SAES-T-625 PDF - Inter and Intra Building Fiber Optic Communication Cables - PDFYAR

This article is about SAES-T-625 which is about Inter and Intra Building Fiber Optic Communication Cables and download SAES-T-625 PDF for telecommunication and electrical engineers, supervisors and project managers, telecom QCs, telecom QC Supervisors. This is saudi aramco standards of Telecommunication Engineering based on international codes and standards and useful for telecom and electronics engineering knowledge to get job as engineers, QC Supervisors and QC managers, Engineering managers and technicians.

SAES-T-625 pDF Download

SAES-T-625

Download saes-t-625 pdf

Inter and Intra Building Fiber Optic Communication Cables

The SAES-T-625 Standard provides mandatory requirements for multimode fiber optic cable parameters in on-premises inter-building and intra-building installations for data communications and local area network applications. It also states that other applications such as PBXs, video, and various multiplexing uses for short-length links may also be supported by this standard.

The parameters specified in this standard are applicable for different transmission speeds and distances using multimode fiber optic cables. Specifically, it covers:

Transmission speed up to 155 megabits per second (Mbps) for distances up to 2 km (OM1).
Transmission speed up to 1 Gigabit per second (Gbps) for distances up to 550 m (OM2).
Transmission speed up to 10 Gigabit per second (Gbps) for distances up to 300 m (OM3).

It’s important to note that for higher speeds and longer distances beyond the specifications mentioned above, single-mode fiber optic cables should be used. This implies that single-mode fiber optic cables are required for achieving higher transmission speeds and longer distances in such scenarios.

Industry Codes and Standards For Inter and Intra Building Fiber Optic Communication Cables

The industry codes and standards related to the telecommunications and fiber optic cable industry include:

International Telecommunications Union – Telecommunications Standardization Sector (ITU-T):

G.652: Characteristics of a Single-Mode Optical Fiber Cable.
G.653: Characteristics of a Dispersion-Shifted Single-Mode Optical Fiber Cable.
G.655: Characteristics of a Non-zero Dispersion Shifted Single-Mode Optical Fiber Cable.

American National Standard Institute (ANSI):

ANSI C2: National Electrical Safety Code (NESC).

Electronic Industries Association (EIA):

EIA/TIA-492: Detail Specification for 62.5/125 micron Class Ia Multimode, Graded-Index Optical Waveguide Fiber.
EIA/TIA-492A: Sectional Specification for Class Ia Multimode, Graded-Index Optical Waveguide Fiber.
EIA/RS-455: Standard Test Procedures for Fiber Series Optic Fiber, Cables, and Addendum (as referenced in this standard).

Other relevant codes and standards include:

National Electrical Code (NEC) – 2008 Edition.
National Fire Code (NFC).
Rural Electrification Administration (REA) PE-90: Specification for Filled Fiber Optic Cable (as referenced in this standard).

Additionally, the Telecommunications Distribution Methods Manual (TDMM) of the Building Industry Consulting Service International (BICSI) provides guidance and standards for the distribution of telecommunications infrastructure.

Basic Design Requirements

The basic design requirements for fiber optic cables in inter-building and intra-building installations, as specified in Saudi Aramco Engineering Standard SAES-T-624, are as follows:

Fiber Type:

Single-mode optical fiber (Dispersion-Shifted or Non-Zero Dispersion-Shifted) in accordance with applicable ITU-T G.652, G.653, G.655 standards.
62.5 μm (core)/125 μm (cladding) multimode, graded-index optical waveguide fiber in accordance with applicable EIA/TIA-455 series.
50 μm (core)/125 μm (cladding) multimode, graded-index optical waveguide fiber in accordance with the latest version of ITU-T G.651.

Fiber Construction:

The optical fibers shall have a solid glass cylindrical core and cladding.
The fibers shall be covered by Ultra Violet (UV) acrylate or equivalent coating.

