Manage VOA and APC

Perform the following steps to manage VOA (Variable Optical Attenuator) and APC (Automatic Power Control) in Topology View page. This procedure explains to enable APC on individual channels in ROADM/VOA.

NOTE: VOA is not supported for this release.

Click Configuration > Layer 1 > Circuits menu and click on Manage Circuits. The Manage Circuits page is displayed.
Select the desired circuit where ROADM/VOA is present and click Graphical View. The graphical view of the circuit is displayed at the bottom of Manage Circuits page.
To view the graphical view of circuits in Topology View page, the Topology View page must be launched in a separate browser tab else error message is displayed.
Click (Show Graphical View In Topology) icon in the Graphical View window. A message to open topology view is displayed.
Click OK and open the Topology window launched. The desired circuit will be shown highlighted (in pink) in the Topology View page.
Right click on the highlighted circuit and click on Manage APC and VOA as shown in the figure.
The window Edit VOA APC Details is displayed. Edit the parameters by referring to table Edit VOA APC details.
Click on Refresh button to update the current values and click on OK.

Edit VOA APC details

Attribute	Description
Attenuation	Set the attenuation value in the range 0 to 15.
Required Power	Enter the channel power to be achieved after attenuation adjustment. The acceptable value is -15 to +15.
Current Power	Displays the present channel power.
Lock Power Range	Maximum tolerated power deviation before triggering APC. The acceptable value is -1 to +1.
Regulation Power Range	Range of Channel power deviation where power is adjusted. The acceptable value is -4 to +4.
Deviation Tolerance	Control loop continues to adjust the channel power level till the Tolerance range from -1 to +1.
Channel APC	Enable or disable the APC on the desired channel.
Attenuation Control	Select the device/card on which APC is required. The acceptable values are 'ROADM' or 'VOA'. NOTE: VOA option is not supported for this release.
Channel Status	Displays the current status of the channel.