Juniper EX2300 Series Hardware Guide

• EX8208—Hardware Compability Tool page for EX8208
• EX8216—Hardware Compability Tool page for EX8216
• EX9251—Hardware Compability Tool page for EX9251
• EX9253—Hardware Compability Tool page for EX9253
Standards Supported by These Cables
The cables comply with the following standards:
• SFP mechanical standard SFF-843— see p://p.seagate.com/s/SFF-8431.PDF.
• Electrical interface standard SFF-8432— see p://p.seagate.com/s/SFF-8432.PDF.
• SFP+ Mul-Source Alliance (MSA) standards
Understanding EX Series Switches Fiber-Opc Cable Signal Loss,
Aenuaon, and Dispersion
IN THIS SECTION
Signal Loss in Mulmode and Single-Mode Fiber-Opc Cable | 79
Aenuaon and Dispersion in Fiber-Opc Cable | 80
To determine the power budget and power margin needed for ber-opc connecons, you need to
understand how signal loss, aenuaon, and dispersion aect transmission. EX Series switches use
various types of network cable, including mulmode and single-mode ber-opc cable.
Signal Loss in Mulmode and Single-Mode Fiber-Opc Cable
Mulmode ber is large enough in diameter to allow rays of light to reect internally (bounce o the
walls of the ber). Interfaces with mulmode opcs typically use LEDs as light sources. However, LEDs
are not coherent light sources. They spray varying wavelengths of light into the mulmode ber, which
reects the light at dierent angles. Light rays travel in jagged lines through a mulmode ber, causing
signal dispersion. When light traveling in the ber core radiates into the ber cladding (layers of lower
refracve index material in close contact with a core material of higher refracve index), higher-order
79

Juniper EX2300 Series Specifications

General

Brand	Juniper
Model	EX2300 Series
Category	Switch
Language	English