[Home](./index.md) > [sip.js](./sip.js.md) > [ReferUserAgentClient](./sip.js.referuseragentclient.md) ## ReferUserAgentClient class REFER UAC. Signature: ```typescript export declare class ReferUserAgentClient extends UserAgentClient implements OutgoingReferRequest ``` ## Constructors | Constructor | Modifiers | Description | | --- | --- | --- | | [(constructor)(dialog, delegate, options)](./sip.js.referuseragentclient._constructor_.md) | | Constructs a new instance of the ReferUserAgentClient class |