Allied Telesis AR Series Hardware Reference Manual page 39

Hardware Reference
Figure 16: Front and rear panels of the AR720 Series router.
Front Panel
STATU
POWE RUN SYSTE CLEA
LEDs
Rear
DISCONNECT MAINS SUPPLY BEFORE
REMOVING
POWE
Power switch Fuse Power inlet
Table 18: Functions of LEDs of the AT-AR720 router.
LED
Front panel Rear panel
ETH
Col
Lnk
Tx
Rx
FD
100
BASE
Power PWR
Run RUN
System SYS
Security SEC
ENGINE
ACT
DAT
ERR
Clear CLR
C613-03031-01 REV E
SECURIT
STATU ETHERNE
ENGIN
ACT DAT ER CLR 100 COL T
PW RUN SY SE F LNK R
0
BAS
LEDs Ethernet Port
Function
These LEDs give indications about the Ethernet interfaces.
Lit when a collision is detected on the Ethernet interface.
Lit when the Ethernet interface is connected to a device (e.g., a hub),
which is generating link pulses.
Lit when data is being transmitted over the Ethernet interface.
Lit when data is being received on the Ethernet interface.
Lit when the Ethernet interface is in full duplex mode.
Lit when the Ethernet interface is in 100 Mbps mode.
These LEDs indicate the state of the main router unit.
Lit when power is supplied and the router is switched on.
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.
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 is lit during a power-up or
operator initiated reboot, and remains lit until a release has been loaded
from flash memory.
Lit when a user is logged in with SECURITY OFFICER privilege and the
router is in SECURITY MODE.
These LEDs give indications about a MAC (Mini Accelerator Card), which
can be installed for encryption and/or compression purposes.
Lit when a MAC card is installed in the MAC slot.
Lit when data is transferred to or from the MAC card.
Lit when there is an error in the data transmission to or from the MAC
card.
Lit when a secure router has enabled PPP interfaces or Frame Relay
circuits that are configured to send clear text.
PORT
SYN
Tx
Rx
1 0
BAY 1
Asynchronous ports
Model name
AR720
Multi-Functional Remote Router
Two PIC bays
INTERFACE
ACT
B N
BAY 0
39
AR720FRP