[Home](./index.md) > [sip.js](./sip.js.md) > [ServerTransaction](./sip.js.servertransaction.md) > [(constructor)](./sip.js.servertransaction._constructor_.md) ## ServerTransaction.(constructor) Constructs a new instance of the `ServerTransaction` class Signature: ```typescript protected constructor(_request: IncomingRequestMessage, transport: Transport, user: ServerTransactionUser, state: TransactionState, loggerCategory: string); ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | \_request | IncomingRequestMessage | | | transport | Transport | | | user | ServerTransactionUser | | | state | TransactionState | | | loggerCategory | string | |