Allied Telesis AT-PC2002/POE - Manual (Page 29)

AT-PC2002/POE Media Converter Installation Guide
29
Link LEDs and the Operating Modes
The basic function of the Link LEDs is to report the states of the links of the
ports. However, the meanings of the LEDs vary slightly depending on the
operating mode of the unit. The following sections describe the states and
meanings of the LEDs under the different operating modes.
Link Test Mode When a media converter is set to the Link Test mode, the Link LEDs for
the two ports report the current states of the connections between the
ports and the local and remote network devices. As described in Table 7, a
Link LED will be on when a port has a link to its network device and it will
be off when a port does not have a link.
MissingLink
Mode
When the media converter is set to the MissingLink mode, the two ports
pass their “Link” status to each other so that a change in the link status on
one port is replicated on the other port. A port is not allowed to establish a
link to its network device unless the other port can also establish a link with
its device. For more information on this operating mode, refer to
“MissingLink Mode” on page 21.
The Link LEDs of the two ports in this mode always work in tandem. They
are either both on or off. Table 8 lists the combinations and definitions of
the Link LEDs for the twisted pair port and fiber optic port operating in this
mode.
Table 7. Link LEDs in the Link Test Mode
Ports
Link LED
States
Description
Twisted Pair
Port Off Neither of the ports has
established a link to a network
device.
Fiber Optic Port Off
Twisted Pair
Port Steady Green Both of the ports have established
links to their network devices.
Fiber Optic Port Steady Green
Twisted Pair
Port Steady Green The twisted pair port has
established a link to its network
device, but the fiber optic port has
not established a link.
Fiber Optic Port Off
Twisted Pair
Port Off The fiber optic port has established
a link to a network device, but the
twisted pair port has not
established a link.
Fiber Optic Port Steady Green