What is a fundamental property of BRI (Basic Rate Interface)?

BRI, or Basic Rate Interface, is a type of ISDN (Integrated Services Digital Network) connection that is designed to provide digital communication services. A fundamental property of BRI is that it comprises two B channels and one D channel. The two B channels are used for transmitting user data (which can include voice, video, or data), allowing for communications to occur simultaneously. The D channel is responsible for signaling and controlling the B channels, handling call setup, teardown, and other control functions.

This structure makes BRI suitable for small offices and residential setups, where multiple communication needs may be required without the complexity and cost of a more extensive ISDN service. The configuration of two B channels allows for a maximum combined data rate of 128 Kbps, which is adequate for many typical uses, such as basic telephony and data services.

The other options describe characteristics that do not correctly reflect the specifications of BRI. For example, BRI does not consist of four B channels and two D channels; instead, it is specifically designed with two B channels. Additionally, it is not limited to data communication only, as it supports voice communication as well. Lastly, BRI is not primarily designed for wireless communication; it is used over physical lines