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Introduction

A structured cabling system (SCS) is used to provide communication between terminal information transmission devices (computers, terminals, telephone and fax machines) and active switching equipment (switches, hubs, office automatic telephone exchanges, etc.). A structured cabling system is a hierarchical cabling system of a building or group of buildings divided into structural subsystems. It consists of a set of copper and optical cables, patch panels, patch cords, cable connectors, modular jacks, information outlets and auxiliary equipment. All elements are integrated into single system and operated according to certain rules. Three main principles are laid down in the SCS:

Versatility;

redundancy;

Structured .

The versatility of the cable system is expressed in the fact that it is not built for any specific application, but is created in accordance with the principle of open architecture and based on relevant standards.

Redundancy implies the introduction of additional information outlets into the cable system. The number of information outlets is not determined by current needs, but is determined by the area and topology of the working premises. Thus, the organization of new jobs, adaptation to the specific needs of the customer, occurs quickly and without disrupting the work of the organization.

Structuring consists in dividing the cable system into separate subsystems that perform strictly defined functions.

The purpose of the course project is to gain practical skills in designing a structured cabling system using the example of a 4-story office building.

cable structured subsystem design

1. Description of the design object

1.1 Purpose and goals of creating a structured cabling system

The created system is designed to ensure the functioning automated systems customer, as well as for the implementation of centralized management of the cable industry.

SCS is intended for:

§ Data exchange in the data network;

§ Access to Internet resources;

§ Providing reliable information transmission channels within the data transmission network;

§ Preparation of the basis for the creation of a single information space in the territory;

§ Provision of security systems and other public services on the territory of deployment of the data transmission network;

1.2 Initial data for design

The created SCS should ensure the functioning of automated information systems based on the LAN and the telephone network of the building.

The structured cabling system is installed in a 4-storey office building, separate floors and working rooms on them have an identical layout. The floor height between floors is 3.5 meters, the total thickness of the floors is 50 cm.

In the corridors and in the workrooms, the installation of false ceiling with a free space height of 80 cm. There is enough free space behind the false ceiling to accommodate the trays used for laying cables for various purposes. The walls of the building and internal non-permanent partitions that separate the premises from each other are made of ordinary brick and covered with a layer of plaster, the thickness of which is 1 cm. There are no additional channels in the floor and walls that can be used for laying cables provided.

2. Selection of main technical solutions

2.1 Principles of administration and topology of SCS

The principles of administration or management of the SCS are entirely determined by its structure. A distinction is made between single-point and multi-point administration.

Multipoint administration is understood as the management of SCS, which is built according to the classical architecture of a hierarchical star. The hierarchical star architecture can be used for a group of buildings or for a single building. In the first case, the hierarchical star consists of the central cross of the system, the main crosses of buildings and horizontal storey crosses. The central cross is connected to the main crosses of buildings with the help of external cables. Floor cross-sections are connected to the main cross-section of the building by cables of the vertical shaft. In the second case, the star consists of the main cross-section of the building and horizontal storey cross-sections, interconnected by cables of the vertical shaft. The hierarchical star architecture provides maximum control flexibility and maximum system adaptability to new applications.

The number of distribution nodes is determined by the number of storeys of the building and the length of the floors. Usually, one (floor) distribution node is installed on each floor. (Figure 2.1.1) If the floor is long, several distribution nodes can be created on it, each of which serves the area within the reach of workplaces with a 90-meter cable of the horizontal cable system. Floor distribution nodes are connected by main channels to the main distribution node of the building.

The building cabling system should have no more than two levels of hierarchy. In small buildings with a low concentration of jobs, it is possible to install one distribution unit for the entire building, which is located on the floor where most jobs are concentrated.

A single point administration architecture is used in situations where cabling management is required to be as simple as possible. Its main feature is the direct connection of all information outlets of workplaces with switching equipment in a single technical room. A fundamentally similar architecture can only be used for SCS installed in one building and not having a backbone subsystem. Single point administration provides the easiest circuit management possible by eliminating the need to cross circuit circuits in multiple locations. Single point administration architecture does not apply to a group of buildings.

Figure 2.1.1 Topology of the SCS, where KZ - cross building; KE - cross floor; IR - information socket

2.2 Selecting locations for control rooms and distribution rooms

In the general case, the technical premises that are part of the SCS administrative subsystem are divided into control rooms and cross rooms.

hardware a technical room is called a technical room in which, along with the group switching equipment of the SCS, there is an active network equipment for the collective use of an enterprise scale (UPBX, servers, switches). Control rooms are equipped with fire extinguishing, air conditioning and access control systems.

The cross room is a technical room that houses the switching and network equipment of the SCS.

The control room can be combined with the cross building.

