Building low voltage network project
Our design organization has developed the design stage of the project for the internal communication networks (low-current networks) building of a multifunctional business complex.
DESIGNING INTEGRATED SECURITY SYSTEM
Description of the design solutions of the CSB.
The internal communication systems of the hotel-office complex with an underground parking lot include:
- Structured Cabling System (SCS);
- Local area network (LAN);
- The telephone system (PTS);
- The system of urban radio broadcasting network (RT);
- Clock System (SCS);
- Cable Television System (CTS).
- Selective Communications System (SCS) with MSH safety zones.
Structured Cabling System
General Information
Structured Cabling System (SCS) is a telecommunication infrastructure of the local area network designed to transfer digital, voice and video information and provide other telecommunication services.
The building features special premises to accommodate the main switching center (MCC) of the complex of information and computer systems as well as special premises to accommodate switching floor centers (SFC) of low-voltage systems.
The architectural and construction solutions of the building envisage vertical cable shafts that make it possible to lay the necessary volume of cables between the floors, taking into account the reserve capacity of the sleeves. Cable shafts are equipped with cable trays, a lockable door, and have restricted access for personnel.
The final number and location of the automated workstations where computers and/or telephones are to be installed will be specified in the course of the detailed design and agreed upon with the Customer. At the stage of the project documentation it is supposed to install the automated workplaces in accordance with the plans for the location of the terminal equipment.
General requirements to the SCS design
Technical means of the SCS subsystem provide:
- information exchange;
- ability to separate and optimize information flows;
- reliability of data and multimedia information transfer.
When designing the SCS complex it is assumed to use "Telegartner" equipment from Germany.
The building SCS is designed taking into account the use of modern network technologies.
SCS design is performed in accordance with the requirements of ISO/IEC 11801 (international) standards, as well as in accordance with the existing requirements of regulatory and expert state bodies and departments of the Russian Federation (see the list of regulatory documents).
When performing SCS design work, the design solutions for cable runs, embedded connections and workplace equipment, as well as design solutions for external information trunks of the building shall be taken into account.
Requirements for the composition and structure of the SCS
The purpose of the work is to build a cable system serving for data transmission and multifunctional information, and including the following subsystems:
- vertical cable subsystem;
- A horizontal cabling subsystem;
- The main communication center of the building (MCC);
- distribution points of the building floors (floor cross sections of weak-current systems (KCs) or communication niches).
Structured Cabling System (hereinafter referred to as SCS) under construction complies with category 6 or higher.
The manufacturer shall have a certified ISO 9001-2001 (ISO 9001:2000) quality management system.
Components of the cabling infrastructure are patch panels and sockets for connecting terminal equipment. Switching panels and active network equipment have a standard 19' mounting size for placement in telecommunication cabinets. CCs are equipped with 19-inch installation double-frame racks of dimensions not less than 600x600 height to 42U.
If necessary, the use of wall-mounted racks is possible. Racks will be equipped with accessories necessary for functioning, such as cable organizers, socket blocks.
Fittings embedded designed to provide cable bending with a radius of at least 25 mm, which meets the requirements of ANSI / TIA / EIA-568-B.2., EN50174 and ISO / IEC 11801.
To reduce the cost of SCS is supposed to use modular sockets and patch panels, ie for these components used the same type of information module RJ-45.
SCS will be equipped with the required number of patch cords of different lengths to perform switching at the distribution points and connect the terminal equipment at the stage of working design.
The SCS envisaged by the project covers the following functional areas of the building:
- Rooms and service/administrative areas of the apartment-type hotel;
- Administrative offices for building management services and security/maintenance services;
- Technical Rooms where communication with public address areas is required;
- Public areas, conference room area, and other areas not intended to be rented out (if available).
- Receptions.
For the areas to be rented out, the SCS is not provided. The main SCS cable system on the floors of the building intended for lease assumes the laying of a single-mode fiber-optic cable to each of the floors for unimpeded ability to provide the tenant's chosen transport service provider with the service delivery environment. For laying in the CC floors it is assumed to use a fiber-optic cable with a capacity of 8 wires.
Requirements for trunk cable subsystem
Vertical SCS cable subsystem ensures connection of Main Computing Centers to the SCS floor switching centers (SCC) by 8 cores single-mode fiber-optic cable.
Vertical SCS cable subsystem is supposed to be laid in special dedicated cable channels (embedded pipes and cable trays).
The vertical cabling subsystem ensures data transmission at the speed of at least 10 Gbit/s.
It is assumed that optical or copper (depending on the type of PBX selected at the detailed design stage) vertical communication lines connecting the GSC premises with the ATC equipment located in it (line crossing), and cross equipment of the floor distribution points will be arranged. For the telephone system of the building is possible to use as a vertical cable communication lines multipair cables of the 5th category.
Requirements for the horizontal cabling subsystem
SCS horizontal cabling subsystem provides the connection of terminal equipment of various infrastructure systems of the Facility to the switching centers (CC) of the floors.
