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Directcall - SIP Trunk

On this topic

About Directcall

System Preparation

3CX Version

Provider Requirements

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 Directcall

Directcall’s mission is to provide IP telephony based on quality of service and innovation. In providing their SIP trunking services to some of the biggest companies in Brazil, they ensure a reliable, high-performing solution at an affordable rate.

Reference Web Address: Directcall

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 Phone System 15.5

Provider Requirements

Before being able to configure your Directcall SIP Trunk with 3CX, you must contact a Directcall representative. They will provide you with all the necessary information required to configure the Trunk. How to use this information will be explained in this guide.

Important: Make sure you mention to your Directcall representative that you will be using Directcall with 3CX so that they provide you with numbers of SCM Type. If the numbers you are given are not of this type, you may run into issues regarding CLI presentation and/or making outbound calls.

Provider Capabilities

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

  1. CNS (Clip No Screening): No
  2. Catch All Routing: Yes
  3. Fax in T38: No
  4. CLIR (Number Suppression): No
  5. DTMF via RFC 2833: Yes
  6. Codec Order: G729
  7. NAT Support: Yes

Configuring the Trunk with 3CX

Adding the Trunk

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

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

  • Select Country: BR
  • Select Provider in your Country: Directcall
  • Main trunk number: The DID numbers associated with your account will have been given to you by Directcall. Enter one of them in the international number format (e.g. 55xxxxxxxxxx).
  • Press OK

This will then take you to the SIP Trunk settings. Under the “General” tab in the “Trunk Details” section enter the Registrar IP address provided to you by Directcall.

While still in the “General” tab, scroll down to the “Authentication” section and fill in the Authentication ID and Password as given to you by your Directcall representative.

After doing this, scroll to the top of the page and press OK to create the SIP Trunk in 3CX. At this point your Directcall Trunk should be registered.

Adding Additional DIDs

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

Here you should already see 1 entry that is the Main Trunk number you have you entered in the previous section. To add all other DIDs/Numbers, you must list them in the international number format (e.g. 55xxxxxxxxxx). Once you have added all your numbers to the list, press OK at the top of the page.

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 Directcall SIP Trunks in 3CX, all numbers should be entered in a 8-digit format otherwise calls will be rejected.

Outbound Caller ID

Directcall SIP Trunks do not support Clip No Screening which means you cannot present any number you want when calling outbound. Only Numbers/DIDs that are associated with your trunk can be sent, not numbers from a 3rd party.

In order to be able to present a number that is associated with your account, in all fields in 3CX where you can set the Outbound Caller ID, it must be input in the international number format (e.g. 55xxxxxxxxxx)

Outbound Rules

In order to make outbound calls using your Directcall SIP Trunk, all numbers must be dialed in the international number format (e.g. 55xxxxxxxxxx). In order to bring all dialed number into this format, you can use the 3CX Outbound Rules.

More information about how to create Outbound Rules and how they work can be found here.

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