The area of the control room serving the workplaces of the building should be 14 m 2. To place the control room, it seems most appropriate to allocate room 111, since it is located on the ground floor, it is not a checkpoint, it is located approximately in the middle of the floor and does not adjoin the outer walls of the building, it is located not far from the stairs, etc. Room 111 has an area of 20 m 2, which exceeds the recommended area of the control room, obtained on the basis of the specific norm - 0.7% of the working area, so it is advisable to combine it with the cross room on the first floor.

The normative area under the cross room, based on the number of serviced RRs, should be 6.2 m 2, which slightly exceeds the minimum allowable value of 6 m 2. Rooms 111, 211 and 311.411 with an area three times the standard are allocated for cross rooms on different floors. The presence of space reserves allows in the future to place additional network equipment for collective use in these premises. The distance from these technical rooms to the farthest outlet turns out to be approximately 58 m, that is, the diameter of the serviced working area will not exceed 70 m, then a single-level (centralized) CKC structure is implemented on the floors.

On the first floor of the building, there is no separate room for CE, and the switching equipment necessary for servicing the cables of the horizontal CKC subsystem of this floor is mounted in the control room.

UPATS, servers and central LAN equipment will be located in the control room, that is, CKC is built according to a two-level scheme using the principle of multipoint administration.

2.3 Determination of the physical parameters of the SCS and installation requirements

The throughput of communication channels for the vertical subsystem is at least 1 Gbps, for the horizontal subsystem it is recommended at least 100 Mbps. Form factors for laying cable products: pipes are used for a vertical cable system, trays for a horizontal one, for laying in a false ceiling, and cable channels.

Table 2.3.1 shows the results of calculating the number of workplaces for each of the workplaces based on the ratio - at least one workplace for five square meters area of the room.

Table 2.3.1 Number of jobs

Room number, its purpose	Area, m2	Number of workplaces










111 (hardware / cross)


114(do not use)
115(do not use)
Total per floor










211(cross),311.411


214(do not use),314,414
215(do not use),315.415
Total per floor

The total number of jobs in the building is 320.

Each element of the cable system must be marked, that is, have a unique number, which consists of a prefix indicating the element of the cable system; a field that defines the location of the element and letters that identify the system to which this element of the cabling system belongs. AT this project The following SCS elements are marked:

Workplace;

Patch panel port;

Building room.

Each cable has a unique identifier printed on both sides, which contains the following information:

Cable type (G - 4-pair UTP cable; M - Trunk fiber optic cable of vertical wiring);

Room and workplace number on one side;

The port number of the cross-connect and patch panel on the other side.

Each workplace has a unique identifier that contains the following information:

Three-digit number, including the floor number (first digit), two-digit number of the room in which the workplace is located;

Workplace number in room;

Each patch panel port has an ID that contains:

The letters MC (Main Cross-Connect) for the main cross, 1C (Intermediate Cross-connect) for floor intermediate crosses;

Room number where the main switching node is located;

The single digit after the room number is the patch panel number;

The single digit after the dash is the patch panel port number;

Each room has a number that contains:

A single digit is the floor number;

A two-digit number is the number of rooms on the specified floor.

3. Description of the structured cabling system

3.1 Workplace subsystem

The workstation subsystem is used to connect terminal devices (computers, terminals, printers, telephones, etc.) to the local network.

To implement the workplace subsystem, the following types of socket modules were selected: double information sockets of the RJ-45 type of the 5th category (one module is used to connect a workstation, the second is reserved or used to connect additional network equipment), double sockets VEPS - (provide network equipment and other active devices at the user's workplace with guaranteed power supply) are used to connect the workstation set and other devices operating in the local network, household electrical sockets (for connecting office equipment) and RJ-11 single telephone sockets.

Way of fastening of information and power sockets - a cable channel.

For common rooms you need at least 1 workplace per 5 sq. meters of area of the room, equipped with the necessary socket modules for connecting the minimum set of organizational equipment (typical workplace). In addition, one of the workplaces must be equipped with additional socket modules for connecting a set of organizational equipment (reinforced workplace).

A typical working place (Figure 3.1.1) is equipped with:

Two VEPS sockets (one double);

Reinforced workplace - a workplace equipped with additional socket modules for connecting a set of organizational equipment. A view of the reinforced workplace is shown in Figure 3.1.2.

The reinforced workplace is equipped with:

Two information sockets type RJ-45 of the 5th category (one double);

One telephone socket type RJ-11;

Four VEPS sockets (two double);

One household electrical outlet.

Figure 3.1.1 Typical workplace

Figure 3.2.2 Reinforced workplace

Table 3.1.1 provides information on the number of information and power outlets in the premises of the building

room number	Area, m2)	Number of workers Seats (pcs)	Socket modules	Power sockets	Termination cords (pcs)
						2*VEPS (pcs)	Household (pcs)










111 (hardware / cross)


114 (do not use)
115 (do not use)










211(cross)


214 (not used)
215 (do not use)










311(cross)


314 (do not use)
315 (do not use)










411(cross)


414 (do not use)
415 (do not use)

* Taking into account the percentage for development (10%), the number of patch cords will be 352. They are used to connect network equipment information outlets to socket modules.

