Allied Telesis AR Series Hardware Reference Manual page 24

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Figure 8: Front and rear panels of the AT-AR390 and AT-AR395 routers.
Front Panel Model name
AR390
Access Router
Rear Panel
AR390
PORT 1 (RS232)
CONFIG
1 2 3 4
PORT 0 (RS232)
DIP Asynchronous
switch ports
Table 8: Functions of the front panel LEDs on the AT-AR370(U) router .
LED Function
LAN Link Lit when the Ethernet interface is connected to a device (e.g., a hub),
which is generating link pulses. This LED is normally lit.
LAN Txd Lit when data is being transmitted over the Ethernet interface.
LAN Coll (yellow) Lit when a collision is detected on the Ethernet interface.
LAN Rxd Lit when data is being received on the Ethernet interface.
WAN Syn Lit when data is being transmitted or received over the synchronous
interface.
WAN ISDN Lit when data is being transmitted or received over the ISDN interface.
WAN Active Lit when the U interface is in the Activated state (i.e., it is fully
operational at layer 1).
System (red) This LED is not normally lit. It is used to signal various system conditions
(e.g., when the processor executes the reboot sequence). Generally it
signals a possible fault condition, but it will light briefly during power-
up and operator initiated reboot.
Run Lit when the internal processor is executing code. If the processor stops
for any reason (a fault condition), then the LED will not be lit.
Power Lit when power is supplied and the router is switched on.
ETHERNET 0
MDX
120Ω
HUB PC
Ethernet port G.703/PRI ISDN port
10BASE-T
PRI 0
75Ω Tx 75Ω Rx
120Ω
AR Router
WAN
LEDs
100–240 VAC, 50–60Hz, 300mA.
DISCONNECT MAINS SUPPLY BEFORE REMOVING LID
NO USER SERVICEABLE PARTS
Power inlet
AR390FRP
C613-03031-01 REV C