[Home](./index.md) > [sip.js](./sip.js.md) > [SubscriptionDelegate](./sip.js.subscriptiondelegate.md) > [onRefresh](./sip.js.subscriptiondelegate.onrefresh.md) ## SubscriptionDelegate.onRefresh() method Sent a SUBSCRIBE request. This includes "auto refresh" in dialog SUBSCRIBE requests only. Thus SUBSCRIBE requests triggered by calls to `refresh()` or `subscribe()` will not be provided. Thus the first SUBSCRIBE (the subscription creating SUBSCRIBE) will not be provided. Signature: ```typescript onRefresh?(request: OutgoingSubscribeRequest): void; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | request | OutgoingSubscribeRequest | Outgoing SUBSCRIBE request. | Returns: `void`