3.2 Horizontal subsystem

The horizontal subsystem is designed to connect the control subsystem with the workplace and is characterized by a very large number of cable branches. The horizontal SCS subsystem will be built on the basis of unshielded 4-pair category 5e cables, laid two to each socket block.

To calculate the amount of cable required to implement a subsystem, two main methods are used: the summation method and the static method.

The summation method consists in calculating the length of the route of each horizontal cable and then adding the values found in this way.

The amount of cable required is calculated using a statistical method. This method was chosen based on the fact that there are more than 12 information outlets on each floor and workplaces are evenly distributed over the serviced area.

The statistical method assumes:

1. Calculation of the average length (Lcp) of cable routes according to the formula:

Lcp=(Lmax+Lmin)/2,

where L min and L max are the lengths of the cable route from the location of the cross equipment to the information connector of the nearest and farthest workplace, calculated taking into account the cable laying technology, all descents, ascents, turns and building features.

2. When determining the length of the routes, it is necessary to add a technological margin of 10% of Lcp and a margin X for cable routing procedures in the distribution node and the information connector; so the length of the traces L will be:

L= (1.1Lcp+X)*N ,

where N is the number of sockets on the floor.

We will calculate the amount of cable required for each floor and the building as a whole.

For each floor:

Lmin = 10 m; Lmax = 58 m; N=80, k=10%.

Average length (L cp) of cable runs:

L cp \u003d (L max + L min) / 2 \u003d (58 + 10) / 2 \u003d 34 m.

The length of the tracks L will be:

L= (k*L cp+X)*N=(1.1*34+2)*

In total, for the horizontal subsystem it is necessary:

L total \u003d L * 4 \u003d 12608 meters of cable.

There are 305 meters of cable in the bay. Then, to create a horizontal subsystem, 42 (12608/305=41.338) bays, or 12810 meters of cable (42*305=12810) are required.

The laying of cables of the horizontal subsystem on the floors is carried out in a cable channel, which is mounted on the wall.

The specification for cable products for organizing a horizontal system is in the table in the appendix. Schemes of the horizontal subsystem of SCS 1-4 floors are shown on graphic sheet 2.

· Cable channel, 35x80 mm - for laying to the workplace;

· Tray 100x50 mm - for laying the track to the audience;

· Tray 100x80 mm - for laying the route along the corridor from the cross.

3.3 Vertical subsystem

The main (vertical) system of the building provides a connection between the cross-country of each of the floors of the building with the building's control room.

Depending on the degree (high, medium or low) of integration in the building, the length of the backbone subsystem path and the required data transfer rate, fiber optic cable, unshielded or shielded twisted pair can be used to install the vertical SCS subsystem.

Given the initial assessment of the capacity of trunk cables, we choose a high degree of integration. This configuration includes two or more outlet modules per data outlet with the appropriate number of horizontal cables per workstation. A characteristic feature of this configuration is the use of a fiber optic cable for organizing an internal backbone.

The number of optical cores of the backbone cable system is determined taking into account 100% redundancy, therefore, when laying the backbone cable network, the project provides for two different routes (main and backup), going from the central control room, where the switching equipment is installed, to floor cabinets (column sheet 3). Reservation will be made using a twisted pair cable of category 5e.

The total height of the building is 12 meters. Riser channels pass through the technical rooms, that is, the maximum length of the main cable will be approximately 25 m

We will calculate the cables according to the principle of high integration. We accept that for each workplace in the internal backbone of the building, 0.2 fibers should be provided and, accordingly, for each floor: 16 (80 * 0.2 = 16) for the main route and 16 (80 * 0.2 = 16) for the backup route optical fibers. In general, the building needs 64 optical fibers for the main route and 64 for 100% redundancy.

The backbone of the LAN signal transmission trunk should be a multi-mode indoor fiber optic cable with traditional 62.5/125 type fibers.

Table 3.3.1 Internal Trunk Subsystem Cables

cable type	Number of pairs/fibers	Number of cables	cable length m	Purpose

Summing up the obtained values, we obtain the required amount of cable for the implementation of the internal trunk subsystem of the designed cabling:

· 52m of 16-fiber optical cable for the main route and 52m of 16-fiber optical cable for the backup route.

For the passage of vertical sections, risers or shafts allocated for this are usually used. various kinds. These passages are in practice implemented in the form of slots, sleeves and embedded pipes. .

For laying cables of the subsystem of internal highways of the designed CKC, we will use vertical tubular elements such as sleeves with a diameter of 100 mm, located along the wall of the technical room and performing the functions of riser channels.

3.4 Control subsystem

In the premises of the control subsystem, active and passive equipment of computer, telephone, signal and other types of networks are placed in order to organize access to external information networks.

