Incoming Fax Routing Methods: E-mail, Store in Folder, Print, Custom

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Fax Voip FSP implements Fax Voip FSP Routing Extension that is integrated into the Windows Fax Service. When the fax service receives a fax transmission, it routes the received document through each of the fax routing methods defined by a fax routing extension.

You can configure Incoming Routing Methods to route incoming faxes to recipients on the network. Depending on the Caller Number (Caller ID) and Called Number (DID), different actions can be applied to incoming fax. These actions are defined by the so-called rules. The independent set of rules is used for each method.

The fax routing methods defined by the Fax Voip FSP Routing Extension are very similar to the fax routing methods defined by the Microsoft Routing Extension (available on any Windows Server computer, such as Windows Server 2022, Windows Server 2019, Windows Server 2016, Windows Server 2012R2 etc.). The essential difference is the possibility to do routing based on Called Number (DID) and without being tied to a specific fax device. Please note, that Fax Voip FSP stores the Called Number (DID) in the Routing Information field, which is available in particular in the Windows Fax and Scan software, in the incoming fax properties. In addition, Fax Voip FSP routing methods work not only on Windows Server computers, but also on any workstation, such as Windows 11, Windows 10, Windows 8.1 etc.

The Fax Voip FSP Routing Extension includes the following Incoming Routing Methods that can be configured in the Fax Voip FSP Control Panel:

Route through e-mail

Incoming faxes can be delivered via e-mail to one or more e-mail recipients.

Store in a folder

Incoming faxes can be copied to one or more local or network folder.


This method allows to automatically print Incoming faxes.


This method allows to easy add any routing functionality by using custom application that is started after receiving a fax. The using of this method is not limited by the current licences.

Incoming Methods page contains the following information:

Incoming Method

The Incoming Routing Method name.

Max # of Rules

Total number of rules, that can be used. It is usually the sum of Basic and Additional number of rules.


Basic number of rules, that can be used. Specified as the number of Fax Voip Windows Fax Service Provider Lines + 1. The TRIAL version allows the use of no more than 2 rules of every type.


Additional number of rules, defined by the Fax Voip FSP Extended Fax Routing (E-mail, Store in Folder, Print) license.

The following commands are available in the Incoming Methods Contextual Tab of the Ribbon:

Incoming Methods

Route through e-mail

Click to configure Route through e-mail rules for incoming faxes.

Store in a folder

Click to configure Store in a folder rules for incoming faxes.


Click to configure Print rules for incoming faxes.


Click to configure custom routing for incoming faxes.

Alternatively, you can double-click a method in the Incoming Methods list, or select Edit command from the context menu.

The following diagram provides an overview of the incoming fax routing process:

On Windows Server computer, you can view Fax Voip FSP Routing Extension fax routing methods in the Microsoft Fax Service Manager, see picture below.

When configuring Fax Voip FSP Routing Extension fax routing methods, please take note of the following:

To view Fax Voip FSP Routing Extension log, use Enable Fax Voip FSP Routing Extension debug logging option, see more details in the Fax Voip FSP Logs chapter. To view detailed logs for fax routing methods, use options described in the Incoming Routing Methods Logs chapter of this user manual.