# Network Termination ISDN (Integrated Services Digital Network) utilizes network termination devices to connect customer premises equipment (CPE) to the network. There are two primary types: * **NT1 (Network Termination 1):** Interfaces directly with the network, converting between BRI (Basic Rate Interface) signals and digital signals suitable for the local loop. * **NT2 (Network Termination 2):** Functions at a higher layer, managing multiple data channels and often includes routing, multiplexing, and switching functionalities. These devices ensure proper signal transmission and network connectivity for ISDN services. --- # 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/network-termination.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.