B channel
The ISDN circuit-switched bearer channels, capable of transmitting 64kps of digitized information.

Bandwidth
In casual use, the amount of information that can be transmitted in an information channel. High bandwidth Internet access means those web graphics load quickly on Netscape. High bandwidth videoconferencing means that the picture and the sound will be clear.

Bps
Bits per second. A measure of the data transfer rate of the data channel. See also baud and bit/s.

Bit/s
Bits per second. A measure of the data transfer rate of the data channel.

Bit rate
The number of bits of information transmitted over a channel in a given second. Typically expressed bps.

Bluetooth
A specification for seamless wireless short-range communications of data and voice between both mobile and stationary devices.

Bonding
Bandwidth ON Demand Inverse Network group.

Bridge
In videoconferencing vernacular, a bridge connects three or more conference sites so that they can simultaneously communicate. Bridges are often called MCUs - Multiple Conferencing Units. A bridge is also considered a device that interconnects LAN segments at the data-link layer of the OSI model to extend the LAN environment physically. They work with frames of data, forwarding them between networks. They learn station addresses and they resolve problems with loops in the topology by participating in the spanning tree algorithm. Finally, the term bridge can be used in audio conferencing to refer to a device that connects multiple (more than two) voice calls so that all participants can hear and be heard.

BRI. Basic Rate Interface
In ISDN there are two interfaces, the BRI and the PRI or Primary Rate Interface. The BRI offers two circuit-switched B (bearer) channels of 64 kbps each and one packet-switched 16 kbps D (delta) channel that is used for exchanging signals with the network.

Broadband
A high-capacity communications circuit/path. It usually implies a speed greater than 1.544 Mbps. (Contrast with wideband and narrowband).

BT
BT formerly known as British Telecommunications plc.
http://www.bt.com/