OBJECTIVES - DMC Cisco Networking Academyacademy.delmar.edu/Courses/ITNW2313/ChGuides/DCIG_Ch-07.pdfOBJECTIVES 1. Describe various ANSI/TIA/EIA standards for commercial buildings and

OBJECTIVESOBJECTIVES1. Describe various ANSI/TIA/EIA standards for commercial buildings

and residential settings.2. Discuss the specific Technical Systems Bulletins that can affect

telecommunications installations.3. Recognize and use standard grounding and bonding requirements for

telecommunications equipment.4. Describe documentation methods that are used for cabling in a

commercial building.

The entrance facility—providing the point where outside cabling interfaces with the intrabuilding backbone cabling—the physical requirements of the network interface being defined in the ANSI/TIA/EIA 569 standard.

The six major components of a structured wiring system are:

The main/intermediate crossconnect—located in the equipment room and serving as the interfacing between the entrance facility and the backbone distribution system.

The backbone distribution system—provides the interconnection between the telecommunication closets, equipment rooms, and entrance facility, and consists of the backbone cables, intermediate and main crossconnects, mechanical terminations, and the patch cords or jumpers used for backbone-to-backbone crossconnections.

The six major components of a structured wiring system are: (continued)

The horizontal crossconnect—provides the interconnection between the work areas and the telecommunications closets, typically on one floor of a building.

The horizontal distribution system—extends from the work area telecommunications outlet to the telecommunications closet, and consists of the horizontal cabling, telecommunications outlet, cable terminations, and all relatedcrossconnections.

The six major components of a structured wiring system are: (continued)

The work area(s)—components that extend from the telecommunications outlet to the station equipment, using wiring that is simple to interconnect, move, and change.

The ANSI/TIA/EIA 569 standard addresses the following elements of building pathways and spaces:

Backbone Pathways—consist of intrabuilding(within a building) and interbuilding (between buildings) pathways, and may be either vertically or horizontally oriented.

Intrabuilding Pathways—provide the means for placing backbone cables from the entrance facilities or space, to telecommunications closets, and from equipment rooms, to either the entrance facilities or space, or telecommunications closets. They consist of conduit, sleeves or slots, and trays.

Interbuilding Pathways—interconnect separate buildings, such as those in campus environments, consisting of underground, buried, aerial, or tunnel pathways.

The ANSI/TIA/EIA 569 standard addresses the following elements of building pathways and spaces: (continued)

Entrance Facility—consists of the telecom-munications service entrance to the building, including the entrance point through the wall, and continuing to the entrance room or space, and may contain the backbone pathways that link to other buildings in campus environments. Separation of telecommunication circuits from power circuits and other electro-magnetic energy sources is currently being studied by the standards committees of the ANSI/TIA/EIA.


Equipment Room—centralized space for telecom-munications equipment, which should house only equipment directly related to the telecommunications system and its environmental support systems.

Sizing—must meet the known requirements of specific equipment. If equipment requirements are unknown, plan for 0.75 square feet(0.07 square meters) of equipment room space for every 100 square feet (10 square meters) of workstation space. Regardless of equipment used, there must be a minimum of 150 square feet (14 square meters).

Special-use building sizing—must base ER size on the number of workstations.


Horizontal Pathways—should provide the facilities for the installation of telecom-munications cable from the telecommunications closet, to the work area telecommunications outlet. Design guidelines and procedures are specified for underfloor, access-floor, conduit, tray and wireway, ceiling, and perimeter facilities.


Telecommunications Closet—must be dedicated to telecommunications functions and support facilities only, with a minimum of one closet per floor. Additional closets should be provided for each area up to 10,000 square feet (1,000 square meters) when either the floor area served exceeds 10,000 square feet (1,000 square meters), or the horizontal distance exceeds 300 feet (90 meters).


Workstation—primarily concerned with the telecommunications outlets, because they are the usual connection point between the horizontal cable and the connecting devices in the work area. The reference is made to the overall box or face plate as opposed to individual outlets/connectors, with a minimum of one outlet face plate per workstation required. The typical workstation space allocation is one every 100 square feet (10 square meters).

ANSI/TIA/EIA 569 provides recommendations for the physical spaces and pathways used by modern telecommunications cabling systems and equipment, with recommendations made in the following areas:

Telecommunications spaces, including work areas, telecommunications closets, equipment rooms, and entrance facilities. Specifications provided include:

The sizing of telecommunications spaces

Floor loading requirements—dynamic and static

Environmental considerations—floor coverings, lighting requirements, and so on

ANSI/TIA/EIA 569 provides recommendations for the physical spaces and pathways used by modern telecommunications cabling systems and equipment, with recommendations made in the following areas: (continued)

Telecommunications pathways, including horizontal and backbone cable distribution systems—conduits, sleeves, trays, and so on, and grounding pathways. Specifications provided include:

The number of cable pathways to install

Acceptable types of pathways

Installation procedures

Assign a unique identifier to each element of the cabling system.