Cable Type:

Fiber optic cables installed within buildings shall be air core, Optical Fiber Non conductive Plenum (OFNP), or Optical Fiber Non conductive Riser (OFNR) type.
The cables may have non-metallic moisture barriers.
The cables shall be suitable for the purpose and resistant to the spread of fire.
They should comply with the NEC article 770 Section 770-26, installed in accordance with Section 770-110, and marked as per Table 770-179.

Inter-Building or Entrance Cables:

Inter-building or entrance fiber optic cables may be air core or polyethylene sheath filled cables.
Filled cables and cables with metallic strength members or moisture barriers shall be terminated and grounded according to NEC codes.

Fiber Core and Cladding Parameters:

Multimode fiber cores shall have graded (parabolic) refractive index profiles with core diameters of 62.5 ± 3.0 micrometers.
The core non-circularity shall not exceed 6%.
The cladding diameter shall be 125.0 ± 2.0 micrometers.
The cladding concentricity error shall not exceed 6%.
The cladding non-circularity shall not exceed 2%.
The numerical aperture of the fiber shall be 0.275 ± 0.015.

Fiber Attenuation and Bandwidth:

The attenuation of the fibers within the cable shall not exceed 4 dB/km at 850 nanometers and 1.5 dB/km at 1300 nanometers.
Attenuation discontinuities shall not exceed 0.2 dB at 1300 ± 20 nanometers.
The minimum bandwidth of the fiber cable shall be 160 MHz-km @ 850 nanometers and 500 MHz-km @ 1300 nanometers.

Fiber Coating:

The optical fibers shall be coated with one or more plastic materials to preserve the intrinsic strength of the glass.
The coating diameter shall be at least 250.0 ± 15.0 micrometers.
The coating concentricity error shall not exceed 16%.

These requirements ensure the use of appropriate fiber optic cables for inter-building and intra-building installations, considering the transmission speeds, distances, fiber types, and compliance with relevant industry standards and codes.

FAQs about SAES-T-625 pDF Download

Q1: What is the scope of SAES-T-625 Standard?

A: SAES-T-625 Standard provides mandatory requirements for the parameters of multimode fiber optic cables used in on-premises inter-building and intra-building installations for data communications and local area network applications.

Q2: Which applications are supported by SAES-T-625 Standard?

A: SAES-T-625 Standard primarily focuses on data communications and local area network applications. Additionally, it states that other applications such as PBXs, video, and various multiplexing uses for short-length links may also be supported within the specified parameters.

Q3: What are the transmission speeds and distances covered by the standard?

A: The standard specifies parameters for different transmission speeds and distances using multimode fiber optic cables. It covers transmission speeds of up to 155 Mbps for distances up to 2 km (OM1), up to 1 Gbps for distances up to 550 m (OM2), and up to 10 Gbps for distances up to 300 m (OM3).

Q4: When should single-mode fiber optic cables be used?

A: Single-mode fiber optic cables are required for achieving higher transmission speeds and longer distances beyond the specifications provided in the SAES-T-625 Standard. For applications that require transmission speeds greater than 10 Gbps or distances longer than the specified limits, single-mode fiber optic cables should be used.

Q5: What is the significance of OM1, OM2, and OM3 designations?

A: OM1, OM2, and OM3 are designations for different types of multimode fiber optic cables. They represent different categories of cables with varying performance characteristics, such as bandwidth, attenuation, and transmission distance. These designations help ensure compatibility and appropriate selection of cables based on specific application requirements.

Q6: What are the advantages of using multimode fiber optic cables?

A: Multimode fiber optic cables offer cost-effective solutions for shorter-distance data communication applications. They are suitable for local area networks (LANs), inter-building connections, and short-distance links where high-speed data transmission is required within the specified limits of the standard.

Q7: Can multimode fiber optic cables be used for longer distances or higher speeds?

A: Multimode fiber optic cables have limitations in terms of transmission distances and speeds. Beyond the distances and speeds specified in the standard, single-mode fiber optic cables are necessary to achieve higher transmission rates and longer distances with better performance and minimal signal degradation.

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SAES-T-625 PDF – Inter and Intra Building Fiber Optic Communication Cables