Allied Telesis AT-x930-28GPX, Installation Manual

Page: 38 / 214

Chapter 1: Overview
38
SFP Ports
The twenty four ports on the AT-x930-28GSTX Switch support the
following types of SFP transceivers:

100Base-FX, 1000Base-T, and 1000Base-SX/LX SFP
transceivers

Single-port BiDi 100Base-FX and 1000Base-LX SFP transceivers

1000Base-ZX SFP transceivers
The SFP ports are paired with the twenty four 10/100/1000Base-T copper
ports. SFP port 1 is paired with copper port 1R, port 2 with copper port 2R,
and so on. Only one port in a pair can be active at a time. For example, if
you install a transceiver in SFP port 3 and connect it to an active network
device, the switch deactivates copper port 3R.
Please review the following guidelines for using the SFP ports on the AT-
x930-28GSTX Switch:

Each SFP port is paired with a copper port.

You may not change the port pairings.

Only one port in a pair can be active at a time.

The copper port is the default active port of a pair.

An SFP port automatically becomes active when you install and
connect an SFP transceiver to an active network device.

The switch automatically reactivates the copper port of a pair when
the transceiver in the corresponding SFP port loses its link to a
remote network device. For example, the switch reactivates copper
port 4R if you disconnect the fiber optic cable from a transceiver in
SFP port 4.

The letter “R” in the numbering of the copper ports on the front of
the switch refers to the “redundant” function of the ports. The
copper ports are only available when their corresponding SFP
ports are empty or the SFP transceivers have not established links
with network devices.