‘3CX Do Not Call’ is a Windows service that monitors all outbound calls. If the dialed number is on an internal Do-Not-Call list, then the call will be dropped; and the dialing extension will receive an email notification if it has been selected in the ‘Send Email’ list.

1.1. How do I Install the ‘3CX Do Not Call’?

VoipTools will give you a download link and license key after purchase. You can simply go through the simple installer to proceed with the installation.

1.2. What Are The Features?

1. Ability to set an expiry date on each entry.

2. Ability to manually add numbers to the list.

3. Receive email notification when calling a number on an internal Do-Not-Call list, if the dialing extension is selected in ‘Send Email’ list.

4. View the call log history of all the extensions that dialed the numbers on ‘Do Not Call List’.


Before installing ‘3CX Do Not Call’, you need to ensure that your computer meets the minimum requirements mentioned below:

1. 3CX Version V16 and V18 (Professional or Enterprise Version Only)

2. Microsoft .Net 4.7.2

3. Microsoft SQL Server 2014 or above (Including the free SQL Express edition)

4. Windows 10 or above / Windows Server 2012 or above (64 bit)

5. Microsoft Internet Information Server (IIS) 7.0 or above

• When installing SQL Server, we recommend you install it in “Mixed Mode” to include SQL Authentication, and install SQL Management Studio

• When installing IIS, be sure to install Basic Authentication, .Net Extensibility, and ASP.Net 4.X


Download software

You can order ‘3CX Do Not Call’ on-line at https://www.voiptools.com.  Your order confirmation email will include your license key and a link to download the software.


Install Prerequisites

There are a number of prerequisites that must be installed prior to installing ‘3CX Do Not Call’. These prerequisites include Microsoft Internet Information Server (IIS) and Microsoft SQL Server

Install ‘3CX Do Not Call’

This User Guide contains step-by-step instructions to successfully install ‘3CX Do Not Call’. Begin by extracting the installer from the downloaded zip file (Step 1 above), then run the setup program named 3CXDoNotCallInstaller.exe

Register your License Key

You must register your license key to activate ‘3CX Do Not Call’. Your license key is included in your order confirmation email, and can also be found in your order history on our website.

4.Step By Step Installation Procedure

The following section guides you through a detailed walk-through of the installation process.

Step 1:  Download ‘3CX Do Not Call’

You can check for the software download link included in your order confirmation email. As an alternative, you can also find the link from your order history on our website.

Step 2:  Extract the installer from the downloaded .zip file

The file you downloaded in the above step is a compressed .zip file.

1. Position the mouse on the zip file and right-click.

2. From the popup menu, select Extract All to extract the software

Step 3: Start the installation process

1. From the extracted folder, find the file 3CXDoNotCallInstaller.exe

2. Double-click the file to start the VoIPTools Setup Wizard.

3. Click Next to continue.

Figure 1: Setup Wizard

Step 4: Download the VoIPTools 3CX Relay (if required)

3CX permits one 3rd party application to communicate with the 3CX server at a time.  To overcome this limitation, VoIPTools created the 3CX Relay Service.  The Relay is a lightweight application that is installed directly on the 3CX server.  The Relay exposes the 3CX Call Control API (and other VoIPTools services) to all our applications, and manages requests and events between VoIPTools products and 3CX.  The Relay also makes it possible to install our VoIPTools products on a remote server (including over the internet).

1. If you have not previously installed the Relay on your 3CX Server, you can download the Relay installer by clicking on the Download Relay button. The Relay must be installed directly on the 3CX server.

2. If you are installing ‘3CX Do Not Call’ directly on the 3CX server, you can install the Relay simply by clicking the Install/ Upgrade Relay button and following the Relay install instructions.

If you have already installed the Relay, you need not install it again unless a newer version is required.

Step 5: Test Relay Settings

1. In the Relay Type drop down, select Legacy Relay for old Relay or New Relay for new Relay based on the 3CX version of your application.

Figure 2: Test VoIPTools 3CX Relay settings

If you choose ‘Relay Type’ as ‘Legacy Relay’ then ‘3CX Do Not Call’ will communicate with old Relay Service, and if you choose ‘New Relay’ then it will communicate with new Relay Service.

2. In the Relay Services Host field, enter “localhost” if installing ‘3CX Do Not Call’ on the 3CX server. If 3CX resides on a different server, enter the IP address or FQDN of the 3CX server.

3. In the Relay Services Port field, enter the value as 8700 for Legacy Relayor 8800 for New Relay.

Figure 3: Relay Services Port

The ‘3CX Do Not Call’ will take default port as 8700 for ‘Legacy Relay’ and 8800 for ‘New Relay’. If the default port number doesn’t appear automatically, you can manually enter the respective default port number.

4. Click Test Relay Settings to confirm ‘3CX Do Not Call’ can communicate with the Relay services running on the 3CX server.

5. If the ‘3CX Do Not Call’ is successfully able to communicate with the Relay services that run on the 3CX server, a Success message box appears. Click OK.

Figure 4: Success message box

6. Click Next to continue the installation.

Step 6: Configure the database
If this is your first install then, select a valid SQL server and if you are reinstalling then select the existing database.

