AT-FS716L & AT-FS724L Fast Ethernet Switch Installation Guide
13
Hardware Feature Description
The hardware features of the AT-FS716L and AT-FS724L Fast Ethernet
switches are described in the following sections:
“ecoFriendly Power Saving Functions”
“Twisted-Pair Ports” on page 14
“System and Port LEDs” on page 15
“High Efficiency Internal Power Supply” on page 16
ecoFriendly
Power Saving
Functions
The AT-FS716L and AT-FS724L implement the following power saving
features.
Cable Length Power Savings
This feature automatically allows the port to use the minimum amount of
power required to commnicate with its end node based on the cable
length. When an individual port’s link status is UP, the length of the cable
connected to the port is automatically detected and the power needed out
of the port is adjusted accordingly to minimize power consumption. More
power will be used by a port when a longer cable is installed than for a
shorter cable.
Link Down Power Savings
Approximately ten seconds after a port’s link status changes to DOWN,
the port will enter into a link down power savings mode. While in this
mode, the port will monitor the receive pair for detection of incoming
signals such as link pulses and fast link pulses. Once a signal is detected,
the port will “wake up” and establish the proper link while resuming normal
operation.