In general, the technical premises of the control subsystem are divided into:

hardware;

Cross shoes

In the system being designed, taking into account the total number of serviced jobs, we will accept the following equipment layout:

Mounting structures such as cabinets are installed in the cross rooms;

In the control room, a mixed installation option is used.

Patch panels for various purposes, mounted in each cross floor, support the functioning of active network equipment connected to 80 workstations. In the rooms of the control room and cross floors, the central placement of the cabinet with a circular approach to it is used.

Switching of workplaces is carried out with the help of special cross-cables between the panels on the main cross. The use of such a scheme provides a safe method of switching active equipment.

In the hardware room (No. 111) the following is installed:

- No. 1 - 19” cabinet for 28 units (28U), which fits:

· 4 fiber optic switches Shanghai BDCOM L2 S2228F for 24 ports; (5U)

· 4 fiber optic patch panels, 19"", with 24 duplex adapters; (6U)

4 horizontal cable organizers;(6U)

server equipment (6U);

- No. 2 - 19” cabinet for 32 units (32U), which fits:

· Uninterruptible power supply GE M 2200 19"" with power - 2.2 kW, voltage - 140 V. ~ 305 V., number of output sockets (IEC 320) - 9; (3U).

In the room of the cross rooms (No. 211,311 and 411) a 19” cabinet for 32 units is installed:

5 D-Link DES-3200-28 switches for 24 RJ-45 ports and 4 1000Base-T/SFP combo ports

5 patch panels, 19"", with 24 duplex adapters; (7U)

8 horizontal cable organizers;(10U)

· Uninterruptible power supply GE M 2200 19"" with power - 2.2 kW, voltage - 140 V. ~ 305 V., number of output sockets (IEC 320) - 9; (3U).

The equipment cabinet of the 1st floor is assembled and installed in the following sequence (for a 28U cabinet, from top to bottom):

· 1 U - optical switch Shanghai BDCOM L2 S2228F for 24 ports;

· 1 U - 24 ports;

· 1 U - cable organizer;

· 1 U - optical switch Shanghai BDCOM L2 S2228F for 24 ports;

· 1 U - Optical panel Zet ODF 1U 24 SC/FC/Duplex LC 24 ports;

· 1 U - cable organizer;

· 1 U - optical switch Shanghai BDCOM L2 S2228F for 24 ports;

· 1 U - Optical panel Zet ODF 1U 24 SC/FC/Duplex LC 24 ports;

· 1 U - cable organizer;

· 6 U - server hardware;

1 U - plug, (reserve place);

Completion and installation of the 1st, 2nd, 3rd and 4th floor cross-country cabinet is carried out in the following sequence (for a 32U cabinet, from top to bottom):

· 1 U - switching equipment D-Link DES-3200-28 for 24 ports;

1 U - Krone/110 (dual) IDC Patch panel 24 RJ45 ports, category 5e

· 3 U - cable organizer;

· 1 U - switching equipment D-Link DES-3200-28 for 24 ports;

1 U - Krone/110 (dual) IDC Patch panel 24 RJ45 ports, category 5e

· 3 U - cable organizer;

· 1 U - switching equipment D-Link DES-3200-28 for 24 ports;

1 U - Krone/110 (dual) IDC Patch panel 24 RJ45 ports, category 5e

3U - cable organizer;

· 1 U - switching equipment D-Link DES-3200-28 for 24 ports;

1 U - Krone/110 (dual) IDC Patch panel 24 RJ45 ports, category 5e

· 3 U - cable organizer;

1 U - plug, (reserve place);

· 3 U - uninterruptible power supply GE M 2200 19"" (2.2kV).

The specification of equipment and cabinets located in technical rooms is given in the appendix.

Conclusion

As a result of the completed course project, a structured cabling system of a four-story building was designed.

In this course project, all stages of designing a structured cabling system of an enterprise were considered: designing a workplace subsystem, designing a horizontal subsystem, designing a vertical subsystem, designing a control subsystem.

In the course of the project, useful skills were obtained in all the considered sections of the field of network technologies.

The designed network is easy to configure, install and operate. The equipment used in building the network is reliable and easy to use, easily replaceable and affordable.

List of used literature

1. A. B. Semenov, Design and calculation of structured cable systems and their components. - M.: DMK Press, 2003. - 416 p.

2. N.A. Olifer, V.G. Olifer, Transport subsystem of heterogeneous networks, 1997

3. Computer networks. Principles, technologies, protocols: A textbook for universities. 2nd ed. / N.A. Olifer, V.G. Olifer. - St. Petersburg: Peter, 2004. - 864 p.: ill.

4. Fundamentals of Cisco networking, volume 1.: Per. from English. -M.: Publishing house "Williams", 2002. - 512p.: ill.

5. Fundamentals of Cisco networking, volume 2.: Per. from English. -M.: Publishing House "Williams", 2002. - 464p.: ill.

6. Yu.V. Novikov. Equipment of local networks. Functions, selection, development. M., Publishing house "Ekom", 1998, 288s.

