Cisco 7201 Quick Start Manual page 16
Cisco 7201: quick start
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Also See for 7201:
- Regulatory compliance and safety information manual (76 pages) ,
- Installation and configuration manual (166 pages) ,
- Datasheet (10 pages)
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We strongly recommend cleaning optical fiber connections before attaching cables to equipment.
Note
cleaning fiber-optic cable connectors and receptacles, see the
Inspection and Cleaning Procedures for Fiber-Optic Connections
http://www.cisco.com/en/US/tech/tk482/tk876/technologies_white_paper09186a0080254eba.shtml. I
illustrations and photos of procedures and equipment required to properly clean fiber-optic connections.
Also see the Compressed Air Cleaning Issues for Fiber-Optic Connections document at
http://www.cisco.com/en/US/tech/tk482/tk611/technologies_white_paper09186a00801b08da.shtml.
Warning
Class 1 laser product. Statement 1008
Warning
Class 1 LED product. Statement 1027
Remove the plug from the SFP module so that you can insert the optical fiber cables. Keep the plug for use should you
Step 1
ever disconnect the optical fiber cables.
Warning
Invisible laser radiation may be emitted from disconnected fibers or connectors. Do not stare into beams or view
directly with optical instruments. Statement 1051
Step 2
Attach the appropriate optical fiber cable directly to the SFP module. You can use either simplex or duplex connectors
for most devices.
• 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.
If you plan to use a SFP-GE-L at distances greater than 984.25 feet (300 meters) over 50/125-micron or
Caution
62.5/125-micron multimode fiber, you must use the mode-conditioning patch cord to prevent data transmission
problems.
Mode-Conditioning Patch Cord Description
A mode-conditioning patch cord can be used with the SFP-GE-L= (SFP module) to allow reliable laser transmission between the
single-mode laser source on the SFP module 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.
This degradation results in a decrease in the link span (the distance between a transmitter and a receiver) that can be supported
reliably. The effect of DMD can be overcome by conditioning the launch characteristics of a laser source. A practical means of
performing this conditioning is to use a device called a mode-conditioning patch cord.
A mode-conditioning patch cord is an optical fiber cable assembly that consists of a pair of optical fibers terminated with
connector hardware. Specifically, the mode-conditioning patch cord is composed of a single-mode optical fiber permanently
coupled off-center (see Offset in
mode-conditioning patch cord assembly.
16
(Figure 13
shows an SFP module with a duplex connector being installed in SFP port 0/1.)
Figure
14) to a graded-index multimode optical fiber.
document at
Figure 14
shows a diagram of the
For information about
t provides detailed
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