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Table 2 P112T Stackable Switch front panel LED indicators
LED Indicator Status Meaning
PWR Power OFF
ON
Blink
Mains power not connected
Mains power connected
Working on back-up power supply
NMA Agent OFF
ON
No agent in switch
Switch contains an active agent
RED NMA Reserved for future use.
Port LEDs
1 to 24 Each LED can display Link, Collision, Full Duplex, Transmit,
and Receive states, depending on what has been selected
using the Select buttons.
Function LEDs
LINK Link Status OFF
ON
Blink once
Blink twice
Port Disabled
Port is enabled and link is OK
Link Test Fail.
Partition.
COL Collision OFF
ON
No Collision
Collision occurred on line
FDX Half/Full
Duplex
OFF
ON
Half duplex – regular 10BASE-T Ethernet is
connected to this port.
10BASE-T Full Duplex device is connected to
this port, which means a throughput of
20 Mbps. In full duplex operation, no
repeaters are allowed in the path.
TX Transmit to line OFF
ON
No activity
Data transmitted
RX Receive from line OFF
ON
No activity
Data Received
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Document number: 130001 Rev. A