits (bank of conduits, figure below) are laid through the walls and interfloor ceilings. The spaces between the pipes are filled with a material corresponding to the material of the walls and ceilings (for example, they are concreted). The edges of the pipe ends are rounded. The distance between the pipes should be 0.75 of their diameter.

15.2. Optical cablecampus backbone subsystemis inserted through an external conduit and laid todemarcation points or distribution center of the building without any intermediate devices. In this case, a 3-5 meter supply of cable is made in the form of rings. Below are ways to enter cables into a building using different external conduits.

15.3. Passage of walls and installation of conduitsTrequires approval from the person responsible for the fire safety of the building (in some cases it is necessary to install fire barriers) and with the building designers (damage to the reliability of the building structure should be avoided).

15.4. For placement of equipment (switching nodes, couplings, cable reserves, lightning protection, etc.) for operators of external applications, at the border of SCSA special territory is being created - the city entrance (Entrance Facility). This can be a place on the wall or a separate room.

15.5. Urban input is organized above ground level, in a room with a normal environment and room temperature, isolated from water supply, sewerage and heating systems. A demarcation point is located on the territory of the city entrance, if the latter is provided for in the SCS.

16.0. Working and executive documentation. Symbols in SCS.

16.1. Detailed documentation is completed before installation work begins.

16.2. The working documentation must contain: a) diagrams of the premises, indicating the locations of telecommunication sockets, cable routes and conduits; b) diagrams of the organization of cable routes of the building as a whole; c) layout of equipment in SCS nodes; d) a complete list of installed equipment and consumables (specification); blank cable log tables and connection tables (for notes).

16.3. Working documentation schemes must be exhaustively complete. References to other documents, including technical task, any standards, separate explications of premises, orders, etc.

16.4. The design of working documentation (frames, stamps, information about the developer, style elements) should not affect the ease of use of it. Schemes of working documentation should occupy the maximum part of the sheet area.

16.5. If possible, working documentation diagrams should be divided into A4 sheets so that they contain information related to a specific stage of work in a specific area.

16.6. Below are the accepted OSSIRIUS SCS 702 conditional designations.

16.7. To carry out the As-built documentation, changes are made to the Working Documentation upon completion of the work, and tables of the cable log and connections are drawn up for finishing. The resulting material is filed in a folder (several folders) along with:

Title page;
- Explanatory note;
- List of documents and materials;
- Descriptions of installed active equipment, operating instructions, passports;
- CD/DVD media with drivers and software for active equipment;
- CD/DVD media containing electronic versions all documents of executive documentation.
- SKS Certificate;

16.8. The explanatory note of the Executive documentation must contain a description SCS and links to documents that determined the key points of its design (TOR, requirements, corporate standards, etc.).

17.0. Marking of cables and SCS equipment.

17.1. The OSSIRIUS SCS 702 standard allows simplified marking (for a single node system) indicating only the workplace number and full marking indicating the cable destination (two digits for the cabinet number, one digit for the switch/device number, and two digits for the port number).

17.2. Cable markings are made from left to right from each end of the cable, as well as in the places where the main groups of cables are separated (pictures below).

17.3. When marking a cable laid between nodes, the destination for the ports of both nodes is indicated. When marking an aggregated cable and groups of cables, the ports with the lowest number are indicated (picture below). A node that is higher in the hierarchical structure is marked with the letter “M”.

18.0. Cable logs and connection tables.

18.1. For each 1st SCS nodea separate cable log is created containing comprehensive information about all the cables included in it. A fragment of such a log is given below.

Port, Group	Cabinet (panel) No. 21, Location: room 323 (Working Group Node)
	Cable marking	Cable purpose			Cable type, length
		Room, Wardrobe	Socket/Device	Port (group), couples
Device No. 3 (Cross Panel 568)
	21301
	21302
	21303
	21319
	21324 M31711	Floor unit, M31
Device No. 4 (220V socket block)
	21401 M32406

18.2. Data about each connection inside the cabinet is entered into the connection table (see below). Each patch cord is assigned a number containing the number of the device being switched (the device with the lower number is selected from the two devices) and the enabled port number of this device. The node number is discarded (for example, the patch cord connecting port #12 of the 3rd device to port #24 of the 0th device is designated “024”).

