GLOSSARY
a common protocol. Bridges can usually be made to filter certain packets (to forward only certain traffic).
Broadband - a service or system requiring transmission channels capable of supporting rates greater than the Integrated Services Digital Network (ISDN) primary rate.
Broadband Access - an ISDN access capable of supporting one or more broadband services.
Brouter (bridging/router) - a device that routes some protocols and bridges others based on configuration information.
BUS (Broadcast and Unknown Server) - in an emulated LAN, the BUS is responsible for accepting broadcast, multicast, and unknown unicast packets from the LECs to the broadcast MAC address (FFFFFFFFFFFF) via dedicated
CAC (Connection Admission Control) - the procedure used to decide if a request for an ATM connection can be accepted based on the attributes of both the requested connection and the existing connections.
Call - an association between two or more users or between a user and a net- work entity that is established by the use of network capabilities. This associ- ation may have zero or more connections.
CBR (Constant Bit Rate) - a type of traffic that requires a continuous, specific amount of bandwidth over the ATM network (e.g., digital information such as video and digitized voice).
cchan - a FORE program used to manage virtual channels on a FORE Systems ATM switch running asxd.
CCITT (International Telephone and Telegraph Consultative Committee) - the international standards body for telecommunications.
CDV (Cell Delay Variation) - a quantification of cell clumping for a connec- tion. The cell clumping CDV (yk) is defined as the difference between a cell’s expected reference arrival time (ck) and its actual arrival time (ak). The expected reference arrival time (ck) of cell k of a specific connection is max [c{k – 1} + T, ak ] . T is the reciprocal of the negotiated peak cell rate.
CE (Connection Endpoint) - a terminator at one end of a layer connection within a SAP.
CEI (Connection Endpoint Identifier) - an identifier of a CE that can be used to identify the connection at a SAP.
Cell - an ATM Layer protocol data unit (PDU).
