Hardware Reference
23
C613-03031-01 REV E
Figure 7: Front and rear panels of the AT-AR370(U) router.
Table 7: Functions of the front panel LEDs on the AT-AR370(S) 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 BRI has successfully completed the exchange of INFO 1 and
INFO 2 signals, and INFO 3 and INFO 4 signals are present on the link.
This means that the ISDN interface is correctly connected to a working
NT device.
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.
Rear Panel
370UFRP
SYNCHRONOUS 0
CONFIG
Asynchronous
ports
DIP
switch
4
3
2
1
Ethernet port
Synchronous port
AR370
Front Panel
PORT 1 (RS232)
PORT 0 (RS232)
ETHERNET 0
HUB
PC
MDX
AR370
ISDN-U BRI 0
BRI-U ISDN Port
Access Router
COLLISION
10BASE-T
WAN
LINK
TRANSMIT
RECEIVE
SYN
ISDN ACTIVE
SYSTEM
RUN
POWER
Model name
LEDs
100–240 VAC, 50–60Hz, 300mA.
DISCONNECT MAINS SUPPLY BEFORE REMOVING LID
NO USER SERVICEABLE PARTS
Power inlet