Connective cord	Device to be connected with a lower number			Device to be connected with the highest number
		Port, couples	Port assignment	Port assignment		Port, couples
			room, 324, socket 21301	network switch
			room, 324, socket 21302	network switch
			room, 324, socket 21303	network switch

19.0. SKS certificate.

19.1. The quality of SCS installation and accuracy of adherence to the OSSIRIUS SCS 702 standard is certified by SKS certificate.

20.0. Service life of SCS.

20.1. The warranty period for the certified SCS is 10 years.

20.2. The average service life of SCS, ascompletedobject (before modernization) - 5 years.

20.3. The maximum estimated service life of components used in SCS is 20 years.

.

Today it is accepted in the world TIA/EIA-606-B standard for SCS, which stipulates the mandatory requirement for marking system components: cables, patch panels, workstations (modules), cabinets, cross-connect equipment. Since the use of markings significantly simplifies not only installation, but also the daily tasks of administering the cable system.

Requirements for SCS marking are described in paragraphs 9.6.3 and 9.8 of GOST R 53246-2008 where it says that all markers must be printed on mechanical device, are clearly distinguishable and securely fastened in place throughout the entire service life of the system (15–20 years or more).

We would like to note that so far in most cases there is no marking at all, and in other cases There are markings made “by hand” on short-lived materials using household writing utensils. The consequence of using this marking technology is the lack of unambiguous identification (readability) of information during operation and maintenance of equipment.

The lack of correct marking inevitably leads to difficulties in scaling, administering and reorganizing the communication network. Confusion arises, complicating the work of personnel maintaining the cable system, and increasing the time required to identify and eliminate faults in the system. And the company’s budget suffers monetary losses due to equipment downtime.

But, there are solutions for creating high-quality markings according to the European standard TIA/EIA-606-B and Russian GOST R 53246-2008, offered by Brady Corporation, based on thermal transfer printing technology on polymer materials for various operating conditions. Namely, using the capabilities of thermal transfer printers is the most effective way creating durable and wear-resistant marking labels.

Thermal transfer printing technology is that the ink composition from the ribbon (ink ribbon) is transferred to the label material using instantaneous spot heating of the ribbon at the points of contact with the material. The inscriptions applied in this way are especially resistant to external factors and do not fade or wear off.

As part of solving the problems of marking and administering SCS systems in accordance with GOST R 53246-2008 and the TIA/EIA-606-B standard, BRADY offers a new portable thermal transfer printer BMP 21-PLUS. A universal, small-sized device that performs a full range of tasks for marking electrical and telecommunications equipment, equipment for data processing and transmission systems, in production, in laboratories, as well as in the office and at home.

Fully Russified. It has comfortable ergonomics and a particularly durable design: cartridges with the “Insert, lock, print” system, protective rubber shock absorbers on the body, and screen backlighting. All this provides all the conditions for fast and comfortable work.

But the main thing is in the printer BMP 21-PLUS the fact that this is the only device on the Russian market with which you can create markings for the entire SCS system according to the TIA/EIA-606-B standard and GOST thanks to a new expanded color palette and new sizes of marking materials. The color palette of the labels includes all the colors prescribed by the SKS standard (purple, yellow, brown, red, etc.). And the new material size of 6mm allows you to accurately and accurately create patch panel markings. Besides, new printer has the ability to mark cables of all categories used during the installation of SCS (including categories cat5, cat 5e, cat6, multi-pair and optical cables).

Also, using this portable printer you can mark: power supply systems; active equipment; telecommunications premises and telephone lines.

Printer BRADY BMP 21-PLUS Prints at a resolution of 203 dpi, which allows you to vary the font size without losing the clarity of the printed characters. This is especially useful when you need to fit a long an identification number into a small field.

