[Home](./index.md) > [sip.js](./sip.js.md) > [Subscriber](./sip.js.subscriber.md) > [subscribe](./sip.js.subscriber.subscribe.md) ## Subscriber.subscribe() method Subscribe to event notifications. Signature: ```typescript subscribe(options?: SubscriberSubscribeOptions): Promise; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | options | SubscriberSubscribeOptions | | Returns: `Promise` ## Remarks Send an initial SUBSCRIBE request if no subscription as been established. Sends a re-SUBSCRIBE request if the subscription is "active".