DKT A/S
Fanoevej 6
DK-4060 Kirke Saaby
Tlf
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Network Managed Optical Amplifier
User’s Manual Rev 1.3
OFA-CCS/CCD Series
June 2014
10
Condition
Color
Performance
Laser
Green
Pump Lasers On
Red
Pump Lasers Off
Status
Green
Normal Operation (No Alarm)
Red
LOS Alarm / LOP Alarm
Yellow
Bias / Temp / Case Temp/ Power / FAN Alarm
Comm
Blue
Ethernet Link On
Optical Connection Port on the front panel
Table 5. Optical Connection Port
Port
Performance
Input
Optical Input Port for Launching Input Signal
Out1~4
Optical Output Port for Amplified Signal
Communication Port on the front panel
Table 6. Communication Terminal Port
Port
Performance
Ethernet
Ethernet Communication Port for SNMP Monitor and Control
RS-232C
Serial Communication Port for RS-232C Monitor and Control
3.2.2
LED State Information
LOS (Loss of Signal) Alarm
When the input optical signal power to the EDFA is lower than the minimum input
conditions, the color of status LED changes green to red (see the TEST REPORT). The
threshold for triggering the loss of input signal alarm is set below the minimum optical
input level.
If the LOS alarm is activated the EDFA automatically changes to the Laser Shutdown
state, the output power is turned off.
In response to a loss of input signal, the bias current of the pump laser diode goes into a
shutdown state to prevent the development of dangerous laser diode operation conditions.
If laser shutdown does not occur, the pump laser diode can be damaged.
This condition is automatically reset when the input power is restored to a power above
the alarm threshold for the EDFA. The EDFA returns to its normal state, the color of
status LED changes red to green, and the Laser ON state condition returns.
LOP(Loss of Output Power) Alarm
When the optical output power of the EDFA is lower than the reference power, the color
of status LED changes green to red (see the TEST REPORT). This level is commonly
3dB below the reference output power.
If the Laser OFF state is selected from the LCD menu, the color of status LED changes
