EXFO FTB-8500 Series for FTB-500 - Manual (Page 459)

Ethernet and Fibre Channel Application 445
25 Troubleshooting
Solving Common Problems
Before calling EXFO’s technical support, please read the following
common problems that can occur and their respective solution.
Problem Possible Cause Solution
Optical Laser LED is off and
the connector is not
generating the signal.

The Laser On option is
disabled.

Ensure that the Laser
button is enabled (On).

There is a configuration
mismatch between the
inserted SFP/XFP and
the rate selected for the
test case (LAN or WAN).

Ensure that the SFP/XFP
is supporting the rate
used for the test case
(LAN or WAN).

The SFP/XFP is not
compatible with the
FTB-8500 Series and
FTB-8120NGE/8130NGE.

Ensure to use a
compatible SFP/XFP.
Refer to Physical
Interfaces and LEDs on
page 11.