Allied Telesis AT-MCF2000, Installation Manual

Page: 44 / 190

Chapter 3: AT-MCF2012LC, AT-MCF2012LC/1 and AT-MCF2032SP Modules
44 Section I: Features
Link Test Mode
When a channel is set to the Link Test mode, the Link LEDs report the
current states of the connections between the ports and the local and
remote network devices. The Link LED of a port 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.
Refer to Table 8 for the descriptions of the states of the Link LEDs for the
twisted pair port and the fiber optic port in a channel set to the Link Test
mode.
MissingLink Mode
The ports in a channel set to this mode operate in tandem. A channel port
is not allowed to establish a link with its local or remote network device
unless its companion port in the channel can also establish a link with its
network device. As a result, the Link LEDs of the ports also work in
tandem. As described in Table 9, the Link LEDs will be on if both ports can
establish links to their network devices, and they will if off if one or both
ports cannot establish links. For more information on this operating mode,
refer to “MissingLink Mode” on page 37.
Table 8. Link LEDs in the Link Test Mode
Channel Ports
Link LED
States
Description
Twisted Pair
Port Off Neither port in the channel has
established a link to a network
device.
Fiber Optic Port Off
Twisted Pair
Port Steady Green or
Amber Both ports in the channel have
established links to their network
devices.
Fiber Optic Port Steady Green
Twisted Pair
Port Steady Green or
Amber 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 in the channel
has established a link to a network
device, but the twisted pair port
has not established a link.
Fiber Optic Port Steady Green