ISO/IEC 14763-3:2024

Introduction

This is an extract of the most recent publication of the standard ISO/IEC 14763-3 in 2024. Information technology - Implementation and operation of customer premises cabling - Part 3: Testing of optical fiber cabling. To purchase the publication, please visit ISO Store.

Solution

Table

Cable type	Adapter loss embedded (dB)	Adapter loss first and last (dB)	Splice loss	Fiber loss @ 850nm (dB/km)	Fiber loss @ 1300nm (dB/km)	Fiber loss @ 1310nm (dB/km)	Fiber loss @ 1550nm (dB/km)	Length (m)
OS1	0.75	0.7	0.3	-	-	1.0	1.0	5000
OS2	0.75	0.7	0.3	-	-	0.4	0.4	5000
OM1, OM2, OM3, OM4, OM5	0.75	0.45	0.3	3.5	1.5	-	-	2000

Examples

Example 1 - Multi-mode channel

Consider a cabling channel comprising:

• optical fiber conforming to OM4 of ISO/IEC 11801-1;

• a total length including equipment cords of 100 m;

• two panel connections in accordance with ISO/IEC 11801-1;

• equipment cords terminated with connectors in accordance with ISO/IEC 11801-1.

The channel limit at 850 nm would be: (0,1 × 3,5 dB) + (2 × 0,75 dB) = 1,85 dB

The channel limit at 1 300 nm would be: (0,1 × 1,5 dB) + (2 × 0,75 dB) = 1,65 dB

Example 2 - Single-mode channel

Consider a cabling channel comprising:

• optical fiber conforming to OS2 of ISO/IEC 11801-1;

• a total length including equipment cords of 500 m;

• two panel connections in accordance with ISO/IEC 11801-1;

• two optical fiber splices in accordance with ISO/IEC 11801-1;

• equipment cords terminated with connectors in accordance with ISO/IEC 11801-1.

The channel limit at 1 310 nm would be: (0,5 × 0,4 dB) + (2 × 0,75 dB) + (2 × 0,3 dB) = 2,3 dB

The channel limit at 1 550 nm would be: (0,5 × 0,4 dB) + (2 × 0,75 dB) + (2 × 0,3 dB)= 2,3 dB

Example 3 - Multi-mode permanent link

Consider a permanent link comprising:

• optical fiber conforming to OM3 of ISO/IEC 11801-1;

• a total length of 100 m;

• two panel connections in accordance with ISO/IEC 11801-1.

Using the 1-jumper reference method, the limit would be as follows:

• at 850 nm: (0,1 × 3,5 dB) + (2 × 0,45 dB) = 1,25 dB;

• at 1 300 nm: (0,1 × 1,5 dB) + (2 × 0,45 dB) = 1,05 dB

Example 4 - Single-mode permanent link

Consider a permanent link comprising:

• optical fiber conforming to OS2 of ISO/IEC 11801-1;

• a total length of 500 m;

• two panel connections in accordance with ISO/IEC 11801-1;

• two optical fiber splices in accordance with ISO/IEC 11801-1.

Using the enhanced 3-jumper or 1-jumper reference method, the limit would be as follows:

• at 1 310 nm: (0,5 × 0,4 dB) + (2 × 0,7 dB) + (2 × 0,3 dB) = 2,2 dB;

• at 1 550 nm: (0,5 × 0,4 dB) +(2 × 0,7 dB) + (2 × 0,3 dB) = 2,2 dB