[Home](./index.md) > [sip.js](./sip.js.md) > [SubscriptionDelegate](./sip.js.subscriptiondelegate.md) ## SubscriptionDelegate interface Delegate for [Subscription](./sip.js.subscription.md). Signature: ```typescript export interface SubscriptionDelegate ``` ## Methods | Method | Description | | --- | --- | | [onNotify(notification)](./sip.js.subscriptiondelegate.onnotify.md) | Called upon receiving an incoming in dialog NOTIFY request. |