Cisco GS7000 - Page 74

Chapter 2 Theory of Operation
54
Switch Operation
The following table describes the optical switch function.
Primary Input
Secondary Input
Alarms
Optical Switch
Path A Optical Power >
ThresholdA (default)
Path B Optical Power >
Threshold B [1]
None
Switch to Path A
Path A Optical Power <
ThresholdA (default)
Path B Optical Power >
Threshold B [1]
Loss of Input
Light at Path A
Switch to Path B
Optical Power
Path B Optical Power >
Threshold B [1]
Path B Optical Power <
Threshold B [1]
Loss of Input
Light at Path B
Switch to Path A
Path A Optical Power <
ThresholdA (default)
Path B Optical Power <
Threshold B [1]
Both Dark
Switch to Path A
Optical Power
Path B Optical Power >
ThresholdB (User Setting)
Path A Optical Power >
ThresholdA [1]
None
Switch to Path B
Path B Optical Power <
ThresholdB (User Setting)
Path A Optical Power >
ThresholdA [1]
Loss of Input
Light at Path B
Switch to Path A
Optical Power
Path B Optical Power >
ThresholdB (User Setting)
Path A Optical Power <
ThresholdA [1]
Loss of Input
Light at Path A
Switch to Path B
Path B Optical Power <
ThresholdB (User Setting)
Path A Optical Power <
ThresholdA [1]
Both Dark
Switch to Path B
Optical Power
[1] Hysteresis Amplitude (default 1.0 dB) is the value above which the input optical
power must rise for the switch to begin sequence to return to the primary switch
position. Hysteresis Amplitude is a user configurable parameter.
Configurable Parameters
The following table defines the configurable parameters for the optical switch.
Parameter
Function
Default
Value
Values
Min
Max
Step
Unit
Mode
Automatic or manual
mode
Auto(0)
Auto(0)
Manual(1)
Threshold B
Switching threshold,
input optical power
at input B
5.0
-10.0
14.0
0.1
dBm