Srx1400 Services Gateway Network Cable Guidelines; Signal Loss In Multimode And Single-Mode Fiber-Optic Cable For The Srx1400 Services Gateway; Console Port Cable And Wire Specifications For The Srx1400 Services - Juniper SRX1400 Hardware Manual

SRX1400 Services Gateway Hardware Guide
Related
Documentation

SRX1400 Services Gateway Network Cable Guidelines

Signal Loss in Multimode and Single-Mode Fiber-Optic Cable for the SRX1400 Services Gateway

Related
Documentation
194
equipment, resulting in an electrical hazard. It is particularly important to provide a properly
grounded and shielded environment and to use electrical surge-suppression devices.
Signal Loss in Multimode and Single-Mode Fiber-Optic Cable for the SRX1400 Services
Gateway on page 194
Attenuation and Dispersion in Fiber-Optic Cable for the SRX1400 Services Gateway
on page 195
Calculating the Power Budget for Fiber-Optic Cable for the SRX1400 Services Gateway
on page 196
Calculating the Power Margin for Fiber-Optic Cable for the SRX1400 Services Gateway
on page 196
This topic includes the following sections:
Signal Loss in Multimode and Single-Mode Fiber-Optic Cable for the SRX1400 Services
Gateway on page 194
Attenuation and Dispersion in Fiber-Optic Cable for the SRX1400 Services
Gateway on page 195
Calculating the Power Budget for Fiber-Optic Cable for the SRX1400 Services
Gateway on page 196
Calculating the Power Margin for Fiber-Optic Cable for the SRX1400 Services
Gateway on page 196

Console Port Cable and Wire Specifications for the SRX1400 Services

Gateway on page 198
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. LEDs are not coherent sources, however. 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, higher-order mode loss (HOL)
results. Together these factors limit the transmission distance of multimode fiber
compared to single-mode fiber.
Single-mode fiber is so small in diameter that rays of light can 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 with multimode fiber, single-mode fiber has higher
bandwidth and can carry signals for longer distances. It is consequently more expensive.
SRX1400 Services Gateway Electrical Wiring Guidelines on page 193
Attenuation and Dispersion in Fiber-Optic Cable for the SRX1400 Services Gateway
on page 195
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