[Home](./index.md) > [sip.js](./sip.js.md) > [RegisterUserAgentServer](./sip.js.registeruseragentserver.md) ## RegisterUserAgentServer class REGISTER UAS. Signature: ```typescript export declare class RegisterUserAgentServer extends UserAgentServer implements IncomingRegisterRequest ``` ## Constructors | Constructor | Modifiers | Description | | --- | --- | --- | | [(constructor)(core, message, delegate)](./sip.js.registeruseragentserver._constructor_.md) | | Constructs a new instance of the RegisterUserAgentServer class | ## Properties | Property | Modifiers | Type | Description | | --- | --- | --- | --- | | [core](./sip.js.registeruseragentserver.core.md) | | UserAgentCore | |