Ramick Computing Ltd | Fusion Splicing

Fibre Optic Testing

Having had a premises fibre network installed and terminated within a commercial building, as the general contractor and/or building owner, you will want assurance that the cabling infrastructure has been properly installed.

So, how do you tell a good fibre link from a bad one? Furthermore, what's the definition of a good fibre? These questions are common in this industry.

To help you answer these questions, Ramick Computing adhere to the standards.

Part 1 (General Requirements) of TIA/EIA-568-B.1 “Commercial Building Telecommunications Cabling Standard” rates the quality of a link based on several performance characteristics. This classification or definition of quality, based on the performance characteristics for horizontal, backbone, and centralized applications that are listed in the table below is widely accepted throughout the industry. BICSI has adopted this definition and references it in the organization's Telecommunication Distribution Methods Manual (TDMM).

Cabling Application	Link Loss Budget (dB)	Wavelength (nm)	Length (m)
Horizontal, MM	≤ 2.0	850 or 1300	≤ 90
Backbone, MM	≤ 3.5/km + 0.75/conn + 0.3/spl	850	≤ 2000
Backbone, MM	≤ 1.5/km + 0.75/conn + 0.3/spl	1300	≤ 2000
Backbone, SM	≤ 1.0/km + 0.75/conn + 0.3/spl	1310	≤ 3000
Backbone, SM	≤ 1.0/km + 0.75/conn + 0.3/spl	1550	≤ 3000
Centralised, MM	≤ 3.3	850 or 1300	≤ 300

Table 1

The fibre link test procedure consists of three steps:

Measure the optical link loss at the appropriate wavelength(s) as dictated by the application and fibre type.
Measure the link length.
Compare the results to the link loss budget, which represents the uppermost limit above which a fibre is considered no longer usable

Fibre Optics | Fibre Termination | Fusion Splicing | OTDR Testing | Installation

View Cart

Complete Order