[Home](./index.md) > [sip.js](./sip.js.md) > [RegisterUserAgentClient](./sip.js.registeruseragentclient.md) ## RegisterUserAgentClient class REGISTER UAC. Signature: ```typescript export declare class RegisterUserAgentClient extends UserAgentClient implements OutgoingRegisterRequest ``` ## Constructors | Constructor | Modifiers | Description | | --- | --- | --- | | [(constructor)(core, message, delegate)](./sip.js.registeruseragentclient._constructor_.md) | | Constructs a new instance of the RegisterUserAgentClient class |