Build Cordova plugin for SIP call software (Comelit intercom software) -- 2

We would like to integrate an third party software (SIP call) into our software, so that we can apply the SIP video call functions in our software. Our software is developed in Cordova and the third party is in Native so we need to convert their functions as cordova plugins for both IOS/Android. The third party software is Comelit intercome software, it can be found from IOS/Android store. Condo Intercom Working Scenario: There will be a call panel outside lobby door, when Visitor / Deliverer reach condo, they press the unit number of resident. Then resident phone app will receive notification of calling in request. Then resident open app (or agree to call) to talk to visitor via call panel. There will be a camera on call panel so that resident can see video stream from app. After varified, resident press "open door" button on app then the lobby door will be opened. Key feature to be implemented: - SIP call functionality - Door open functionality - SIP notification (like whatsapp) The android third party software source code and SIP settings will be [login to view URL] door bell panel set is in our office so that we can do online test. We only need the cordova plugin to let our app gain the same functions. Additionally, We also need a demo cordova app to show the functionality. Further support to be provided for assistance of applying this plugin into cordova app and other matters.