7. T.I. Radko. Designing a structured cabling system. Electronic textbook for students of the specialty 050704 "VTIPO". KSTU, CETO, 2009

8. Radko T.I., M.Kh. Zakirov. structured cabling system. Textbook, Publishing House of KSTU, 2009, 80s

Application

Specification for equipment used in SCS

Table A.1 Specification for equipment used in SCS

Specifications for socket modules and termination cords
Name	Quantity		Amount (tg)

Double RJ-45 socket, VALENA series, LE-774444, Legrand
Telephone socket Valena RJ11 4 contacts 1 connector (aluminum), 7701 38, Legrand
Socket 220V, household 16A, VALENA series, LE-774416, Legrand
Double socket (monoblock) Valena with grounding from the curtain (aluminum), 7701 27, Legrand
Fiber optic socket Legrand Mosaic SC socket, 2M, duplex 74229



Specification for cable products, form factors, telecommunications equipment

Telephone cable Solid-Cross RJ-11 (500m)

Tray DKC 100x50 L 3000, 35022, Depth: 50 mm Length: 3m Width: 100mm
Tray DKC 100x80 L 3000, 35062 Depth: 80mm Length: 3m Width: 100mm
Specification for cable products, switching equipment, form factors


Shanghai BDCOM L2 S2228F Layer 2 (L2) Managed Switch, 24 ports 1000M SFP + 2 ports 10/100/1000M TX + 2 ports 10/100/1000M TX/Gigabit SFP combo
Rigid self-extinguishing PVC pipe 63 mm diameter (3m length of 1 pipe)		1005 (price 1m - 335)
Equipment specification for the control subsystem


Optical panel Zet ODF 1U 24 SC/FC/Duplex LC
Cable organizer with metal rings


Blank 1U

Table A.2 Characteristics of equipment used in SCS

Hyperline HF1DJ19B5 (FO-D-IN/OUT-50-24-HFFR) Multimode fiber optic cable 50/125 (multimode), 24 cores

Conforms to standards	EIA-TIA 455 and IEC-60332, 60754, 60794.
Optical performance meets the standard
Complies with fire safety standard
Conductive material: optical fiber	9/125, 50/125, 62.5/125
Fiber isolation:	dense buffer coating
Reinforcement and waterproofing:	waterproofing reinforcing aramid threads
Outer shell:	halogen-free flame retardant compound (HFFR)
Central strength element:	dielectric rod
Bending resistance	no data 300 cycles
Fiber diameter
Protective coating diameter
Operating temperature
D-Link DES-3200-28 Managed stackable switch 4 SFP ports, 24 RJ-45+ ports 4 10/100/1000Base-T/SFP combo ports
Manufacturer

Type of equipment	Switch
Indicators	Power, Console; for 10/100/1000 Mbps ports: Link, Activity, Speed; for SFP ports: Link, Activity, Speed
Gigabit ports	24 10/100/1000 Mbps ports, 4 of which are shared with SFP ports
	4 gigabit ports shared with SFP ports
Control	Web Interface, Telnet, GUI (Graphical User Interface), Command Line Interface (CLI), SNMP (Simple Network Management Protocol), RMON (Remote Network Monitoring)
WAC (Web Access Control)	Supported
Port Based Network Access Control	Supported, IEEE 802.1x
Access Control List	Supported
Power Supply	built-in
Port Mirroring	Supported; one-to-one, many-to-one, stream mirroring
Compliance	802.1d (Spanning Tree Protocol), 802.1Q (VLAN), 802.1s (MSTP), 802.1w (RSTP), 802.1x (User Authentication)

IGMP support (multicast)
Port Rate Limiting	Supported; with a step of 512 Kbps
MAC Address Table	8000 addresses
	Supported (virtual stacking via software; D-Link Single IP Management support; virtual stacking up to 32 devices possible)
	Supported, IEEE 802.1Q. Up to 4K static groups; up to 255 dynamic groups.

Cooling	1 fan; automatically turns on at temperatures above 35°C and turns off at temperatures below 30°C
19" rack mount	Possible, mounting hardware included
Dimensions (width x height x depth)	280 x 43 x 180 mm
Shanghai BDCOM L2 S2228F 24 Port 1000M SFP + 2 Port 10/100/1000M TX + 2 Port 10/100/1000M Managed Layer 2 (L2) Switch
The switch supports various functions for handling multicast traffic.	IGMP snooping, MVR.
	24x1000 Mbps SFP port 2x10/100/1000 Mbps SFP-Combo ports 1 console port
Switching matrix speed
Switching type	Store-and-forward switching
MAC address table capacity

