Installation guide

Chapter 4 Configuring the Gigabit Ethernet Ports
Installing, Removing, and Maintaining GBICs
4-6
Catalyst 2984G, 2948G-GE-TX, and 2980G Switch Hardware Installation Guide
78-6286-04
• You must insert a 5-dB inline optical attenuator between the single-mode
fiber-optic network and the receiving port on the 1000BASE-ZX GBIC at
each end of the link if the link is greater than 15.5 miles (25 km), but less than
31 miles (50 km).
Installing GBICs
This section describes how to install GBICs.
Caution Unnecessary removal and insertion of a GBIC could lead to premature failure of
the GBIC. A GBIC has a lifetime of 100 to 500 removals and insertions.
A switch can be shipped with or without GBICs installed.
Caution When removing or inserting a GBIC, always wear an ESD wrist strap connected
to the ESD wrist strap connector. For more information about ESD, refer to the
Site Preparation and Safety Guide.
Note GBICs are online swappable.