33
Table 1.21 the Instruction of Indicator Lamps of EM4700BD-4XG-XFP
LED
Indicator
Panel
Sign
State Explanation
On
（
green
）
The boardcard is power-on
Power
Indicator
Lamp
PWR
Off
The boardcard is power-off
On
（
green,
glittering at the
frequency of 1 HZ
）
The boardcard is operating normally
On
（
green,
glittering at the
frequency of 8 HZ
）
The system is booting
（
Booting after the
boardcard is hot-plugged in
）
Run
Operating
normally
RUN
Off
The boardcard is operating abnormally
XFP Interface Indicator Lamps
On
（
green
）
The network connection of XFP Transceiver
is normal.
State
Indicator
Lamp
Link
Off
There is no network connection on XFP
Transceiver
Transmissio
n Indicator
Lamp
Act
On
（
green
）
Receiving or sending data.
1.4.2.12.3 Front Panel Interfaces Description
EM4700BD-4XG-XFP provides 4 10,000 Mbps XFP electric interfaces.
EM4700BD-4XG-XFP supports XFP transceivers of the following types:
z
ET5302-LR XFP 10G Transceiver 10KM
z
ET5302-ER XFP 10G Transceiver 40km
1.4.3 Power supply
1.4.3.1 EM4704BD-AC
ES4704BD uses 1 +1 redundant power supplies. Each of them may serve as a
standby power supply for another. Under normal operation conditions, the two power
supply modules concurrently operate and each of them bears half of the loads. If one of
the power supply modules fails to work or its switch is off, its alarming indicator will be on.