Dimensions (LxWxH)
Power consumption	28W (Max)
LED indicators	Power, link activity
Temperature	Operating temperature: 0 ... 50°C, storage temperature: -40 ... 70°C
	Port-based VLAN, 802.1Q tag VLAN, VLAN Stacking (selective QinQ), GVRP dynamic VLAN configuration, VLAN port isolation
Clustering	Up to 32 devices controlled from one IP address
Optical panel Zet ODF 1U 24 SC/FC/Duplex LC
Dimensions (without mounting brackets):	430x220x44 mm.
	light gray (RAL7035)
Panel Features:	retractable design; front panels are included in the price; several options for fixing the cable; the ability to run cables from the side and back; installation of cable organizers in any convenient place; a new way of rigid cable fixation - metal (2mm) brackets.
Equipment:	organizers - 6 pcs. splice cassette - 1 pc. cable clamps - 12 pcs. front panels SC (FC, SC duplex, plugs) - 3 pcs. clips for clamping the cable at the input - 2 pcs. double clamps for clamping the cable at the input - 2 pcs. power element clamp - 2 pcs.
Floor cabinet 19" 28U ZPAS WZ-SZBD-081-ZCAA-11-0000-011
	1341x600x800mm

Floor cabinet 19" 32U ZPAS WZ-SZBD-062-ZCAA-11-0000-011
	1519x600x1000mm
	glass door with metal inserts, handle with 3-point lock
Uninterruptible power supply GE M GE M 2200 19 (2.2 kV)
Application area:	Servers and switches; PC and workstations; Cash registers, facsimile equipment, modems and ISDN adapters; Internet servers; Network hardware; Equipment for control systems and telecommunications.
cable organizer
	Access for changing batteries from the front; Easy connection of additional battery packs for extended runtime


	Horizontal cable manager 19"
Maximum number of cables to be laid	25 patch cords 4 pairs UTP 5E
Coating	Powder coated RAL9005
Material
Storage conditions	-40 to +70
Operating conditions	-0 to +70

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sks design example part 2

9.3.6. Selecting the type and calculating the number of organizers

The following types of organizers are used in the designed cable system:

Horizontal organizers installed in mounting structures;

Vertical organizers installed in cabinets;

Vertical organizers installed next to the cross towers in the control room.

According to the diagram in Fig. 9.6 9 horizontal organizers are required in each of the CEs. The SCS switching equipment and LAN network devices in this case are placed in one mounting cabinet. Therefore, we choose the height of the organizer 1 U. In the control room, in that part of the switching field that performs the functions of the PQ equipment, the required number of organizers coincides with the same PQ parameter (that is, 9 pieces). Type-setting panels of the reserve line of category 5e in the amount of 2 pieces require one organizer, 3 optical shelves - three. Additionally, 2 organizers are provided, mounted above and below the central switch. Thus, in total, 15 organizers will be required in the control room. Summing up the indicated values, we obtain the number of products of this variety included in the specification: 9 x 3 + 15 = 42.

Vertical cable organizers (holders) for cables of cords for various purposes in cabinets are installed on mounting rails next to the panels and equipment of individual functional sections of the switching field on both sides of each functionally completed block, that is, a pair for each horizontal organizer and a pair for each 200 - pair panel type 110. Thus, in each cross panel, 22 holders of this type are required. In the control room, the functional section of the horizontal subsystem and network equipment of the LAN workgroup level is serviced by 16 holders, the PBX port display panel by two, optical shelves by six, and category 5e redundant trunk panels by two. Next to the central switch, due to its high height, we install two holders on each side. Thus, a total of 30 holders will be required in the control room.

Summing up the indicated values, we obtain the number of holders entered into the specification: 22 x 3 + 30 = 96. The dimensions of the holder are chosen equal to 93x80 mm.

Vertical organizers for cross towers in connection with the customer's requirement to use patch cords in this part of the administrative subsystem are installed:

On both sides of the crossing towers;

In accordance with the rules - between the second and third cross towers.

Thus, the total number of vertical organizers is three. The mounting height of the bases of the cross towers is chosen equal to the height of the organizers.

9.3.7. Quantity calculation and length determination

terminal, crossover and patch cords in technical rooms

9.3.7.1. Cross shoes

The following types of cord products are provided in cross-country shoes:

Single-pair combined cords with modular plugs and 110-type plugs at different ends, designed to connect panels of a horizontal subsystem and category 3 trunk;

Optical cords - for connecting optical up-link ports of floor switches of working groups to fiber-optic lines of the internal trunk subsystem;

Redundant 4-pair cords with modular plugs - for connecting the electrical ports of the floor hubs to the trunk cable of category 5e.

To calculate the total number of cords of a certain variety, we use a statistical approach. We accept that the supplied cords provide service for 70% of workplaces, and we provide 10% of this amount as part of spare parts and accessories. This means that the specification of the supplied equipment includes a total of 77 cords of the first two types and 8 cords for connecting to uplink ports of floor switches.

