[Home](./index.md) > [sip.js](./sip.js.md) > [UserAgentOptions](./sip.js.useragentoptions.md) ## UserAgentOptions interface Options for [UserAgent](./sip.js.useragent.md) constructor. Signature: ```typescript export interface UserAgentOptions ``` ## Properties | Property | Type | Description | | --- | --- | --- | | [allowLegacyNotifications](./sip.js.useragentoptions.allowlegacynotifications.md) | boolean | If true, the user agent will accept out of dialog NOTIFY. | | [allowOutOfDialogRefers](./sip.js.useragentoptions.allowoutofdialogrefers.md) | boolean | If true, the user agent will accept out of dialog REFER. | | [authorizationPassword](./sip.js.useragentoptions.authorizationpassword.md) | string | Authorization password. | | [authorizationUsername](./sip.js.useragentoptions.authorizationusername.md) | string | Authorization username. | | [autoStart](./sip.js.useragentoptions.autostart.md) | boolean | | | [autoStop](./sip.js.useragentoptions.autostop.md) | boolean | If true, the user agent calls the stop() method on unload (if running in browser window). | | [delegate](./sip.js.useragentoptions.delegate.md) | UserAgentDelegate | Delegate for [UserAgent](./sip.js.useragent.md). | | [displayName](./sip.js.useragentoptions.displayname.md) | string | The display name associated with the user agent. | | [forceRport](./sip.js.useragentoptions.forcerport.md) | boolean | Force adding rport to Via header. | | [hackAllowUnregisteredOptionTags](./sip.js.useragentoptions.hackallowunregisteredoptiontags.md) | boolean | Hack | | [hackIpInContact](./sip.js.useragentoptions.hackipincontact.md) | boolean | string | Hack | | [hackViaTcp](./sip.js.useragentoptions.hackviatcp.md) | boolean | Hack | | [hackWssInTransport](./sip.js.useragentoptions.hackwssintransport.md) | boolean | Hack | | [logBuiltinEnabled](./sip.js.useragentoptions.logbuiltinenabled.md) | boolean | Indicates whether log messages should be written to the browser console. | | [logConfiguration](./sip.js.useragentoptions.logconfiguration.md) | boolean | If true, constructor logs the user agent configuration. | | [logConnector](./sip.js.useragentoptions.logconnector.md) | LogConnector | A function which will be called every time a log is generated. | | [logLevel](./sip.js.useragentoptions.loglevel.md) | LogLevel | Indicates the verbosity level of the log messages. | | [noAnswerTimeout](./sip.js.useragentoptions.noanswertimeout.md) | number | Number of seconds after which an incoming call is rejected if not answered. | | [preloadedRouteSet](./sip.js.useragentoptions.preloadedrouteset.md) | Array<string> | Adds a Route header(s) to outgoing requests. | | [reconnectionAttempts](./sip.js.useragentoptions.reconnectionattempts.md) | number | | | [reconnectionDelay](./sip.js.useragentoptions.reconnectiondelay.md) | number | | | [sessionDescriptionHandlerFactory](./sip.js.useragentoptions.sessiondescriptionhandlerfactory.md) | SessionDescriptionHandlerFactory | A factory for generating SessionDescriptionHandler instances. | | [sessionDescriptionHandlerFactoryOptions](./sip.js.useragentoptions.sessiondescriptionhandlerfactoryoptions.md) | object | Options to passed to sessionDescriptionHandlerFactory. | | [sipExtension100rel](./sip.js.useragentoptions.sipextension100rel.md) | SIPExtension | Reliable provisional responses. https://tools.ietf.org/html/rfc3262 | | [sipExtensionExtraSupported](./sip.js.useragentoptions.sipextensionextrasupported.md) | Array<string> | Extra option tags to claim support for. | | [sipExtensionReplaces](./sip.js.useragentoptions.sipextensionreplaces.md) | SIPExtension | Replaces header. https://tools.ietf.org/html/rfc3891 | | [sipjsId](./sip.js.useragentoptions.sipjsid.md) | string | An id uniquely identify this user agent instance. | | [transportConstructor](./sip.js.useragentoptions.transportconstructor.md) | new (logger: any, options: any) => Transport | A constructor function for the user agent's Transport. | | [transportOptions](./sip.js.useragentoptions.transportoptions.md) | any | An options bucket object passed to transportConstructor when instantiated. | | [uri](./sip.js.useragentoptions.uri.md) | URI | SIP Addresses-of-Record URI associated with the user agent. | | [userAgentString](./sip.js.useragentoptions.useragentstring.md) | string | User agent string used in the UserAgent header. | | [viaHost](./sip.js.useragentoptions.viahost.md) | string | Hostname to use in Via header. |