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Glossary
Glossary-5
bps
Bits per second. A unit for measuring the data rate.
BRI
Basic Rate Interface. An ISDN interface that consists of two 64Kbps
B channels for voice or data and one 16Kbps D channel for signaling. Compare PRI.
broadcast address
A special address reserved for sending a message to all stations. Generally, a broadcast
address is a media access control (MAC) destination address of all 1s (ones).
broadcast packets
Packets that are sent to all network nodes.
C
callback
A port configuration allowing the PortMaster to call back dial-in users before providing
access. Callback provides an extra layer of security and can simplify telephone charges.
CCITT
Consultative Committee for International Telegraph and Telephone. International
organization formerly responsible for the development of communications standards.
Now called the ITU-T. See also ITU-T.
CD
Carrier Detect. A signal that indicates whether an interface is active. Also, a signal
generated by a modem indicating that a call has been connected.
Challenge Handshake Authentication Protocol
See CHAP.
channelized T1
An access link operating at 1.544Mbps that is subdivided into 24 channels of 56Kbps each
for dial-in use.
channel service unit
See CSU.