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/OS1a	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

*OS1, OM1 and OM2 are no longer to be used with new installations.