Network Cable Specifications For Ex2200 Switches; And Dispersion; Signal Loss In Multimode And Single-Mode Fiber-Optic Cable - Juniper EX2200 Hardware Manual

Network Cable Specifications for EX2200 Switches

Related
Documentation
Understanding EX Series Switches Fiber-Optic Cable Signal Loss, Attenuation, and
Dispersion

Signal Loss in Multimode and Single-Mode Fiber-Optic Cable

Copyright © 2016, Juniper Networks, Inc.
EX2200 switches have interfaces that use various types of network cables.
For instructions on connecting the switch to a network for out-of-band management
using an Ethernet cable with an RJ-45 connector, see
for Out-of-Band Management" on page
For instructions on connecting the switch to a management console using an Ethernet
cable with an RJ-45 connector, see
Using an RJ-45 Connector" on page
For instructions on connecting a fiber-optic cable to the switch, see
Fiber-Optic Cable to a Switch" on page
Management Port Connector Pinout Information for an EX2200 Switch on page 108
Console Port Connector Pinout Information for an EX Series Switch on page 105
EX2200 Switches Hardware Overview on page 3
To determine the power budget and power margin needed for fiber-optic connections,
you need to understand how signal loss, attenuation, and dispersion affect transmission.
EX Series Switches use various types of network cable, including multimode and
single-mode fiber-optic cable.
Signal Loss in Multimode and Single-Mode Fiber-Optic Cable on page 103
Attenuation and Dispersion in Fiber-Optic Cable on page 104
Multimode fiber is large enough in diameter to allow rays of light to reflect internally
(bounce off the walls of the fiber). Interfaces with multimode optics typically use LEDs
as light sources. However, LEDs are not coherent light sources. They spray varying
wavelengths of light into the multimode fiber, which reflects the light at different angles.
Light rays travel in jagged lines through a multimode fiber, causing signal dispersion.
When light traveling in the fiber core radiates into the fiber cladding (layers of lower
refractive index material in close contact with a core material of higher refractive index),
higher-order mode loss (HOL) occurs. Together, these factors reduce the transmission
distance of multimode fiber compared to that of single-mode fiber.
Single-mode fiber is so small in diameter that rays of light reflect internally through one
layer only. Interfaces with single-mode optics use lasers as light sources. Lasers generate
a single wavelength of light, which travels in a straight line through the single-mode fiber.
Compared to multimode fiber, single-mode fiber has a higher bandwidth and can carry
signals for longer distances. It is consequently more expensive.
Chapter 8: Transceiver and Cable Specifications
"Connecting a Switch to a Network
155.
"Connecting a Switch to a Management Console by
157.
160.
"Connecting a
103