Installation guide

AT-8000 Series Fast Ethernet Switches 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

switch. For example, you cannot connect a fiber optic port with a

maximum distance of 40 kilometers and an operating wavelength

of 1550 nanometers (nm) to a remote fiber optic port with an

maximum distance of only 2 kilometers and a wavelength of 1310

nm.

# Check to be sure that the fiber optic ports on the switch and on

the end node are operating at the same speed and duplex mode.

# AT-8024GB switch only — Verify that the GBIC module is

completely inserted into the GBIC expansion slot on the front of

the switch.

Note

A 1000Base connection can take from five to ten seconds for the

link to be established.

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:

# Reset the switch using the Reset button on the back panel of the

switch.

# If the FAULT LED remains ON after you have reset the switch,

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.