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  • Can I make an outbound call to the SIP URI of a Plivo application?

    Yes, you can make an outbound call to the SIP URI of a Plivo application. For example, you can make an HTTP POST request to originate an outbound call to "," which is the SIP URL used to identify the Plivo application.

    If you’re expecting to receive calls to your SIP URI, you must create an SIP endpoint that's attached to your Plivo application in the Endpoint tab. Share this endpoint with others, not the SIP URL of your application.

  • Can I register a single endpoint on different devices?

    Yes, you can register a single endpoint in different devices, but we don't recommend this because it can cause confusion. The softphone, hardphone, or Android, iOS, or web app that you logged in to most recently using your endpoint will be the default destination to make and receive calls, and that may cause conflicts with other devices you wish to use to make or receive calls.

  • Troubleshooting Plivo Endpoints

    This guide talks about things to look for if you face any of these issues while using Plivo endpoints to make and receive calls:

    • Unable to log in 
    • Unable to make calls
    • Unable to receive calls
    • Call disconnected 
    • Poor call quality

    Unable to log in

    Make sure that you're using the right credentials. You can find the credentials on the console Endpoints page


    Username (25 alphanumeric characters are allowed) + 12-digit number added by Plivo

    For example: <username> + 123456788910 (added by Plivo). No special characters are allowed.


    Your password may be alphanumeric and may contain special characters.

    Character limit: 32 characters

    Alias name

    Alphanumeric characters are allowed, special characters are not allowed. 

    Character limit: 50 characters

    Unable to make or receive calls

    • Check whether the endpoint is configured properly and registration was successful. You can also trigger the retrieve an endpoint method to retrieve endpoint details.
    • Make sure you've set up the proper application to the endpoint to make calls. You can use the direct dial app to make calls using an endpoint.

    Direct dial: PUT YOUR CALLER ID HERE 

    You should have this URL as answer_url for the application that's assigned to the Plivo endpoint.

    Call disconnected

    • Check the session expiry time that's set up in the softphone, hardphone, or SDK.
    • If everything is fine, and if the call was not disconnected by the caller or call recipient, then please contact so that our support team can investigate the issue.

    Call quality

    VoIP call quality depends on the following factors:

    • Caller and call recipient network connection
    • Local network setup
    • Caller and recipient’s phone networks
    • Headset functionality
    • Plivo’s partner carrier
  • What softphones are supported for Plivo endpoints?

    We support and recommend softphones such as X-Lite (Bria Solo) and Zoiper. For security reasons we do not support VaxSIPUserAgent or Ozeki SIP user agents. You won’t be able to use Plivo endpoints with these softphones.

  • How can I receive calls on a SIP endpoint?

    You can either directly receive calls on a softphone, hardphone, web application, Android app, or iOS app in which the Plivo endpoint has been configured, or receive an inbound call to a Plivo DID number that can be redirected to an endpoint.

    Inbound calls directly to endpoints

    You can make calls from a SIP endpoint to another SIP endpoint by dialing out to the SIP URI of the endpoint. Find the SIP URI for an endpoint on the Endpoints page of the Plivo console and click on the plus sign for the endpoint for which you need the SIP URI.

    Note: You can make calls to an endpoint from a Plivo endpoint or an external SIP endpoint if the external VoIP provider supports that. Alternately, you can make calls to an endpoint using our outbound call method.

    Inbound call to DIDs redirected to endpoints

    You can use the demo call forwarding application to redirect the inbound calls to a DID and then to an endpoint.

    Demo call forward


    In this example, is the SIP URI of the endpoint to which you want calls to be redirected.

    Alternatively, you can set up call forwarding with the help of a Dial XML element, similar to the example laid out below, which can redirect calls to the endpoint.



            <User sendDigits="wwww2410"></User>



    Answer_url attached to the Plivo DID should return XML code like the example above.

    Note: The endpoint should be assigned with direct-dial application. YOUR CALLER ID HERE

    You can use your desired phone number as the caller ID.

  • How can I make an outbound call using an endpoint?

