Num
ber
Indicato
r/Button
Color Description
3 RUN/AL
M
Red and
green
l When no USB flash drive is connected to the router,
the RUN/ALM indicator works as the system
indicator:
– Slow blinking green: The system is running
properly.
– Fast blinking green: The system is loading or
upgrading the software.
– Steady red: A fault or alarm that affects services
has occurred and must be handled immediately.
– Off: The system software is not running or is
resetting.
l When a USB flash drive is connected to the router,
the RUN/ALM indicator works as the USB
indicator:
– After the USB flash drive starts, the RUN/ALM
indicator fast blinks for 3 seconds, indicating that
it enters the USB indicator mode.
– In USB indicator mode:
– Steady green: The system has been upgraded
using the USB flash drive.
– Fast blinking: The system is being upgraded
using the USB flash drive.
– Steady red: The system failed to be upgraded
using the USB flash drive.
– After the USB flash drive is removed, the
RUN/ALM indicator slow blinks for 3 seconds,
indicating that it enters the system indicator
mode.
4
RS485-0 Green
l Steady on: The RS485-0 link is available, but the
interface is not connected or is not transmitting or
receiving data.
l Fast blinking: The RS485-0 link is available and is
transmitting and receiving data.
l Off: The RS485-0 link is not configured or has
failed.
5 RS485-1 Green
l Steady on: The RS485-1 link is available, but the
interface is not connected or is not transmitting or
receiving data.
l Fast blinking: The RS485-1 link is available and is
transmitting and receiving data.
l Off: The RS485-1 link is not configured or has
failed.
Huawei
AR500&AR510&AR531&AR550&1500&AR2500
Industrial Switch Routers
Hardware Description
3 Chassis
Issue 10 (2019-03-06) Copyright © Huawei Technologies Co., Ltd. 455
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