Perle Systems PERLE P850 - Manual (Page 20)

Installation
14
Identify the Status LEDs
The meanings of the four 3-colour Light Emitting Diodes (LEDs) on
the front of the P850 router are found in the following chart:
Green Router is running and has passed power-up diagnostics
Green (flashing) Router is in BOOT mode and is programming the flash
Red Router is powered up but has failed power-up diagnostics
Yellow Router is decompressing the software into the RAM
Yellow (flashing) Router is in BOOT mode
Power
Green LAN is connected and forwarding
Red Router is NOT connected to the LAN
Yellow LAN is connected and NOT forwarding: i.e. Listening,
Learning, or Blocking
LAN
Green LINK is up, idle
Green (flashing) LINK is up transmitting data traffic
Yellow LINK negotiating - control signals asserted on link
Red LINK is down (no control signals present)
Tx
Green LINK is up, idle
Green (flashing) LINK is up receiving data traffic
Yellow LINK negotiating - control signals received from link
Red LINK is down (no control signals present)
Rx