Gigabit Interface Converter Installation Note 3
Safety Recommendations
When shorter distances of single mode fiber are used, it may be necessary to insert an in-line optical
attenuator in the link, to avoid overloading the receiver:
•
A 10 dB in-line optical attenuator should be inserted between the fiber optic cable plant and the
receiving port on the WS-G5487 GBIC at each end of the link whenever the fiber optic cable span
is less than 25 km.
•
A 5 dB in-line optical attenuator should be inserted between the fiber optic cable plant and the
receiving port on the WS-G5487 GBIC at each end of the link whenever the fiber optic cable span
is equal to or greater than 25 km, and less than 50 km.
Note
The maximum number of installed 1000BASE-ZX GBICs is limited in each Catalyst chassis.
These limits are necessary in order to fall within the emission specifications for these products.
Table 2 is a list of the GBIC limits for the different Catalyst systems.
Safety Recommendations
This section describes the warning symbol used in this document and GBIC handling
recommendations.
Warning
This warning symbol means danger. You are in a situation that could cause bodily injury. Before
you work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar with
standard practices for preventing accidents. To see translations of the warnings that appear in this publication,
refer to the appendix “Translated Safety Warnings” in the Catalyst 4000 or 5000 Series Installation Guide.
Table 2
Maximum Number of GBICs Per Platform
Platform
Maximum number of GBICs
Catalyst 4000
12 to comply with EN55022 Class B
and FCC Class A.
Catalyst 5000
12 to comply with FCC Class A.
Catalyst 6000
12 to comply with EN55022 Class B.
24 to comply with FCC Class A.
