What is CO-OSP? • Customer Owned Outside Plant. • “Telecommunications infrastructure designed for installation exterior to buildings”. ANSI/TIA/EIAA . Active, Most Current. BUNDLE AND SAVE: Item is contained in these product bundles. EN. Additional Comments: ANSI APPROVED. Format. TIA/EIA Engineering Standards and Publications are designed to serve the public Outside Plant Telecommunications Cabling Standard (ANSI/TIA/EIA).

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Work on the standard began with the Electronic Industries Alliance EIAto define standards for telecommunications cabling systems. Telecommunications pathways in tunnels incorporate the following: Figure 2 illustrates a typical OSP cabling layout.

TIA/EIA – Wikipedia

A bonding 51 wire is connected between all of the cables in the closure. Multiple pair connectors modules may be used to splice up to twenty-five wire pairs, and typically splice multiple wires, from 26 to 22 or 19 AWG. All bends shall be sweeps with a minimum radius of six times the internal diameter for conduits up to 2 inch and ten times the internal diameter for all conduits larger than 2 inch.

These documents are listed in table 3.

The air conditioning units may be internally rack mounted or be physically attached to the exterior of the cabinet. The facility may require venting of gaseous vapors.


The housing provides for the appropriate entry of the cables from either or both ends. Optional connection facility that is cabled between the equipment outlet and Distributor B or Distributor C in a hierarchical star topology.

The width of this zone, if not specified by the state damage prevention law, should be mm 18 in. The person, company, or business that does the excavating. Precast maintenance holes and handholes are generally placed in new construction. The original idea in wiring modular connectors, as seen in the registered jackswas that the first pair would go in the center positions, the next pair on the next outermost ones, and so on.

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Any enclosed channel designed for holding wires or cables.

HS, designed for deliberate heavy vehicular traffic. These devices, however, cannot be relied upon to determine the precise location of the underground facility.

In the absence of applicable codes, follow the NESC. Of the two, underground pathways e. If properly installed, these cables can be installed in less time than lashing a conventional duct cable to a metallic messenger. Where access to both wireline and wireless services is required, the entrance facilities may require adjustment in size, quantity, and location.

An area used for housing the installation and termination of telecommunications equipment and cable, e. They shall not produce significant galvanic corrosion effects, in wet or humid conditions, or on other metals likely to be present in pedestal terminal closures or aerial cable terminals. Handholes shall have provisions for drainage e.

The method for labeling, identification, documentation and usage needed to implement moves, additions and changes of the telecommunications infrastructure. For other duct applications, depth requirements for buried plant shall apply. They are typically located inside cross-connect cabinets, where a feeder cable s enter and one or more distribution cables exit. Land acquisition rights and permission should be obtained before installation work begins.


These documents can be obtained through contact with the associated standards body or designated representatives. An enclosed passageway, usually placed between buildings, for the distribution of utility services. These documents are listed in table 4. Each situation must be evaluated in accordance with the tunnel’s basic use, environment, and presence of other utilities to minimize the possibility of damage to the cable. Provisions are made to keep the encapsulant away from direct contact with the fiber.

Entrance Facilities General Seismic considerations Entrance location considerations Entrance pathway facilities Underground 28 Underground entrance preplanning shall include land development, topographical limitations, and grading of underground facility to permit drainage. The standard specifies how to connect eight-conductor ohm balanced twisted-pair cabling, such as Category 5 cableto 8P8C modular connectors often called RJ45 connectors.

Slope sleeves downward 10 mm per m o. All standards are subject to revision, and parties to agreements based on this Standard are encouraged to investigate the possibility of applying the most recent editions of the standards published by them. The facility owner is responsible for the engineering and construction of the railroad crossing, including preparing a subsurface profile of the construction site.

They accommodate cable, splice closures, racking systems, and electronic equipment e. It is desirable that terminal blocks used for building entrance terminals be of the IDC type.

An assembly of one or more insulated conductors or optical fibers, within an enveloping sheath.