Overview and getting started

The following articles deal with the rules in more detail. Basic settings are explained. Please use the Comsof manual for the settings in detail. 

Please note that after changes to the rules, it has to be saved and locked.

Opening the optimizer settings

The planning settings are entered via a user-friendly dialog. In the Start panel box of the NET Design tab you will find the buttons


  • for selecting the version of the optimizer
  • for opening the Rule set > Optimizer settings
  • for the advanced settings for defining the assignment of LUs and BUs, for example.

Optimizer settings

Clicking on “Optimizer settings” opens the dialog for defining the planning rules.

When you start a new, the dialog is still empty.


Creating a new rule set


Start creating a new rules by clicking the corresponding button.

Give the rules a unique name and select the currency for the bill of material.

You can start with a new default rules, or you can duplicate an existing rule set and then modify it.


Default Rule set

When you create a new rules, you have the option of selecting from various default settings. 


Standard Rules Planning from the building to the POP
Standard Rules- 2 distribution layers  Planning with two distribution layers up to the POP
Standard Rules- Backbone Layer Planning from the building to the backbone point
Standard Rules- Ring Topology Planning rings
Standard Rules- FTTdp (Twisted pair)  Planning up to the drop point


If you want to have costs populated as an example, select the “Fill in example costs” checkbox.


Duplicate existing rules

If rules are already defined in the planning rules, you can duplicate them and save and edit them under a new name.


Importing a Rules


If you want to use a rules from other projects, you can import it.

The import expects a .rules file.

Menu items

An explanation of the menu items in the header of the rules is given below.


In the work order, you will find all the data necessary for the optimizer for planning. For example, the rules is stored as a .rules file under input → CalculationInput and can be copied from there and imported into another project. There, you will also find calculation licenses that have already been created if they need to be saved in the working folder.  


Under Settings, you can change the language of the rules, for example. Please note that the change will not be visible until you open the rules again. 


This section deals with area/calculation licenses.

If you have already created a calculation license for a project, but want to work in a copy of the project, then you do not need to activate the license again, but can reload this calculation/(area) license from the license server or from the hard drive. For this, it has proven to be a good idea to give the license a unique name the first time it is created, in order to find it better again later on. 


It is recommended to save the area license in the project. To do this, select the default folder for the area licenses > “Set Default Area License Folder”.


General information on rules

In a planning rule, depending on the template selected at different depths, the technology, the materials to be used and costs, the fibers requirement and the capacities of the network distribution points are defined. This information is found for each network layer.

You can find out what the information is and what the entries mean in the following articles.


The icons in the form header have the following functions:


Rename rule



Undo changes (to last saved version)


Save the rules after making changes and close the dialog.


Export material and work data. These data can then be imported into a NET Engineering project. 


Delete rule

Advanced settings


In the advanced Comsof fiber-designer settings, you have the option of making settings for automatic preprocessing. Detailed information can be found in the manual of the fiber designer. Some important settings are explained here.

Activate the “Created paired drop trenches” checkbox and the preprocessing tries to connect adjacent demand points via a drop trench in the form of a “Y”.

The default assignments of demand units for the connection technology—living units, business units, school, hospital, public institutions—can be changed. 

If you activate the “Create BOM copy” checkbox, a bill of material is automatically written to the project folder after each calculation.