ANSI/TIA-758-B
Updated 2026-10-25
Data records
- ANSI/TIA-758-B (2012) describes a splice closure as the housing together with its bonding hardware and sealing materials, which must restore the electrical and mechanical integrity of the cable sheath.
- Clause 6.2.5 of ANSI/TIA-758-B (2012) makes continuity of the center conductor and the shield the only mandatory field test for outside plant coaxial cable; attenuation, length, impedance, return loss and loop resistance may be measured but carry no pass or fail criteria.
- Clause 6.3.8 of ANSI/TIA-758-B (2012) requires outside plant optical fiber cabling to be field tested as the generic cabling standard ANSI/TIA-568-C.0 specifies, which also governs its minimum bend radius.
- Clause 6.1.5 of ANSI/TIA-758-B (2012) lists the basic field tests for outside plant twisted-pair cabling: loop resistance, wire map, continuity to the far end, and checks for shorts, crossed, reversed and split pairs. It sets no pass or fail limits for them.
- For copper plant that will carry VDSL-class service, ANSI/TIA-758-B (2012) adds capacitive balance, attenuation, longitudinal balance, metallic and impulse noise measurements, and time domain reflectometry to locate bad splices, split pairs and bridged taps.
- ANSI/TIA-758-B (2012) recommends fusion splicing for outside plant optical fiber because of its environmental stability, and requires each splice to be protected by a sleeve and tray inside a closure.
- Clause 5.1.3.1 of ANSI/TIA-758-B (2012) defers aerial plant to the applicable codes, or failing those the National Electrical Safety Code and the ANSI wood pole standard, and lists design items from pole class and guying to messenger tension and sag.
- Normative Annex A of ANSI/TIA-758-B (2012) defines the symbols for customer-owned outside plant drawings and requires each drawing set to carry a legend of the symbols used.
- Clause B.3 of ANSI/TIA-758-B (2012) recommends that as-built records note any horizontal deviation outside the tolerance zone and any depth that falls short of, or well exceeds, the design minimum.
- Clause B.2.10 of ANSI/TIA-758-B (2012) sets out damage prevention practice: excavator notice, pre-marking of proposed digs, a tolerance zone in which only hand or nondestructive tools are used, and owner marking of facilities.
- Table 11 of ANSI/TIA-758-B (2012) sets mandatory minimum depths of cover by class of telecommunications plant, and where that depth cannot be reached the plant needs added physical protection and a case-by-case review.
- In a trench shared with power cable, ANSI/TIA-758-B (2012) requires the greater of the telecommunications depth in Table 11 and the power-voltage depth in Table 12, the latter drawn from the National Electrical Safety Code.
- Clause B.2.2.4 of ANSI/TIA-758-B (2012) recommends identifying buried routes with permanent above-ground markers, buried warning tape or both, and keys tape and marks to the uniform utility color code reproduced in Table 14.
- Normative Annex B of ANSI/TIA-758-B (2012) addresses where below-ground cable plant is placed and how it is protected. Left outside it are methods of installation, plant already in place, and aerial, in-building, submarine and navigable-waterway cable.
- Clause 4.6 of ANSI/TIA-758-B (2012) points bonding and grounding inside buildings to the joint standard ANSI-J-STD-607 in its 2002 revision A, and bonding between buildings to the National Electrical Safety Code, IEEE C2-2007.
- Compared with the prior edition, ANSI/TIA-758-B (2012) adds guidance on locating and protecting below-ground cable plant, drawn from TIA-590-A, updates its references, and drops the annex on application cabling lengths, which moved to the generic cabling standard.
- ANSI/TIA-758-B (2012) limits free-breathing fiber closures to aerial or ground-level sites without immersion or chemical risk, and requires hermetically sealed closures to carry an air valve so the seal can be pressurized and checked in the field.
- Clauses 5.1.1.2.3 to 5.1.1.2.5 of ANSI/TIA-758-B (2012) cap the length of a conduit section between pull points, cap the right-angle bends in a section, require a pull box for a reverse bend, and set a minimum sweep radius as a multiple of the conduit internal diameter.