1. When prompted for the database connection information, click Configure.

Figure 5: Configure Database

2. In the Connection Properties dialog box, enter the SQL server name. If using the free SQL Express edition, the default SQL Instance name is SQLExpress.

  • If you want to use ‘SQL Authentication’, then install SQL Server in ‘Mixed‘ mode.
  • If SQL Server is installed on a server other than the server where ‘3CX Do Not Call’ is installed, you will need to configure SQL Server to allow remote connections

Figure 6: Connection Properties

3. Enter the login credentials.

a. If using Windows integrated security, select Use Windows Authentication. The VoIPTools installer will create a local windows user name as “VoIPToys” and will give sufficient rights to this user to create / update the SQL database.

Figure 7: Windows Authentication

b. If SQL Server authentication is desired, select Use SQL Server Authentication. Be sure to select a SQL Login that has sufficient permissions to alter the database and create SQL objects. Enter the User name and Password, and select appropriate database value from the Select or enter a database name drop down.

Figure 8: SQL Server Authentication

The first time you install ‘3CX Do Not Call’, DO NOT enter a database name. Choose Select or enter a database name and leave the database name blank. The installer will create the SQL database automatically and apply the necessary permissions. If upgrading ‘3CX Do Not Call’ from a previous version, select the existing database from the list.

4. Click Test Connection button to confirm you can connect to SQL

5. Click OK to close the test results dialog

6. Click Next to continue the installation

Step 7: Run the Application

Once the installation is complete, click Run Application

Figure 9: Run Application

5.Web Portal

To access the ‘3CX Do Not Call’ web portal, click the Web Portal button on the configuration program, or click on the desktop icon that was created during the installation process (‘3CX Do Not Call’ Web).

When connecting to the web portal, you will be asked to provide login credentials.

1. In the Extension field, enter your 3CX extension number.

2. In the PIN field, enter your 3CX voicemail PIN.

3. Click Login button to login to your account.

4. Check Remember me check box so that next time you can login automatically without providing login credentials.

‘Remember Me’ feature will work until the time cache is not cleared.

Figure 10: ‘3CX Do Not’ Call Web Portal Login

As an agent, you will be able to see only Reports and About screens.

Figure 11: Login View for Agent

5.1.Settings Screen

The Settings screen enables you to register software, set ‘Scheduled Time’ to configure ‘Contact Expiry Date’ so that the contact will delete at the scheduled time, start/stop service, configure culture settings, and email server settings

5.1.1. Register Software (License screen)

Registration is required to authorize your software. Registering also makes it possible for VoIPTools to provide a replacement key if your license key is ever lost. Also, it enables VoIPTools to notify you of any product updates.

1. On the 3CX Do Not Call configuration screen, click Settings tab, and then select License tab.

2. Enter your registration information in all the fields (Note the red dot denotes a required field).

3. Click Register.

Figure 12: 3CX Do Not Call – Registration

The license key permits you to install the software on one computer. This is not free software.

5.1.2. Settings Screen

From here, you can configure ‘Scheduled Time’, and restart ‘3CX Do Not Call’ application with new settings.

Figure 13: Settings: Settings Screen

1. Under General, and in the Scheduled Time field, enter the desired time so that the timer will check regularly at the scheduled time for contacts that have reached expiry date and deletes them contact from the ‘Do Not Call List’.

2. Select either of the desired Block/White List option based on your requirement:

i). Select Block List if you want to block the outbound calls in Contacts list.


ii). Select White List if you want to allow outbound calls in Contacts list but block those that are not in Contacts list.

3. In the NSN Length field, select the desired number (Say, ‘X’ digits for instance) so that, if X digits from the right of the phone number match with that of the imported number then, ‘3CX Do Not Call’ considers the number.

For example, if original number is 18016424655(11 Digits) and configured NSN Length is 10 then, 3CX Do Not Call will match last 10 digits from the right of the original number with that of the imported number i.e. (8016424655). Hence using this feature, our application will work even without a country code.

4. Press Reload button to log all the users out of ‘Do Not Call’ and restart the application with new settings.

5.1.3. General Screen

From here, you can configure Culture settings and start/stop ‘3CX Do Not Call’ service.

Figure 14: Settings: General Screen

• Culture

You can set the default display culture used when displaying dates and times. The portal will automatically update the display of the underlying UTC date/ time stored in the database to the selected culture. This is a global setting.

• From the Display Culture dropdown, select the language to control the display of data for the complete ‘3CX Do Not Call’ web portal. The default language is English-US.

• Start/Stop Service

• To start or stop a service, click Start/ Stop button.

• Click Refresh link to update the status if changes to the service status were made directly in the Windows Service Snap-in.

If the service status is “Unknown”, this is typically caused by the ‘3CX Do Not Call’ IIS Application Pool user may have insufficient rights.

Start/ Stop A Windows Service (3CX Do Not Call) runs in the background. You can monitor the status of this service here (Running, Stopped, Unknown). If you make changes to any of the settings, it is necessary to stop and start the service.
Refresh The ‘Refresh’ link will update the status if changes to the service status were made directly in the Windows Service Snap-in.

