Allied Telesis AR Router Series, Hardware Reference Manual

Page: 39 / 111

Hardware Reference 39
C613-03031-01 REV E
Figure 16: Front and rear panels of the AR720 Series router.
Table 18: Functions of LEDs of the AT-AR720 router.
LED Function
Front panel Rear panel
ETH
These LEDs give indications about the Ethernet interfaces.
Col Lit when a collision is detected on the Ethernet interface.
Lnk Lit when the Ethernet interface is connected to a device (e.g., a hub),
which is generating link pulses.
Tx Lit when data is being transmitted over the Ethernet interface.
Rx Lit when data is being received on the Ethernet interface.
FD Lit when the Ethernet interface is in full duplex mode.
100 Lit when the Ethernet interface is in 100 Mbps mode.
BASE
These LEDs indicate the state of the main router unit.
Power PWR Lit when power is supplied and the router is switched on.
Run 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.
System SYS 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.
Security SEC Lit when a user is logged in with SECURITY OFFICER privilege and the
router is in SECURITY MODE.
ENGINE
These LEDs give indications about a MAC (Mini Accelerator Card), which
can be installed for encryption and/or compression purposes.
ACT Lit when a MAC card is installed in the MAC slot.
DAT Lit when data is transferred to or from the MAC card.
ERR Lit when there is an error in the data transmission to or from the MAC
card.
Clear CLR Lit when a secure router has enabled PPP interfaces or Frame Relay
circuits that are configured to send clear text.
AR720
Front Panel
Rear
LEDs
Asynchronous ports Power switch Fuse Power inlet
AR720FRP
Two PIC bays
DISCONNECT MAINS SUPPLY BEFORE
REMOVING
LEDs Ethernet Port
POWE
STATU
BAS BAY 1 BAY 0
ENGIN
ETHERNE PORT INTERFACE
PW RUN SY F LNK R SE
ACT DAT ER CLR 100 COL
0 1 0
T
ACT
B
PRI
E1/T1
N
STATU
Multi-Functional Remote Router
SECURIT POWE RUN SYSTE CLEA
Model name
SYN
Tx
Rx