- Clause 5.1.1.2.2 of ANSI/TIA-758-B (2012) ties each nonmetallic conduit type to its NEMA TC specification and requires concrete encasement of nonmetallic conduit under vehicle traffic or at sharper sweeps, with a minimum concrete strength.
- Clause 6.1.2 of ANSI/TIA-758-B (2012) covers outside plant connecting hardware, including environmental operating ranges, test access to each pair without disturbing the wire, tip and ring identification, and primary protection for protected terminals.
- Where service continuity matters, ANSI/TIA-758-B (2012) recommends diverse entrance points, ideally on different streets, and diverse routes kept as far apart as possible.
- ANSI/TIA-758-B (2012) calls for ducts to slope for drainage away from buildings and toward maintenance holes, and requires ducts to be sealed against liquids and gases at every maintenance hole and building entrance.
- Clause 5.4.2 of ANSI/TIA-758-B (2012) sets a minimum count of large entrance conduits plus a spare at each entrance point, and requires them to extend past the foundation into undisturbed earth, slope toward the exterior, be reamed and bushed, and be plugged against gas, water and vermin.
- Clause 5.2.5 of ANSI/TIA-758-B (2012) requires entrance facility designs to meet the seismic zone, the access and service providers to be contacted, and the positions of other utilities to be considered.
- Clause 6.3.7 of ANSI/TIA-758-B (2012) requires every metallic component of an optical fiber cable other than the transmission media to be bonded together and to ground, while all-dielectric cable needs no grounding.
- Clause 7.4.2.1 of ANSI/TIA-758-B (2012) requires outside plant fiber splice closures to be re-enterable and watertight, sized for the splice count and cable entries, and able to bond and ground cable shields.
- ANSI/TIA-758-B (2012) sets no optical loss limits of its own: outside plant fiber cable performance, splice insertion and return loss, and connectors are all referred to ANSI/TIA-568-C.3.
- Clause 5.2.2 of ANSI/TIA-758-B (2012) forbids a handhole from substituting for a maintenance hole or serving a main conduit system, requires it to drain, and caps its dimensions.
- Clause 5.2.1.2 of ANSI/TIA-758-B (2012) requires a maintenance hole wherever a duct section would otherwise exceed its maximum length and recommends keeping holes clear of intersection curb radii.
- Clause 5.2.1.1 of ANSI/TIA-758-B (2012) requires a maintenance hole to have a draining gravel base, a lid rated for traffic where in a roadway, grounded corrosion-resistant cable racks, pulling irons and a sump, and bars sharing it with electrical facilities other than power for telecommunications equipment.
- ANSI/TIA-758-B (2012) uses shall for mandatory requirements and should, may or desirable for advisory ones, and its Annexes A and B are normative while Annex C is informative.
- Clause 4.7 of ANSI/TIA-758-B (2012) applies the MICE system, rating mechanical, ingress, climatic and electromagnetic conditions, and advises that a component crossing between environments suit the more severe one.
- ANSI/TIA-758-B (2012) prefers underground or direct-buried pathways to aerial ones, and underground duct to direct burial, and requires pathways to be planned for both present and expected wireline and wireless needs.
- ANSI/TIA-758-B (2012) recognizes four outside plant pathway types: aerial, direct-buried, underground duct and tunnel.
- Clauses 5.2.3 and 5.2.4 of ANSI/TIA-758-B (2012) require pedestals, cabinets and vaults to pass salt spray, ultraviolet and flame tests, and assign vaults to load classes ranging from pedestrian areas to deliberate heavy vehicle traffic.
- Clause 6.4.1 of ANSI/TIA-758-B (2012) requires air-core copper cable in subsurface pathways to be kept under dry air pressure, with a minimum that rises with hydrostatic head, and recommends venting rather than pressurizing aerial air-core cable.
- Clause 4.4 of ANSI/TIA-758-B (2012) recognizes balanced twisted-pair cable, multimode and single-mode optical fiber, and coaxial cable for outside plant use.
- Clause 4.3 of ANSI/TIA-758-B (2012) follows the generic cabling structure of the TIA family, treats the campus backbone as the second or third cabling subsystem, and recommends a hierarchical star for large campuses.