5.1.4. Email Screen

From here, you can configure ‘Email Server Settings’.

Figure 15: Settings: Email Screen

• Configure Email Notifications

1. On the Settings screen, click Email .

2. Check the Enable Notifications checkbox if you want to enable email notifications.

• Add Email Address

1. To define who should receive notifications, on the left of Email Address column header, click Add button and add email addresses. The grid supports batch edit which enables you can add or delete or edit multiple addresses before you save update them.

2. In the Email Address field, enter the email address where notifications should be sent.

3. Click Save changes to save the email address to the grid.

• Update Email Address

1. From the Email Address list, select and edit the desired email address that you want to edit.

2. Click Save changes to save the updated email address to the list.

• Delete Email Address

1. In the Email Address list, look for the email address that you want to delete.

2. Beside the desired email address, click Delete button.

3. To save your changes, press the Save Changes button

• Email Notification Settings

1. In the Mail Server text field, enter the mail server name (IP address or ‘Fully Qualified Domain Name’ (FQDN)) from which you want to send the notifications.

2. In the Port field, enter the port number of the mail server. Default port number is 25.

3. In the Reply Address field, enter the email address from which you want to send the notifications.

4. In the User and Password fields, enter the login credentials of the email account from which you want to send the notifications (if required by your mail server).

5. If you want to reveal the password, click the More button; and to conceal it, click the same button once again.

6. Check SSL/TLS check box if your server requires a secure connection to relay email.

7. To test your email settings, you can send a sample email notification to the configured email addresses by clicking on the Test button.

8. Click Save to save all the email server and notification settings.

5.2.Import Screen

You can access Import screen only as a ‘Manager’. Here, you can import contacts from a CSV file into the central repository of contacts.

It is mandatory to restart the ‘Do Not Call’ Service once you import new contacts in order to apply DNC.

Figure 16: Import Screen

• Import Contact List

1. Log into the ‘3CX Do Not Call’ Web Portal with ‘Manager’ credentials.

2. In the Import screen, and in the Import File field, click Browse button to select the import file (.csv).

3. In the List Name field, enter the name for the contact list.

If you do not specify List Name, then the contact will be created without a list name.

4. Select the Delimiter option according to the one that you have specified in the import file (.csv).

Comma is the default delimiter

5. Click Get Fields button to load the CSV column headers into the CSV File list box.
6. Move each one of the columns from the CSV File list box into the CSV Field list box using the appropriate

buttons such that the columns in CSV Field list box will match with those of Contact Field list box.
7. If you want to overwrite existing contacts, check Update existing contacts check box.

Be sure to map the Name and Phone fields.

8. Click Import button to import all the contacts from the CSV file into the central repository of contacts.

• Export Contact Data

1. In the search field, enter SQL query or desired phone/ registered date/ expiry date to filter and display contacts accordingly and then click Apply.

2. Once the grid displays the result, you can export the display data to the desired format by clicking appropriate button. The possible formats are .pdf, .xls, xlsx and .rtf

• Add Extensions to White List

1. In the Settings screen, if you select:

a. Block List then:

i). In the Import screen, you will not be able to call any of the contact numbers in the imported contact list.

ii). To enable desired extensions to call any of the specific contact number, simply expand the desired contact number and then add the desired extensions to the white list.

This functionality will work only for ‘Block List’ and not for ‘White List’.

b. White List then:

i). In the Import screen, you can call all the contact numbers in the imported contact list.

2. Once the grid displays the result, you can export the display data to the desired format by clicking appropriate button. The possible formats are .pdf, .xls, xlsx and .rtf

5.3.Send Email Screen

The Send Email screen enables you to select desired contacts from the list of all the contacts to which you want to send email notification in case if they call the contacts that are in ‘Do Not Call List’

Figure 17: Send Email Screen

1. In the Send Email screen, select all the extensions for which you want to send email notifications.

2. Click Update to save the changes.

If a caller calls an extension on a DNC list then the call simply disconnects and the caller will receive an email notification if selected or will not receive any notification if not selected in the ‘Send Email’ list.

5.4.Reports Screen

The Reports screen enables you to view the history of all the call logs related to ‘Do Not Call List’. The information includes extension number, agent name, dialed number and date & time.

Figure 18: Reports Screen


Visit our website to access our on-line manuals and receive quick answers to most of your questions. Otherwise, you can contact us by phone, email, live chat and on the VoIPTools forums.

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Our forum is intended for VoIPTools customers to collaborate on real-life challenges, solutions and best practices. You can participate on our forum at: https://www.voiptools.com/community/

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If you suspect a bug in any of our VoIPTools products, you can bring it to our notice by reporting your issue at: https://www.voiptools.com/report-a-bug/

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If you purchased our products through a VoIPTools Partner, your Partner will provide first level support. Partners have access to 100% free technical support, provided they participate actively in the troubleshooting process.

VoIPTools customers have access to our on-line manuals and we will respond to emails (next business day) and live chat, but we will not login to your servers remotely.

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