Specifications

Hardware Reference 7
C613-03080-00 REV G
Implementing PoE
The IEEE 802.3af standard, which is the IEEE standard for PoE, describes two
methods for implementing PoE over twisted pair cabling. One method uses the
same strands that carry the network traffic and the other the spare strands.
The PoE implementation on the AT-8624PoE switch transmits power over the
same strands that carry the network traffic (strands 1, 2, 3 and 6). The power
transfer does not interfere with the network traffic. The power and the network
traffic can coexist on the same strands simultaneously.
Powered devices that comply with the IEEE 802.3af standard support both
methods of power delivery. As long as a powered device is compliant with the
standard, it should be able to receive its power from the switch.
LEDs
The following tables outline how the switch and expansion modules report
faults and operational activities. Expansion modules are optional and can be
purchased separately. Contact an authorised Allied Telesis distributor or
reseller, or visit www.alliedtelesis.com for more information on expansion
modules.
System LEDs
Use the Mode Select button to toggle the Mode LEDs to the desired state.
Toggling the Mode Selection button does not affect the normal switch
operations.
LED State Description
FAULT Off Switch operation is normal.
Red The switch or management software is malfunctioning.
1 flash A switch fan has failed.
3 flashes The main PSU has failed and the RPS is now providing
power.
4 flashes The RPS Monitor is set to ON, and the RPS is not
functioning, either because it has failed or has been
switched off.
5 flashes The RPS Monitor is set to ON, but the RPS is not
connected.
7 flashes For the AT-8624T/2M and AT-8624PoE switches: An
expansion module has been inserted or removed while
the switch is powered on.
MASTER Off This LED is not supported.
RPS Green An optional redundant power supply is connected to the
switch.
OFF There is no optional redundant power supply connected
to the switch.
PWR Green The switch is receiving power and the voltage is within
the acceptable range.
Off The switch is not receiving power.