Specifications

Hardware Reference 45
C613-03058-00 REV A
1. Hot swapping is supported by Software Release 2.3.1 or later. AT-AR021 (S) BRI-S/T, AT-AR021 (U) BRI-U, AT-AR022 ETH, AT-AR023 SYN,
and AT-AR026 4ETH PICs can be hot swapped.
The AT-AR740 router automatically monitors its own power supply and fan,
and has the option of a redundant power supply. If a redundant power supply
(RPS) is attached, the AT-AR740 software can detect the presence of the RPS
and the state of its output voltages and fan. RPS monitoring, turned off by
default, can be turned on or off using the command:
SET SYSTEM RPSMONITOR={ON|OFF}
The SHOW SYSTEM command displays the state of the main power supply
and fan, and whether or not the RPS is being monitored. If RPS monitoring is
enabled, it also shows whether an RPS is connected, and the state of its output
voltage and fan.
When a fault occurs in the main power supply or fan, system LEDs on the
AT-AR740’s front and back panels are flashed in a pattern that identifies the
fault (Table 20 on page 44). If RPS monitoring is enabled, the system LEDs also
flash to indicate failures in the RPS connection, power supply or fan. Multiple
faults are indicated by cycling through each error code.
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 Lit when the router or management software is malfunctioning. Flashes to indicate fan,
PSU, and RPS faults.
1 Flash: A router fan has failed.
2 Flashes: If an RPS is connected and RPS monitoring is enabled, an RPS fan has failed.
3 Flashes: If an RPS is connected, the router’s PSU (Power Supply Unit) has failed.
4 Flashes: If RPS monitoring is enabled, the RPS PSU has failed.
5 Flashes: If RPS monitoring is enabled, an RPS is not connected or is not operational
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 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.
NSM
These LEDs give indications about an NSM installed in the router.
Swap Lit when the NSM and its PICs are powered down and can be hot swapped. Only lights
if the Hot Swap button has been pressed and the software release supports hot
swapping
1.
In Use Lit when an NSM is correctly installed. If the software release supports hot swapping,
it indicates that the NSM and its PICs are powered up and may not be swapped.
Table 20: Functions of AT-AR740 router LEDs. (Continued)
LED Function