The ANSI/TIA/EIA 606 standard recommends documenting the cabling system in the following way:

Create a document for each of the identified elements.

Link related records to each other.

A ground reference for telecommunications systems within the telecommunications entrance facility, the telecommunications closet, and equipment room.

ANSI/TIA/EIA 607 specifies the requirements for:

Bonding and connecting pathways, cable shields, conductors, and hardware at telecommunications closets, equipment rooms, and entrance facilities.

Interconnectivity to other building grounding systems.

Color-coding pair 1 as Red/Green, and pair 2 as Orange/Black

Specifications for STP-A telecommunications cable include:

Shielded, 150-ohm, 2-pair cable using 22 AWG (0.63 mm) solid conductors Should be marked as “150 ohm STP-A”, in addition to any markings required by local or national safety codes

Same mechanical and transmission requirements to be applied to backbone and horizontal cables, with additional requirements provided for outdoor runs

Standard outlet interface and pair assignments are similar to the ISO 8802-5 Token-Ring connector (IEC 807-8), except that performance requirements are more severe.

Specifications for STP-A connectors include:

Marked as “STP-A”, with other markings required by local or national safety codes

Stranded conductors at 26 AWG (0.4 mm)

Specifications for STP-A patch cables include:

Allows for an overall shield, rather than individually shielded pairs

Less severe attenuation and NEXT loss requirements than horizontal cable

Shields should be grounded at the telecommunication grounding busbar.

Specifications for STP-A installation practices include:

Shield voltage to ground should not exceed 1 Vrms at the work area.

Shield resistance to ground should not exceed 3.5 ohms at the work area.

Fiber is recommended for runs between buildings at different ground potentials.

Table 7-1: TIA/EIA and ISO/IEC Standards Specifications

Table 7-1: TIA/EIA and ISO/IEC Standards Specifications (continued)

Figure 7-1: Reconfigurable Panel

Figure 7-2: Using a MUTOA

Figure 7-3: Using a MUTOA to Reconfigure a Work Area

Figure 7-4: Using a CP

Consolidation points shall not be located in any obstructed area.

Some important requirements of CPs are:

Consolidation points shall be located in fully accessible, permanent locations such as building columns and permanent walls.

Consolidation points shall not be installed in furniture unless that unit of furniture is permanently secured to the building structure.

Consolidation-point accessibility and marking should follow the ANSI/TIA/EIA T568A recommendation that a consolidation point should be readily accessible and its location visibly marked, for ease of routine maintenance and reconfiguration.

Some important requirements of CPs are: (continued)

Figure 7-5: Using a CP to Reconfigure a Work Area

Utility columns attached to furniture panels

Consider the following as legitimate open office locations for a CP or a MUTOA:

Overhead storage cabinets

Enclosures at floor level

Freestanding utility columns

Telephone

The National Electric Code (NEC) Article 800, called Communications Circuits, covers the installation of the following communications equipment and circuits:

Telegraph (except radio telegraph)

Outside wiring for fire alarms, burglar alarms, and similar central station systems

Telephone systems not connected to a central station system, but using similar types of equipment

Table 7-2: NEC Substitution Chart

Table 7-3: NEC Wire Coding

Figure 7-6: Cable Substitution Hierarchy

REVIEW QUESTIONSREVIEW QUESTIONS

What is the purpose of the ANSI/TIA/EIA T568A standard?

11


Name the six items covered by the ANSI/TIA/EIA standard.

22


State the purpose of the ANSI/TIA/EIA Telecommunications Pathways and Spaces certification.

33


What is the ANSI/TIA/EIA 570 standard and how is it different from the T568A standard?

44


Name the three items that the ANSI/TIA/EIA 606 Administration Standards for the Telecommunications Infrastructure of Commercial Buildings standard recommends for documentation of a telecommunications cabling system in a commercial building.

55


List five types of telecommunications pathways.

66


List four types of telecommunications spaces.

77


How did the FCC Part 68 decision affect the telecommunications network in the United States?

88


Which bonding and grounding guidelines take precedence in a given application, ANSI/TIA/EIA standards or national/local electrical code standards?

99

Documents

OBJECTIVES - DMC Cisco Networking Academyacademy.delmar.edu/Courses/ITNW2313/ChGuides/DCIG_Ch-07.pdfOBJECTIVES 1. Describe various ANSI/TIA/EIA standards for commercial buildings and