    You can use a Plivo endpoint with a SIP phone, like X-Lite or Zoiper, to make and receive calls. You can also use our Browser SDK, Android SDK, or iOS SDK to make and receive calls.

    How to configure a SIP endpoint with a SIP phone

    1. To create a SIP endpoint, navigate to the Add New Endpoint page of the Plivo console.
    2. Add the endpoint as a direct dial application so you can make and receive calls. Navigate to the Add New Application page of the console and add the answer_URL of the application as PUT YOUR CALLER ID HERE. 
    3. Ensure that you replace the caller ID with your desired phone number.
    4. Assign the application to the SIP endpoint you created.

    Follow the instructions for X-Lite or Zoiper or use our SDK to make and receive calls.

  • How do I register an endpoint on my VoIP or softphone?


    Plivo extends the capabilities of your existing SIP phones, allowing you to add custom business logic when calls are made or received. 

    Traditionally, SIP phones had very basic functionality and needed to be connected to a PBX. Plivo endpoints eliminate the need to set up and manage a phone system. Any Plivo application can implement the business logic needed to control a SIP phone using any of several web languages without any telecom background knowledge needed. Plivo supports all popular SIP-based softphones and hardware phones, including Bria, Cisco, and Polycom.

    Some interesting capabilities to add to your existing SIP phones:

    1. Instant conferencing: Calls made through a SIP phone registered with Plivo can directly be added to a conference bridge.

    2. Access control: With a few lines of code, you can add the ability to restrict calls made from SIP phones or limit the phone to only receive calls.

    3. Monitoring and reporting: Monitor and report all calls made or received using a SIP phone. Create custom dashboards to analyze the data collected using the APIs.

    4. Smart routing: Add intelligent extensions and shortcuts which route calls to and from traditional phone networks and WebRTC-enabled phones. 

    How it works

    Once your SIP phone is configured and set up, your device will register with and establish a connection to Plivo. When you initiate a call using the SIP phone, you’re not connecting to another phone or extension directly. Rather, you’re instructing Plivo to fetch XML from the attached application on your server to handle the call request. This is similar to the way Plivo handles incoming calls from a regular phone number. All Plivo XML elements are available to handle the call request. You can also use the <Dial> element to dial to a regular phone, WebRTC device, or any other SIP phone.

    Getting started

    1. Sign up for a Plivo account.

    2. Add an endpoint using the Plivo console and fill in the required details.

    3. Make a note of the username Plivo assigns you. Plivo will add random numbers to your username, so it will look something like yodaXXXXXX. For the purpose of this tutorial, we'll use username yodaXXXXXX, password obiwan, alias obiwan.

    Configure your SIP phone

    Download and install a softphone. If you're on Mac or Windows, download X-Lite (now called Bria Solo Free). If you're on Linux, download Blink. For this tutorial, we'll use the X-Lite softphone.

    Launch X-Lite and navigate to Preferences. Click on the Accounts tab and click the "+" icon to add an account.


    Add the credentials of the endpoint you created: User ID yodaXXXXXX, password obiwan, domain, display name Yoda, authorization name yodaXXXXXX (same as your username).

    Note: Field names may vary based on the make and model of your SIP phone. All the configurations will remain in each case.


    Click OK when you’re done.

    Your endpoint entry in the list should as “enabled.” This indicates that your SIP phone has successfully registered with Plivo.

    Using a default dialer app

    To start making a call, attach the default direct-dial app to the endpoint you just created. Go to the Endpoints tab and click on the endpoint username to open an endpoint edit window. Select the Direct Dial app from the Application dropdown list.


    Next steps: customizing the endpoint app

    When a call is made from the softphone, Plivo will send a request to the answer URL of the application attached to the endpoint with the parameters related to the call. Plivo expects a valid XML response from the answer URL in order to proceed with the call. 

    Let’s assume that we want to create a simple dial application and make an outbound call to the number entered from the softphone. The answer URL will receive a request with the From and To parameters. We need to parse these parameters and return a Dial XML element with the appropriate attributes.


    <Dial callerId="18004321321">




    When the above XML is returned on the request, Plivo will make an outbound call to 18001231234 and connect it with the softphone.