Our Subscription (Push Notification) API resource empowers developers to enable their client application(s) to create a single subscription (to one or more extension's) and continually receive push notifications in real time for each subscribed extension.

However, this subscription has an expiration time but using the official RingCentral SDKs enables developers to automatically renew the subscription(s) on a timely basis.

When using this approach for your application(s) to receive events on your RingCentral account, no polling is involved.

Subscription API: https://developer.ringcentral.com/api-docs/latest/index.html#!#Notifications.html

View the (official and community developed) RingCentral SDKs: https://developers.ringcentral.com/library/sdks.html

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Hi 
Benjamin
I am using the RCdotNetXDK c# sdk. using this SDk how can i enable the notification about the incoming call in my application?

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This question would be best asked in the Github Issue Tracker for the C# SDK Repository, here: https://github.com/ringcentral/ringcentral-csharp/issues

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