Allied Telesis AT-8350GB Installation Manual page 85

acceptable limits. For specifications on the transceiver in the GBIC
module, refer to the GBIC Installation Guide.
Check that the operating specifications (for instance, wavelength
and maximum operating distance) of the fiber optic port on the
remote end node are compatible with the fiber optic port on the
GBIC module. For example, you cannot connect a GBIC module
with a maximum distance of 40 kilometers and a wavelength of
1550 nanometers (nm) to a remote fiber optic port with an
maximum distance of only 10 kilometers and a wavelength of
1310 nm.
Make sure you have configured the port in the management
software as a GBIC port and not as a twisted pair port. For
instructions on how to change this setting, refer to the AT-S41
Management Software User's Guide. When you change the
port setting in the management software to GBIC, the GBIC S
(Selection) LED to the right of the GBIC slot will turn amber.
Verify that the remote fiber optic port is operating at 1000 Mbps
and in full-duplex mode. The 1000 Mbps operating speed of a
GBIC module is fixed and cannot be changed.
If the FAULT LED is blinking, no action is required. A blinking FAULT LED
could indicate that a new version of the management software is being
downloaded to the switch or that the switch's configuration is being
changed, such as with the creation of a new VLAN. The LED will stop
blinking once the switch has completed the download or its
reconfiguration.
If the FAULT LED is constantly ON, a problem has occurred in the switch.
Do the following:
Power OFF the switch by disconnecting the power cord, wait a
few moments, and then reconnect the power cord.
If the FAULT LED remains ON, try downloading a new version of
the switch's management software through the RS-232 Terminal
Port on the front panel of the switch. For instructions, refer to the
switch's software management guide.
Note
If the FAULT LED remains steady ON, contact Allied Telesyn
Technical Support for assistance.
AT-8350GB Installation Guide
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