In accordance with the initial data, single-pair combined cords will be used for connection to the category 3 trunk.

With the placement of LAN and SCS equipment adopted in the project, shown in Fig. 9.6, the maximum distance between the switches and the category 5e redundant trunk panel will not exceed 65 cm. Taking into account the fact that the redundant trunk dial-up panel sockets are located under the sockets of the up-link ports of the floor switches, this allows the use of cords 1 m long.

To connect the optical modules of the up-link ports of floor switches, we use cords of a standard length of 3 m.

9.3.7.2. Hardware

The following types of cord products are provided in the equipment room:

Single-pair combined cords with modular plugs and 110-type plugs at different ends, designed to connect the female parts of the connectors of the horizontal subsystem panels and the "degenerate" category 3 trunk connecting the mounting structure and wall-mounted cross towers;

4-pair cords with plugs of modular connectors - for connecting horizontal lines to the ports of floor switches of LAN working groups;

Optical cords - for connecting the optical ports of the central switch of the network to the fiber-optic lines of the internal backbone subsystem;

Optical cords - for connecting the optical ports of the central switch of the network to the fiber-optic lines of the external trunk subsystem;

4-pair cords with plugs of modular connectors - for connecting up-link ports of floor switches of working groups to ports of the central LAN switch;

Reserve 4-pair cords with plugs of modular connectors - for connecting the electrical ports of floor concentrators to the trunk cable of category 5e;

Single-pair cords type 110 - for switching female parts of connectors of cross towers;

25-pair Telco pigtails at one end - for connecting a PBX to its dedicated 100-pair cross tower panel.

To improve the technical and economic indicators of the designed system, the control room additionally performs the functions of the first floor CE. Therefore, the number and distribution by length of the cords of the first two varieties in the control room coincide with similar parameters in any storey cross-country.

The central LAN switch is connected to the up-link ports of the workgroup switches as follows:

Multimode optical cords with SC plugs through optical cables of the internal backbone subsystem - to switches in other cross-connects;

Single-mode optical cords through optical cables of the external trunk subsystem - to a previously built network in another building.

Let us estimate the length of twisted-pair cords of the last variety. From fig. 9.6 it follows that the central switch and switches of the LAN working group level of the information and computing system should be placed in different mounting structures. If they are mounted at the same height to simplify maintenance, the distance between the communication ports of these devices can only reach 1.5 m horizontally. Therefore, it is advisable to use 2 m cords. The total number of these cords can be found based on the expected number of switches working groups in the control room and taking into account a 10% reserve will be 8 pieces.

A total of 3 x 8 = 24 multi-mode optical cords, 2+1 = 3 single-mode optical cords will be required to complete the fiber optic connection of the central switch.

To connect the UPATS, mounting cords are used in the form of 25-pair cables with Telco connectors installed at one end. Cords up to 30 m long can be ordered. The distance between the cross towers and the UPATS system unit on the wall of the room is approximately 1 m. In this case, taking into account rises and turns, as well as reserves for laying and cutting, we will take the average length of the mounting cord equal to 5 m In the process of designing the administrative subsystem, seven 100-pair blocks were allocated for the cross-unit UPATS, which will make it possible in the future to switch to connecting 2-pair telephones without any problems. Therefore, the total number of installation cords of the specified type will be: 700 / 25 = 28.

A total of 77 x 4 = 308 single-pair cords with NO connectors will be required to perform switching on the cross towers. We use standard cords 1 m long to perform this operation.

The calculation results are summarized in Table. 9.10.

The smooth operation of the entire future network infrastructure of the enterprise and its service life depend on the competent design of SCS. When designing SCS, all possibilities for expanding the customer's company, changing its structure, number of personnel, increasing the number, purpose and intensity of the use of jobs are taken into account.

"IC TELECOM-SERVICE" offers its customers the following services:

A full range of works on the design of structured cabling systems, installation and maintenance of cable systems

Selection of the optimal solution.

Modernization of the existing network infrastructure.

Designing SCS of any topology, taking into account the requirements of the enterprise.

Approximate estimate of the cost and functionality of the future structured cabling system.

Installation and commissioning.

Testing and marking.

Diagnostics and preventive maintenance of networks.

Technical support and service maintenance SCS.

IC "TELECOM-SERVICE" is an experienced network integrator, which employs competent designers who develop optimal solutions for building structured cabling systems.

Solution Implementation Efficiency

When the Customer contacts our company and until the conclusion of the contract for the design of the SCS, the project manager conducts a survey and analysis of all the technical means available to the customer, determines the architecture of the SCS being developed and provides the Customer with a technical and commercial proposal (TCP) with a detailed description of all types of work that will be performed by the specialists of our company and the capabilities of the Customer.

We offer the Customer a rough estimate of the cost and functionality of the future structured cabling system.

The specialists of our company, in a timely manner and strictly observing the terms of the contract, perform the whole range of pre-project work and activities related to the design of structured cabling systems and networks.