In addition, the printer has useful function serial printing. It is enough to specify the necessary parameters so that it quickly prints the required number of markers in compliance with the logical sequence you specify. Minimum size font size is 6 pixels.

Printer BMP21-PLUS provides complete freedom of action. Allows you to select materials for labels in accordance with the external conditions in which they will be used, as well as the color code required by GOST.

On a portable printer BRADY BMP21-PLUS you will create markings that will last for years and provide quick and easy system identification.

Any SCS includes tens of thousands different components. Construction local networks and structured systems is complicated by the huge number of individual elements and devices on the basis of which they are created. To prevent system management from turning into chaos, visual and unique markings of individual groups of components are used.

It is difficult to accurately calculate the cost to a company from downtime during testing and repair of SCS, when an engineer “blindly” tries to find a damaged cable. Installation of SCS and LAN can be significantly improved with the help of clear segmentation and separation of all elements and parts used.

To simplify orientation in the cable industry, an international system of marking individual parts of the cable network is used, which is an “international language” that allows you to quickly navigate the structured cable network

General requirements to the marking of SCS elements are formulated in the current TIA/EIA-606 standard, which describes in detail the groups of network components accepted for indexing: cables, cross-connect equipment, cords and sockets, permanent connectors, trays, boxes and grounding elements.

According to the standard, the marking component must comply with the requirements of the UL969 test, namely, it must have a field for writing inscriptions of a certain length and color. Marked components can be various types and size, have high mechanical strength and resistance to environmental influences. The classification of cable network marking elements used is quite simple. Marked cables installed at the stage of creating SCS are called technological elements.

Markers used already during the operation of the cable network are called finishing markers. The lack of final markings complicates the network management process, so the cable system is not put into operation without the marking and identification process. There are standard marking elements that are included in the delivery of many SCS solutions, for example, panels or sockets.

In modern structured cabling networks, various types of additional tags, which are produced by specialized companies, are widely used. Additional tags come in a variety of colors and good quality execution, which allows you to identify individual links and functional blocks of the enterprise cable system.

The most popular and widespread marking element today is adhesive labels, which are used as elements of technological and finishing markings. Labels are used to identify various components of SCS: cable and switching equipment, boxes, cabinets, grounding plates.

SCS structure

Structured Cabling System (SCS) should consist of any or all of the following subsystems:

These subsystems include the following functional elements:

• Main Distribution Point (MDP)
• Territory backbone cable
• Building Distribution Point (RPB)
• Building trunk cable
• Floor Distribution Point (DPE)
• Horizontal cable
• Transition point (TP)
• Telecommunications Connector (TP)

Horizontal subsystem

The horizontal subsystem is part of the telecommunications cabling system that runs between the telecommunications receptacle/connector in the workplace and the horizontal cross-connect in the telecommunications closet. It consists of horizontal cables and that part of the horizontal cross-connect in the telecommunications cabinet that serves the horizontal cable. It is recommended that each floor of the building be served by its own Horizontal subsystem.

All horizontal cables, regardless of the type of transmission medium, should not exceed 90 m in the area from the telecommunications outlet at the workplace to the horizontal cross-connect. At least two horizontal cables must be laid for each workplace.

For voice and data applications, four-pair UTP/ScTP and fiber optic cables must be routed in a star topology from the telecommunications closet on each floor to each individual data outlet. All cable routes must be agreed upon with the customer before cable laying begins.

Each UTP/ScTP cable segment between the horizontal part of the cross-connect in the telecommunications cabinet and the information socket must not contain couplings.

Trunk subsystem

The cable route inside the building connecting cabinet to cabinet or to the equipment room is called the backbone subsystem of the building, connecting the main cross-connect in the equipment room with intermediate cross-connects (IC) and horizontal cross-connects in telecommunication cabinets (TC). It consists of a medium in which information is transmitted along the highway between these points, and the corresponding switching equipment that terminates this type of medium.

The backbone subsystem must include a cable installed vertically between floor telecommunication cabinets, the main or intermediate distributions in a multi-story building, as well as a cable installed horizontally between telecommunication cabinets, the main or intermediate distributions in an extended one-story building.

