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While Fonoster supports multiple SIP providers, Twilio is one of the easiest to set up. This guide will show you how to link a Twilio phone number to your application using the command-line tool.
1

Request early access

To get started, you’ll need a Fonoster account. Sign up at https://app.fonoster.com/auth/signup
2

Sign up for a Twilio account

You need a Twilio account to link a Twilio phone number to your Fonoster application. You can sign up for a Twilio account by visiting the Twilio website and following their documentation.
3

Link your virtual phone number

Follow the next steps to link a virtual phone number to your application:
Fonoster CTL is a command-line tool that allows you to manage your Fonoster resources. You can create, update, and delete Fonoster resources like phone numbers, SIP trunks, etc.You can install the tool using the following command:
npm install -g @fonoster/ctl
Check that the installation was successful by running the following command:
fonoster --version
If the installation was successful, you should see the version number of the command-line tool.
Before using the command-line tool, log in to a Workspace. You can do this by running the following command:
fonoster workspaces:login
This command will prompt you to enter your AccessKeyId and AccessKeySecret. Once you have entered this information, you will be logged in to your Workspace.
To create a new Application, you can use the following command:
fonoster applications:create
You will be asked to enter the Application’s name, speech information, and other details. Once you have entered this information, the Application will be created.Your output should look like this:Yo can list your existing applications with the following command:
fonoster applications:list
You can use the command-line tool or the SDK to make an outbound call. To make an outbound call, first, you need the reference of the application you created. You can get the reference by running the following command:
fonoster applications:list
Once you have the reference, you can use the fonoster sipnet:calls:create command to make an outbound call. Here is an example:
fonoster sipnet:calls:create --app-ref 4b01c9b1-8cb1-48fb-bd49-f3daf13463a9 \
 --from +18456134823 \
 --to +17853134923
You can also use the SDK to make an outbound call. To do this, you can use the following code:
call.js
const SDK = require("@fonoster/sdk");

# Replace with your Workspace Access Key Id
const client = SDK.Client({ accessKeyId: "00000000-0000-0000-0000-000000000000" });

client.loginWithApiKey("AP0eerv2g7qow3e950k7twu4rvydcunq3k", "fNc...")
  .then(async() => {
    const calls = new SDK.Calls(client);

    const response = await calls.createCall({
      from: "+18456134823",
      to: "+17853134923",
      appRef: "4b01c9b1-8cb1-48fb-bd49-f3daf13463a9"
    })

    console.log(response);
  });
Replace the example values with the appropriate ones.
Now that you have linked a Twilio phone number to your application, you can start making and receiving calls using the command-line tool or the SDK.

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