Extreme Networks Alpine 3802, Руководство по установке оборудования, Страница: 371 / 394

Installing GBICs
Extreme Networks Consolidated "i" and "e" Series Hardware Installation Guide 371
Safety Information
Before you install or replace a GBIC, read the safety information in this section.
CAUTION
GBICs can emit invisible laser radiation. Avoid direct eye exposure to the beam when fiber optic
connections are unplugged.
NOTE
Compliance Information: Compliant with EN60825-1+A2:2001 for European Union; Compliant with FCC
21 CFR Chapter 1, Subpart; Class 1 Laser Product; Refer to switch or I/O module specific
documentation for further compliance information when this optic device is installed within a system.
CAUTION
Use only Extreme-approved optic devices within Extreme switches. Optical modules provided by
Extreme Networks are compliant for use with Extreme systems.
Disconnect the fiber-optic or UTP cable from the GBIC before removing the GBIC from the I/O module
or the switch.
Preparing to Install or Replace a GBIC
CAUTION
GBICs can emit invisible laser radiation. Avoid direct eye exposure to the beam.
To ensure proper installation, complete the following tasks before inserting the GBIC:
1 Inspect and clean the fiber tips, coupler, and connectors.
2 Prepare and clean an external attenuator, if needed.
3 Calculate the link budget.
In addition to these tasks, Extreme Networks recommends the following when installing or replacing
GBICs on an active network:
• Use the same type of GBIC at each end of the link.
• Connect one end of the link to the Tx port. Without an attenuator, measure the total loss from the Tx
port to the other site of the link. The total loss must not exceed the total optical system budget listed
in Figure 14 on page 54.
• Use dispersion shifted fiber whenever possible. This provides superior performance in the 1550 nm
range.
• When you handle fiber optic cable, do not stretch the fiber.
• Make sure the bend radius of the fiber is not less than 2 inches.