Cisco Catalyst 3750 Hardware Installation Manual page 52

Preparing for Installation
See the Catalyst 3750 release notes for cable requirements for XENPAK module connections. Each
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port must match the wave-length specifications on the other end of the cable, and for reliable
communications, the cable must not exceed the required cable length.
When using shorter distances of single-mode fiber cable, you might need to insert an inline optical
Note
attenuator in the link to avoid overloading the receiver.
When the fiber-optic cable span is less than 25 km, you should insert a 5-decibel (dB) or 10-dB inline
optical attenuator between the fiber-optic cable plant and the receiving port on the 1000BASE-ZX SFP
module at each end of the link.
Note
• Operating environment is within the ranges listed in
Clearance to front and rear panels is such that
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Cabling is away from sources of electrical noise, such as radios, power lines, and fluorescent
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lighting fixtures. Make sure the cabling is safely away from other devices that might damage the
cables.
Airflow around the switch and through the vents is unrestricted.
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Temperature around the unit does not exceed 113°F (45°C).
•
Note
Catalyst 3750 Switch Hardware Installation Guide
2-6
When using shorter distances of single-mode fiber cable, you may need to insert an inline optical
attenuator in the link, to avoid overloading the receiver.
When the fiber-optic cable span is less than 25 km, you should insert a 5-decibel (dB) or 10-dB
inline optical attenuator between the fiber optic cable plant and the receiving port on the
1000BASE-ZX SFP module at each end of the link.
Front-panel indicators can be easily read.
Access to ports is sufficient for unrestricted cabling.
Make sure that there is access to the rear of the rack if you are planning to stack the switches.
If you do not have access to the rear panel, make sure you cable the switches before you
rack-mount them.
AC power cord can reach from the AC power outlet to the connector on the switch rear panel.
If the switch is installed in a closed or multirack assembly, the temperature around it might be
greater than normal room temperature.
Chapter 2
Appendix A, "Technical Specifications."
Switch Installation
OL-6336-06