Horizontal cabling subsystem is designed using twisted pair cable of category 6 or higher and provides for transmission of data along any path between equipment and network stations at a speed of at least 100 Mbit/s.
At the workplaces of the personnel equipped with SCS is supposed to install a modular socket containing two RJ-45 ports for the connection of an automated workstation and telephone equipment.
According to the requirements of ISO / IEC 11801 length of horizontal subsystem cables from the server or from the cross cabinet to the workplace should not exceed 90 meters.
Horizontal SCS cable subsystem is installed in the corridors - in trays behind the false ceiling, in the working and living spaces covertly - in plastic PVC pipes.
Horizontal cabling for the leased premises is not provided by this project and shall be performed by tenants after the premises of the complex are put into operation.
Requirements for SCS switching centers
The SC SCS cubicles shall have open double-frame 19" telecommunication racks for the installation of the patch panels, cable management and active equipment of the systems. The requirement for restricting unauthorized access in this case is achieved by means of key locking and provision with elements of access control system of the SCS room itself due to small size of the room.
The active equipment of the local area network (LAN), if necessary, will be located in the cabinets and racks of the SCS and floor SCS.
The installation of standard enclosed telecommunication cabinets of at least 800x800 42U or more in the SCC room is assumed, if the appropriate size of the switch space, providing installation of the required number of active and passive switching equipment does not allow to provide a reserve of at least 25% of the calculated.
Requirements to workplace equipment
At the typical workstations will be installed blocks of sockets. Each block contains two RJ-45 sockets, one of which is designed to connect a personal computer, the second - to connect the phone.
Cable separation schemes are unified and provide a guaranteed connection to the cable system of LAN equipment and telephone equipment (personal computers, network printers, servers, other computer equipment that has standard interfaces for connecting to local computer networks, as well as digital and analog telephones).
The project provides workplaces for the following functional areas:
- Administrative hotel premises: 1 workplace per 6 sq.m;
- Administrative premises of operation service: 1 workplace per 8 sq.m;
- Service rooms of the operation service: 1 workplace in the room: 1 workplace per room;
- Control room, central control room (each workplace);
- Technical premises (where necessary): 1 work place per room;
- Hotel rooms: 2 workstations per room.
These indications are preliminary, the exact number and location of workplaces are made in accordance with the design project of this or that functional area.
Local computer network
The projected complex provides for the organization of a local area network as part of the building's own needs. For the rented premises the LAN may be organized under an additional agreement.
The computer network is meant for processing and transferring information from all departments and services of the complex, organizing the management system and Internet access. Computer equipment, software and network parameters are selected at the stage of detailed design.
For LAN used cable channels and rooms to install equipment described in the section SCS.
The project provides the possibility of organizing wireless access to the local network and the Internet (WI-FI) at the request of the Customer.
Standards for the LAN - Gigabit Ethernet - IEEE 802.3z (1000BaseSX, 1000BaseLX, 1000BaseCX), IEEE 802.3ab (1000BaseT) and IEEE 802.3u (100BaseTX). The topology is star. Active equipment is installed in the crossover rooms if necessary.
The local area network is based on a composite layered network model with the following functional modules:
- Core layer;
- Access layer;
- Server farm;
- Security contour.
Core level, server farm, security loop.
The composition of the equipment will be determined in the course of detailed design as specified by the suppliers of telecommunications services and the Customer's requirements.
Access Layer.
Switches of access level shall be installed in the premises of communication centers (CC). Each switch of access level shall have an optical channel with bandwidth not exceeding 10 Gbps to the core equipment. Each switch must have the required number of copper ports with bandwidth of no more than 100/1000 Mbps with power supply (PoE) for the connection of user equipment and Wi-Fi access points.
Telephone communications system
The telephone communication system (PTS) is performed in the volume of the building's own needs, the PTS for the whole building is performed in full under an additional contract.
The automatic telephone system is based on the digital automatic telephone exchange "Alcatel".
The architecture of the PBX assumes further development and increase in the number of telephone subscribers by installing additional media gateways or additional subscriber boards in the existing media gateways.
In connection with this requirement, the architecture of the processor-gateway interaction over IP is used. The telephony control processor shall be selected during detailed design based on the maximum number of subscribers in the building.
The project provides for the possibility of organizing and using both IP-telephony and analog phones.
Requirements for functional purpose
STS provides:
- interoffice telephone, fax, modem connection with shortened numbering;
- Access to local, long-distance and international lines;
- connection to existing telephone networks (if any);
- recording of telephone conversations;
- direct speakerphone communication "director-secretary".
Requirements to the PBX
The following requirements are made to the PBX:
- PBX should be of modular design and have a distributed architecture;
- PBX should handle the tasks of call holding, call acceptance and processing, forwarding (for busy, unanswered), the possibility of pickup-groups and conference calls (the connection in a conversation more than two subscribers), voice or unified mail, etc;
- PBX should have an integrated system of mini-cellular communication standard DECT with the possibility of further use at the request of the customer;
- PBX should not require forced ventilation and cooling.
