# Bearer Services Integrated Services Digital Network (ISDN) Bearer Services are responsible for the transmission of voice, video, data, and other services over the digital network. These services provide clear channel data transmission through B-channels, typically at 64 Kbps, for various communication purposes. ISDN Bearer Services enable reliable and efficient communication by offering various features such as simultaneous voice and data, high-speed internet access, and secure data transmission. --- # 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/services/bearer-services.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.