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Table 41: Cable Specifications for Console and Management Connections for the PTX10004
Routers (continued)
Port on
PTX10004
Router
Cable Specification
Management port
Category 5 cable or
equivalent suitable for
1000BASE-T operation
SEE ALSO
PTX10004 Console and Management Cable Specifications and Pinouts | 110
Connect a PTX10004 Router to a Network for Out-of-Band Management | 152
Connect a PTX10004 Router to a Management Console | 153
PTX10004 Fiber-Optic Cable Signal Loss, Attenuation, and Dispersion
IN THIS SECTION
Signal Loss in Multimode and Single-Mode Fiber-Optic Cables | 106
Attenuation and Dispersion in Fiber-Optic Cables | 107
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. The PTX10004 router uses
various types of network cables, including multimode and single-mode fiber-optic cables.
Signal Loss in Multimode and Single-Mode Fiber-Optic Cables
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 reflect
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
Cable Supplied
One 7-foot (2.13-meter) long
RJ-45 patch cable
Maximum
Device
Length
Receptacle
100 meters
RJ-45
106
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