[Home](./index.md) > [sip.js](./sip.js.md) > [Session](./sip.js.session.md) ## Session class A session provides real time communication between one or more participants. Signature: ```typescript export declare abstract class Session ``` ## Remarks The transport behaves in a deterministic manner according to the the state defined in [SessionState](./sip.js.sessionstate.md). The constructor for this class is marked as internal. Third-party code should not call the constructor directly or create subclasses that extend the `Session` class. ## Properties | Property | Modifiers | Type | Description | | --- | --- | --- | --- | | [assertedIdentity](./sip.js.session.assertedidentity.md) | | NameAddrHeader | undefined | The asserted identity of the remote user. | | [data](./sip.js.session.data.md) | | any | Property reserved for use by instance owner. | | [delegate](./sip.js.session.delegate.md) | | SessionDelegate | undefined | The session delegate. | | [dialog](./sip.js.session.dialog.md) | | SessionDialog | undefined | The confirmed session dialog. | | [id](./sip.js.session.id.md) | | string | A unique identifier for this session. | | [localIdentity](./sip.js.session.localidentity.md) | | NameAddrHeader | The identity of the local user. | | [logger](./sip.js.session.logger.md) | | Logger | Logger. | | [remoteIdentity](./sip.js.session.remoteidentity.md) | | NameAddrHeader | The identity of the remote user. | | [replacee](./sip.js.session.replacee.md) | | Session | undefined | The session being replace by this one. | | [sessionDescriptionHandler](./sip.js.session.sessiondescriptionhandler.md) | | SessionDescriptionHandler | undefined | Session description handler. | | [sessionDescriptionHandlerFactory](./sip.js.session.sessiondescriptionhandlerfactory.md) | | SessionDescriptionHandlerFactory | Session description handler factory. | | [state](./sip.js.session.state.md) | | SessionState | Session state. | | [stateChange](./sip.js.session.statechange.md) | | Emitter<SessionState> | Session state change emitter. | | [userAgent](./sip.js.session.useragent.md) | | UserAgent | The user agent. | ## Methods | Method | Modifiers | Description | | --- | --- | --- | | [dispose()](./sip.js.session.dispose.md) | | Destructor. | | [invite(options)](./sip.js.session.invite.md) | | Renegotiate the session. Sends a re-INVITE. |