- PBX should work with various inter-station signaling systems without changing the configuration and composition of the equipment;
- PBX should provide directory service for storing information about the system subscribers;
- PBX should provide the ability to remotely configure and monitor (using a secure protocol);
- The PBX shall provide voice messaging functions and the possibility of various voice mail systems;
- Tariffing of all telephone conversations;
- Traffic accounting for incoming and outgoing calls;
- PBX shall be provided with warranty and post-warranty maintenance;
- PBX should have minimally required amount of spare parts and accessories,
- ATS should have a certificate of the Ministry of Communications of Russia.
PBX equipment should be installed in the main control room, which meets the requirements for the equipment room specified in the relevant chapters of TIA/EIA-568B standard.
More detailed requirements for the PBX will be defined and agreed upon with the Customer during the detailed design of the system.
The system of urban radio broadcasting network
The multifunctional complex is equipped with means for receiving programs of the city broadcasting network.
The building's radio broadcasting network is designed to receive signals from the Moscow City Radio Broadcasting Network (MGRS) and broadcast 3 program wired radio broadcasts and Civil Defense and Emergency programs in the service rooms and hotel rooms (apartments).
The following equipment shall be used for the site's radio broadcasting network: a TGA-10 subscriber transformer (or several, depending on the number of subscribers), a rack for the lines of the wire broadcasting network, a box (for branching and limiting), a radio socket for the wire broadcasting network, a subscriber loudspeaker.
The type of equipment is selected in accordance with the MGRS specifications.
The internal radio broadcasting network is performed from the subscriber transformer with the installation of limiting boxes in the floor communication cabinets and outlets. Radio broadcasting network outlets shall be installed, in rooms with personnel on duty around the clock:
- in the security services room (CPO SPZ and SB);
- control room of engineering systems.
For the apartments, the number of junction boxes required to connect the MGRS points, based on one radio point in the administration premises, duty personnel, and the apartment. The number of radio points is specified in the working design.
In the rooms of control rooms and security services are provided 3 program loudspeakers, which through radio sockets are connected to the radio distribution network. Power supply of radio receivers is carried out from AC 220V, and, to ensure the possibility of connecting 3 programmable speakers, power outlets 220V installed at a distance of not more than 1.0 m from the radio sockets.
Signals MGRS connected to the equipment warning and evacuation management system (SOUE) to organize the translation of signals MGRS in a fire. Thus, the fire alarm and evacuation control system provides messaging to all the premises of the complex with permanent or temporary stay of people. For the transmission of MES messages about emergencies, the signal from the distribution radio broadcasting network is fed to the input of the fire alarm control system.
For the building, the signal input of the MGRS is carried out according to the technical specifications received by FSUE MGRS (according to the external network project).
The radio system cable shall be laid in low current risers, ducts and PVC pipes.
Clockwork system.
The created clock system is an integral part of the overall facility control system and is designed to synchronize the exact time of the dispatching systems, security systems, local area network using the radio signal from the GPS system.
The clock system consists of:
- single clock microprocessor station;
- radio time correction module by GPS signal with an antenna;
- secondary clock and display (with date and time display);
- distribution network.
Preliminarily, as a secondary clock should be selected devices with a diameter of 40 cm, scoreboard with a height of not less than 100 mm.
It is proposed to install clocks and scoreboards in all elevator lobbies, reception areas, lobbies. The exact places of installation are determined at the working design stage and coordinated with the developers of the design project.
The clock microprocessor station is automatically synchronized with the help of radio corrections device which consists of GPS signal receiver with an external active antenna.
The active antenna is installed in the area of a confident GPS signal reception. The exact location of the antenna is selected during the detailed design phase.
Cables are wired with cables recommended by manufacturers of equipment. Predominantly non-combustible cables with low smoke emission are used.
Cables are laid in the main conduits of the facility on trays and in ducts, as well as in PVC pipes.
Grounding and grounding of electrical consumers shall be performed in accordance with the requirements of Electrical Installation Regulations.
Power supply of the system is carried out according to the 1st category of reliability.
Cable TV system
The cable TV system provides:
- the ability to broadcast over a distribution network complex channels of cable broadcast television;
- reception and broadcasting of satellite broadcast television signals for the hotel.
The number and composition of satellite broadcasting channels shall be determined at the stage of detailed design and agreed with the Customer. The number and composition of cable broadcasting channels shall be determined by the cable TV operator and the Customer.
TV signal distribution
Distribution network is designed to work in the range of 950-2400 MHz (satellite broadcasting in the hotel), 47 - 862 MHz (cable broadcasting). Distribution network equipment includes: amplifiers, switches SAT (multiswitches), dividers, taps.
TV socket is provided in the room of the central control panel for security systems and fire protection systems.
For rented premises installation of outlets is not provided and installation of taps is carried out on the following calculation: