Zhone 4821-A2 ユーザーズマニュアル
LEDs
34
BitStorm 4800 Express Model 4821-A2 Installation Guide
4821-A2-ZN21-30
LED Meanings
When power is first applied to the unit, it performs a power-on self-test. When
this test is successfully completed, the Status LED blinks. The meaning of all
the LEDs is shown in
this test is successfully completed, the Status LED blinks. The meaning of all
the LEDs is shown in
Table 3:
Front Panel LEDs
LED
Color
State
Meaning
Link*
* The RJ45-type connectors for Port 1 and Port 2 bear two LEDs: the left one is
the Link LED and the right one is the Activity LED.
Green
Off
On
Flashing
No Ethernet link present.
Ethernet Link present.
Ethernet link is present, but port is
administratively disabled.
Activity*
Green
Off
On
No data is being transferred.
Data is being transferred.
STATUS
Green
Off
On
No power, or the unit has not
completed initialization.
Unit has power and has completed
initialization.
ALARM
Amber Off
On
No Alarms.
Unit failed self-test, or the unit has
exceeded a safe temperature, or a fan
has failed.
TEST
Amber Off
On
Normal operating mode.
At least one port is in test mode.
DSL Ports
(LEDs
numbered
1–24 or 1–48
correspond to
DSL ports
1–24 or 1–48)
Green
Off
On
The port is disabled or no signal is
detected on the line.
Port has successfully trained with the
remote and is active.