- Clause 6.1.1 of ANSI/TIA-758-B (2012) draws outside plant copper cable from the ICEA cable specifications and uses Table 1 to show where filled and air-core designs suit aerial, underground and direct-buried placement.
Elsewhere in the family
- Customer-Owned Outside Plant Telecommunications Infrastructure Standard more on this entry on Testing Reference
Sources
- ANSI/TIA-758-B, Customer-Owned Outside Plant Telecommunications Infrastructure Standard, 2012 edition, TIA. Cited: clause 7.3.5; clause 6.2.5; clause 6.3.7 and 6.3.8; clause 6.1.5; clause 6.3.4.1.1.1 and 6.3.4.1.4; clause 5.1.3.1; clause A.1; clause B.3; clause B.2.10; clause B.2.2.1; clause B.2.2.2; clause B.2.2.4 and B.2.2.4.1; clause B.1; clause 4.6; clause Foreword; clause 7.4.2.4 to 7.4.2.6; clause 5.1.1.2.3 to 5.1.1.2.5; clause 5.1.1.2.2; clause 6.1.2; clause 4.3.2; clause 5.1.1.2.6 and 5.1.1.2.8; clause 5.4.2; clause 5.2.5; clause 6.3.3.3 and 6.3.7; clause 7.4.2.1; clause 6.3.2, 6.3.4.1.2, 6.3.4.1.3 and 6.3.4.2; clause 5.2.2; clause 5.2.1.2; clause 5.2.1.1; clause Purpose; clause 4.7; clause 5.1; clause 1; clause 5.2.3 and 5.2.4; clause 6.4.1; clause 4.4; clause 4.3; clause 6.1.1. Held as: Purchased single-user copy.
Obtaining the documents
- ANSI/TIA-758-B (2012): publisher catalog or sales page
Changelog (86 entries)
| Date | Revision | Change |
|---|---|---|
| 2026-10-25 | created (std.tia-758-b.definition.splice-closure) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.definition.splice-closure) | |
| 2026-10-25 | created (std.tia-758-b.field-test.coaxial) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.field-test.coaxial) | |
| 2026-10-25 | created (std.tia-758-b.field-test.optical-fiber) | |
| 2026-10-25 | revised (std.tia-758-b.field-test.optical-fiber) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.field-test.optical-fiber) | |
| 2026-10-25 | created (std.tia-758-b.field-test.twisted-pair) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.field-test.twisted-pair) | |
| 2026-10-25 | created (std.tia-758-b.field-test.vdsl-service) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.field-test.vdsl-service) | |
| 2026-10-25 | created (std.tia-758-b.method.fusion-splicing) | |
| 2026-10-25 | revised (std.tia-758-b.method.fusion-splicing) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.method.fusion-splicing) | |
| 2026-10-25 | created (std.tia-758-b.structure.aerial) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.structure.aerial) | |
| 2026-10-25 | created (std.tia-758-b.structure.annex-a-symbols) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.structure.annex-a-symbols) | |
| 2026-10-25 | created (std.tia-758-b.structure.annex-b-as-built) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.structure.annex-b-as-built) | |
| 2026-10-25 | created (std.tia-758-b.structure.annex-b-damage-prevention) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.structure.annex-b-damage-prevention) | |
| 2026-10-25 | created (std.tia-758-b.structure.annex-b-depth-of-cover) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.structure.annex-b-depth-of-cover) | |
| 2026-10-25 | created (std.tia-758-b.structure.annex-b-joint-trench) | |
| 2026-10-25 | revised (std.tia-758-b.structure.annex-b-joint-trench) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.structure.annex-b-joint-trench) | |
| 2026-10-25 | created (std.tia-758-b.structure.annex-b-marking) | |
| 2026-10-25 | revised (std.tia-758-b.structure.annex-b-marking) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.structure.annex-b-marking) | |
| 2026-10-25 | created (std.tia-758-b.structure.annex-b-scope) | |
| 2026-10-25 | revised (std.tia-758-b.structure.annex-b-scope) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.structure.annex-b-scope) | |
| 2026-10-25 | created (std.tia-758-b.structure.bonding-grounding) | |
| 2026-10-25 | revised (std.tia-758-b.structure.bonding-grounding) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.structure.bonding-grounding) | |
| 2026-10-25 | created (std.tia-758-b.structure.changes-from-758-a) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.structure.changes-from-758-a) | |
| 2026-10-25 | created (std.tia-758-b.structure.closure-types) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.structure.closure-types) | |
