HP ProCurve Secure 7000dl Series Basic Management And Configuration Manual page 733

Appendix B: Glossary
BNC Connectors Bayonet Neill Concelman connectors. Also called British Naval Connector, or
Bayonet Nut Connector. A type of connector used with coaxial cables such as
the RG-58 A/U cable that is used in 10Base-2 Ethernet systems. The basic BNC
connector is a male connector, which is placed at each end of a cable. This
connector has a center pin connected to the center cable conductor and a
metal tube connected to the outer cable shield. A rotating ring outside the tube
locks the cable in place.
BONDING Bandwidth ON Demand INteroperability Group. An organization that created
and raised awareness about the bonding protocol, which is used for aggregat-
ing ISDN channels and links. See also ISDN.
Boot The process of loading and executing the software and commands required
to begin device operation.
bps Bits per second. In data communications, bps is a common measure of data
speed for computer modem and transmission carriers. As the term implies,
the speed in bps is equal to the number of bits transmitted or received each
second.
BRI Basic Rate Interface. An ISDN network interface consisting of two 64 kbps
bearer (B) channels and one 16 kbps signaling (D) channel. The B channels
carry data, voice, or video traffic. The D channel is used to set up calls on the
B channels and carry packet data. A single BRI connection provides a total of
128 Kbps of data across a twisted pair telephone cable. See also ISDN.
BU Backup. A failover power mechanism that allows a system to keep running in
the event of a power failure. This term can also be used to describe a
retrievable copy of data that allows the recovery of important work in the
event of an equipment failure.
Burstiness Sporadic or sudden high usage of bandwidth.
B8ZS Bipolar 8-Zero Substitution. A line coding scheme used to maintain logical-
one density on a T1-carrier line circuit. When a string of 8 zeros is detected,
B8ZS inserts two deliberate bipolar violations that replace the 4th and 7th
consecutive zero bits. These bipolar violations act as timing bits to prevent
synchronization loss. See also T1-carrier line.
C
C-bit Parity A framing format for E3- and T3-carrier lines. C-bit parity creates a block of
unmultiplexed data that uses the C-bit to signal framing.
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