3com 3C39024 Manuale Utente

C

HAPTER

 6: T

ROUBLESHOOTING

 

THE

 S

YSTEM

Fiber optic transceivers are sensitive optical devices. 
Handle them carefully. If dirt collects on a fiber optic 
lens, the associated LED may not light. You may also 
notice degradation in port performance, indicated by 
an increase in the Link Error Rate (LER) count on a 
port.

To prevent dust from collecting on the fiber optic lens, 
keep the dust covers on the ports at all times when 
they are not in use. 

To clean a fiber optic lens, take these steps:

Remove any accumulated dust or debris from the port 
or connector by blowing across all surfaces with a 
canned air duster.

Compressed gas is recommended, such as 
Chemtronics’ Ultrajet or the Triangle Tool Group’s 
Liqui-Tool Dust-A-Way. Do not use commercial 
compressed air or “house air” because of the risk of 
oil contamination.

Reconnect the cable to the port to check whether 
dusting has corrected the problem. 

Gently wipe the ports with a lint-free, nonabrasive, 
nonadhesive swab. Microswabs by Texwipe are 
recommended.

Gently wipe the connectors with a lint-free, 
nonabrasive wipe or pad. Texwipe pads are 
recommended.