| 2026-10-25 | created (std.tia-758-b.structure.conduit-geometry) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.structure.conduit-geometry) | |
| 2026-10-25 | created (std.tia-758-b.structure.conduit-types) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.structure.conduit-types) | |
| 2026-10-25 | created (std.tia-758-b.structure.connecting-hardware) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.structure.connecting-hardware) | |
| 2026-10-25 | created (std.tia-758-b.structure.diversity) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.structure.diversity) | |
| 2026-10-25 | created (std.tia-758-b.structure.duct-sealing-drainage) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.structure.duct-sealing-drainage) | |
| 2026-10-25 | created (std.tia-758-b.structure.entrance-conduits) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.structure.entrance-conduits) | |
| 2026-10-25 | created (std.tia-758-b.structure.entrance-facilities) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.structure.entrance-facilities) | |
| 2026-10-25 | created (std.tia-758-b.structure.fiber-cable-metallic-parts) | |
| 2026-10-25 | revised (std.tia-758-b.structure.fiber-cable-metallic-parts) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.structure.fiber-cable-metallic-parts) | |
| 2026-10-25 | created (std.tia-758-b.structure.fiber-closures) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.structure.fiber-closures) | |
| 2026-10-25 | created (std.tia-758-b.structure.fiber-performance-reference) | |
| 2026-10-25 | revised (std.tia-758-b.structure.fiber-performance-reference) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.structure.fiber-performance-reference) | |
| 2026-10-25 | created (std.tia-758-b.structure.handholes) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.structure.handholes) | |
| 2026-10-25 | created (std.tia-758-b.structure.maintenance-hole-placement) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.structure.maintenance-hole-placement) | |
| 2026-10-25 | created (std.tia-758-b.structure.maintenance-holes) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.structure.maintenance-holes) | |
| 2026-10-25 | created (std.tia-758-b.structure.mandatory-language) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.structure.mandatory-language) | |
| 2026-10-25 | created (std.tia-758-b.structure.mice) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.structure.mice) | |
| 2026-10-25 | created (std.tia-758-b.structure.pathway-preference) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.structure.pathway-preference) | |
| 2026-10-25 | created (std.tia-758-b.structure.pathway-types) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.structure.pathway-types) | |
| 2026-10-25 | created (std.tia-758-b.structure.pedestals-and-vaults) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.structure.pedestals-and-vaults) | |
| 2026-10-25 | created (std.tia-758-b.structure.pressurization) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.structure.pressurization) | |
| 2026-10-25 | created (std.tia-758-b.structure.recognized-media) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.structure.recognized-media) | |
| 2026-10-25 | created (std.tia-758-b.structure.topology) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.structure.topology) | |
| 2026-10-25 | created (std.tia-758-b.structure.twisted-pair-cable) | |
| 2026-10-25 | review_status unreviewed -> software_reviewed (std.tia-758-b.structure.twisted-pair-cable) |
Cite this page
Cite the governing standard for the fact itself; cite this page as the finding aid.
"ANSI/TIA-758-B." Fiber Optic Reference. 2026-10-25. https://www.fiberopticreference.com/standards/tia-758-b/.
Fiber Optic Reference, ANSI/TIA-758-B (Oct. 25, 2026), https://www.fiberopticreference.com/standards/tia-758-b/.
@misc{etr-standards-tia-758-b,
title = {ANSI/TIA-758-B},
howpublished = {\url{https://www.fiberopticreference.com/standards/tia-758-b/}},
organization = {Fiber Optic Reference},
publisher = {Fiber Optic Reference},
year = {2026},
note = {last substantive change 2026-10-25}
}{{cite web |title=ANSI/TIA-758-B |website=Fiber Optic Reference |publisher=Fiber Optic Reference |url=https://www.fiberopticreference.com/standards/tia-758-b/ |date=2026-10-25 |access-date=}}