All vehicles must have adequate cross-sectional area of ​​the main route available or available for reuse so that additional routes are not required. All routes, if intended for use in telecommunications systems, must have fire stops, regardless of whether the routes are used or not.

Trunk cables should be laid topologically in a star pattern, starting at the main distribution cable and running to each telecommunications cabinet. Between the main and horizontal crosses there may be an intermediate cross. Such a system is called a hierarchical star topology.

All telecommunications cabling systems and equipment must be grounded in accordance with relevant codes and regulations.

Highways between buildings

When a distribution system spans more than one building, the components that provide communication between buildings constitute the Interbuilding Backbone Subsystem. This subsystem includes the medium through which trunk signals are transmitted, the corresponding switching equipment intended for termination of this type environment, and electrical protection devices to suppress hazardous voltages when the environment is exposed to lightning and/or high-voltage electricity, the peaks of which may penetrate the cable inside the building. Typically this is a first-level backbone cable running from the main cross-connect in the equipment room of the central building to the intermediate cross-connect in the equipment room of the peripheral building.

The backbone subsystem shall include cable laid between buildings, in a tunnel, buried directly in the ground, or any combination of these methods, and extending from the main distribution to the intermediate distribution in a multi-building system. The backbone cables must be installed in a star topology, based on the main cross-connect to each telecommunications cabinet in the peripheral building. All cables between buildings must be installed in accordance with the requirements of relevant regulations.

Workplace subsystem

This subsystem provides connection between the information socket (telecommunications connector) and active device(computer/phone). The subsystem defines the requirements for hardware cords and telecommunication sockets at the user's workplace.

Telecommunications sockets are located on the wall, floor or any other area of ​​the workplace. It all depends on the design of the building. When designing a cabling system, telecommunications connectors should be placed in easily accessible places. High connector density increases system flexibility with respect to changes. In many countries, connectors are installed at the rate of two connectors for a minimum of 6 sq. m. and maximum 10 sq. m. working area. Connectors can be installed either individually or in a group, but each workstation must be equipped with at least two connectors.

Each telecommunications connector must be marked with a permanent label that is clearly visible to the user. You should pay attention to the marking of each duplex pair: all changes in marking must be recorded in the documentation.

Placing a hardware room or telecommunications cabinet

The hardware room subsystem consists of electronic communication equipment for collective (general) use, located in the hardware room or in a telecommunications cabinet, and the transmission medium necessary for connection to the distribution equipment serving the horizontal or backbone subsystems.

Telecommunications cabinets must provide all the necessary conditions (space, power, environmental conditions, etc.) for the passive elements and active equipment installed in them. Each cabinet must have direct access to the main cables.

Telecommunications equipment must be grounded in accordance with local and national regulations.

The equipment includes cross-connect fittings, patch panels and racks, active telecommunications equipment, as well as fixtures and devices for testing. It is also necessary to provide a grounding line based on the connecting conductor to ensure direct connection between the equipment room and telecommunications cabinets. These elements are part of the grounding infrastructure (the system of telecommunications routes and premises in the building structure) and do not depend on the equipment or cabling system. The equipment room should not be used by other building services that could directly or indirectly interfere with the functioning of the telecommunications system.

Subsystem	Signal carrier type	Recommended Use
Horizontal cables		Voice, data
	Optical fiber	If necessary (1)
Trunk cables	Shielded or unshielded twisted pair	Voice and Low Speed ​​Data Media
	Optical fiber	High-speed data transmission medium
Territory backbone cables	Optical fiber	For most applications. The use of optical fiber solves many problems associated with sources of interference.
	Shielded or unshielded twisted pair	If necessary (2)

(1 ) Under certain conditions (safety considerations, environmental conditions, etc.) the use of fiber optics for horizontal cables may be considered

(2 ) UTP or FP can be used in the backbone subsystem of the territory if the distance allows it and at the same time, the wide bandwidth characteristic of optical cables is not required.