TryLearn More

Use SIP trunks, WebRTC & Apps

Slash your Phone Bill by 80%

NASK SA - SIP Trunk

On this topic

About NASK SA

System Preparation

3CX Version

Provider Capabilities

Configuring the Trunk with 3CX

Adding the Trunk

Adding Additional DIDs

Creating Inbound Rules

Number Format

General

Outbound Caller ID

Outbound Rules

About NASK SA

NASK SA is a Polish SIP Trunk provider. The range of services they offer is constantly expanding therefore innovative telecommunications services are introduced regularly as well as a number of add-on services.

Reference website: NASK SA

System Preparation

Before configuring the SIP trunk it is required to go through the following checklist and make changes where necessary:

Further setup information can be found in our Academy: 3CX Academy Basic Course

3CX Version

Some providers gained support and compatibility with 3CX on a specific product version. It is advisable to always run the latest version of 3CX to ensure ongoing compatibility.

Minimum 3CX Version: 3CX v15.5 SP3

Provider Capabilities

Below is a short overview of the provider's capabilities and services and whether they’re supported or not:

  • CLNS (Clip No Screening): Yes
  • Catch All Routing: Yes
  • Fax T.38 support: Yes
  • CLIR (Number Suppression): Yes
  • DTMF via RFC 2833: Yes
  • Codec Order: G711U, G711A, GSM-FR
  • NAT Support: Yes

Configuring the Trunk with 3CX

The general instructions outlining how to add a new SIP Trunk to your 3CX installation can be found here.

Adding the Trunk

Go to “SIP Trunks” and select “Add SIP Trunk”

  • Select Country: PL
  • Select Provider in your Country: NASK SA
  • Main trunk number: This will have been provided to you by NASK SA. You must enter the number in the international number format (e.g.482038839120)
  • Press OK

Under the “General” tab in the “Authentication” section, enter  your Authentication ID and Password (these will be supplied to you by NASK SA).

Once you have filled in these fields as given to you by NASK SA, scroll to the top of the page and press OK. At this point if you refresh the page you should see your NASK SA Trunk appear as Registered.

Adding Additional DIDs

To associate all other DIDs/Numbers you have in your  NASK SA account with 3CX, go to the Management Console → SIP Trunks, double-click on your  NASK SA Trunk and go to the “DIDs” tab.

Here you should already see 1 entry; that is the Main Trunk number you have set. Add all other DIDs/Numbers you have to the list in a international number format (e.g. 482038839120) and press OK.

Creating Inbound Rules

Now that you have associated all your DIDs/Numbers with your SIP Trunk in 3CX, you can create Inbound Rules to set where calls will be routed when those numbers are called. Instructions on how to create Inbound Rules can be found here.

Number Format

General

When configuring NASK SA SIP Trunks in 3CX, all numbers should be entered in a international number format (e.g. 482038839120), otherwise call routing will fail.

Outbound Caller ID

NASK SA Trunks support Clip No Screening which means you can present any number as Outbound Caller ID.

Outbound Rules

When configuring your Outbound Rules make sure that all numbers are dialed either in the National (e.g. 2038839120) or  International (e.g. 00482038839120) format. More information about how to create Outbound Rules and how they work can be found here.

Free for up to 1 year! Select preferred deployment:

On-Premise

for Linux on a $200 appliance or as a VM

Get the ISO

On-Premise

for Windows as a VM

Download the setup file

On the cloud

In your Google, Amazon, Azure account

Take the PBX Express