# ISDN Router An ISDN (Integrated Services Digital Network) router is a networking device that uses ISDN technology to allow for the simultaneous digital transmission of voice, video, data, and other network services over the traditional circuits of the public switched telephone network. These routers are used to connect local networks to ISDN lines, providing reliable and faster Internet connection compared to traditional modems. ISDN routers typically support multiple B-channels for voice and data communications, offering enhanced bandwidth options for businesses and residential users. --- # 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/devices/isdn-router.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.