# BRI - Basic Rate Interface **Basic Rate Interface (BRI)** is a configuration for Integrated Services Digital Network (ISDN) that provides two 64 Kbps bearer channels (B channels) and one 16 Kbps data channel (D channel). The B channels are used for voice, video, or data transmission, while the D channel is used for signaling and control. This setup allows for simultaneous data and voice transmission, making it useful for small businesses and homes. BRI is characterized by its relatively low cost and simplicity, making it suitable for basic digital communication needs. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://isdn.learn-telecom.com/interfaces/bri-basic-rate-interface.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.