An inbound screen pop can be created to provide more information about a caller by leveraging the incoming call caller ID associated to bring up additional information about that user, whether that information is in a CRM, Helpdesk or other application. There are two popular approaches for this:

1. Out-of-the-Box Softphone Integration: When using the RingCentral softphone, it can be configured to launch an application and provide it with the caller ID. A common approach with web applications is to launch a URL that includes the caller ID. In this case, the web application just needs to have a contact page that can be retrieved via the caller's phone number in the URL. The RingCentral component of this is described in more detailed in the RingCentral for Desktop User Guide under Settings > General > Launch an external app or a URL on incoming call.
2. Custom Integration: To create a deeper, custom integration, without reliance on the softphone, developers can by subscribing for notifications which will send events with for incoming calls with the caller ID information which can be used to take action. These subscriptions can occur on the client or the server after which the app can bring up a webpage or a dialog or chat window for the incoming call for the user. A call end event is also provided so the app will know and can instruct the user to take actions such as filling out call notes, etc.