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Chapter 2
Rack-Mounting, Tabletop Installation, and Cabling
Figure 2-13 GBIC Port Connections
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Step 1
Remove the plug from the GBIC so that you can insert the cables. Keep the plug for use should you ever
disconnect the optical fiber cables.
Warning
Because invisible laser radiation may be emitted from the aperture of the port when no fiber cable is
connected, avoid exposure to laser radiation and do not stare into open apertures.
Step 2
Attach the appropriate optical fiber cable directly to the SC-type receptacle on the GBIC. You can use
either simplex or duplex connectors for most devices.
port 0.)
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•
A mode-conditioning patch cord can be used with the GBIC-LX/LH or WS-G5486 to allow reliable laser
transmission between the single-mode laser source on the GBIC and a multimode optical fiber cable. See
the
Mode-Conditioning Patch Cord Description
A mode-conditioning patch cord can be used with the GBIC-LX/LH or WS-G5486 to allow reliable laser
transmission between the single-mode laser source on the GBIC and a multimode optical fiber cable.
When an unconditioned laser source designed for operation on single-mode optical fiber is directly
coupled to a multimode optical fiber cable, an effect known as differential mode delay (DMD) might
result in a degradation of the modal bandwidth of the optical fiber cable.
OL-5419-01 B0
To external 1000BASEX network
1 duplex connector (TX and RX)
To external 1000BASEX network
2 simplex connectors
For simplex connectors, two cables are required, one cable for transmit (TX) and a second cable for
receive (RX).
For duplex connectors, only one cable that has both TX and RX connectors is required.
"Attaching the Mode-Conditioning Patch Cord" section on page 2-21
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TX (GE port 0)
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RX (GE port 0)
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GE port 1
(Figure 2-13
Cisco 7401ASR Installation and Configuration Guide
Connecting I/O Cables
7
shows a GBIC installed in GE
for installation instructions.
2-19
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Table of Contents
Troubleshooting