EC "TELECOM-SERVICE" develops network infrastructure projects taking into account the individual needs of the customer, using in the process of creating an SCS project a systematic study of the entire range of problems related to the design of facilities, the implementation and operation of the infrastructure being created.

Our specialists plan the network infrastructure for the possibility of its further development, i.e., ensure further scaling of the system. The possibility of increasing the capacity of the system allows our customers to save money and technical resources when creating new jobs and moving from floor to floor.

After the completion of the project, we are ready to take your system for technical support and service.

Object design. Project documentation

Technical project SCS consists of a standard technical and commercial proposal, including a specification and brief explanations, as well as working documentation made in accordance with GOST standards for SCS. At the stage of creating and discussing the document, before the stage of designing structured cabling systems, the compliance of the developed solution with the requirements of the Customer is established.

The cycle of the technical project includes the design of the SCS itself, installation and commissioning, subsequent Maintenance object.

Technical and commercial proposal for the design of SCS facilities

When the Customer contacts our company and until the conclusion of the contract, the project manager conducts an examination and analysis of all the technical means available to the customer, determines the architecture of the system being designed and provides the Customer with a Technical and Commercial Proposal (TCP).

As part of the technical and commercial proposal, the following documents are developed:

Explanatory note
Contains General characteristics, description of SCS and components, their operational parameters. The note may provide examples of fulfilling the requirements of the Customer
Block diagram of the SCS project
Graphic document that shows the location and relationship of the components of the SCS.
Floor plans
Visually demonstrate the placement of equipment and the location of jobs

Equipment specification
A document describing the quantity and cost of equipment for the implementation of the system, as well as the scope and cost of the work to be done
Technical project
The technical design of the SCS is drawn up at the request of the Customer and is provided after the conclusion of the contract for the design of SCS facilities and before the conclusion of the contract for the installation of the SCS.

Engineering design (SCS)

The technical project is drawn up at the request of the Customer and is provided after the conclusion of the contract for the design of facilities and systems and before the conclusion of the contract for the installation of SCS.

The project is a detailed document describing all aspects of the SCS implementation. Based on the information provided in the technical design, construction and installation work is carried out. A technical project drawn up professionally and with high quality allows installation of SCS even by independent third-party contractors.

As part of the technical project, the following documents are being developed:

Explanatory note
The explanatory note contains a detailed description of the SCS, the composition and purpose of the subsystems, the scheme of their interaction, the methods of organizing cable routes, the marking scheme for the SCS components, the method for protecting system components from external influences and access, and the requirements for personnel installing and operating the system.
Hardware Specifications
List of structural elements, cabinets, cable channels and accessories.
Structural diagram of SCS
A graphic document showing the location and interconnection of the SCS components. It outlines the plan of rooms with switching equipment, the spatial zones served by each switching room, the trunk connections connecting these rooms with each other and the outside world. The SCS scheme contains a description of the qualitative and quantitative parameters of all subsystems, for example, the type and number of cables in the trunk, the number and type of cabinets in the cross rooms, the cross equipment in each cabinet.
Connection and connection tables
A list of all elements of the system, their purpose and binding to premises, ports, cable routes, as well as their method of protection and laying.
Layout plans for equipment in technical rooms and equipment in installation cabinets show the binding of the location of the relevant elements (cabinets - to rooms, cross panels - to cabinets, cables - to cross panels and / or sockets)
floor plans premises
Schemes of the exact spatial arrangement of workplaces, equipment and each element of the system on the architectural drawings of the building.
Programs and methods for testing structured cabling systems contain a list of activities that will be carried out during the implementation of the project.

Working documentation for the SCS project

Working documentation for the project is provided upon completion of all work on the structured cabling project. This documentation exactly corresponds to the installed cable network and contains the parameters of all existing communication channels, the location and labeling of all elements of the created infrastructure, and the rules for operating the system.
The working documentation supplements and refines the technical project documentation. For simple systems, working documentation may not be developed.

In the working documentation for the design of SCS, the following are specified:

cable routing schemes
equipment placement schemes in switching rooms
cable connection diagrams on panels and cross-connects
job organization schemes
connection tables.

Additionally, for the SCS construction project, the following are being developed:

Negotiation protocols - showing changes in cabling and equipment layouts
Testing protocols for certification. The protocol is made in the form of a table of measurements of the functional parameters of lines and channels.
User manual. Contains recommendations for maintaining the working condition of the SCS, a list and terms of warranty and service maintenance.

Technical working project of SCS

It is developed in parallel with the implementation of work on the implementation (after the conclusion of a contract for the design and execution of installation work with the Customer) and is provided to the Customer upon completion of work on the implementation of the SCS project. It is a document that fully describes the designed and installed cable network.
It is allowed to combine "Technical design" and " working documentation”into one document “Technological project”.