3Com 7600 manual Equipment DCE

2GLOSSARY

cell An ATM Layer protocol data unit (PDU) characterized by fixed, rather than variable, length payloads. The standard ATM cell is 48 bytes of payload with 5 bytes of header.

CELLplex 7000 Switch A high-performance, modular ATM switch.

Cell Loss Priority A bit in the ATM cell header indicating that if there is a need to discard

(CLP) a cell, the cell with the CLP bit marked is to be discarded.

collision Overlapping transmission of two or more nodes onto media. All data is unusable.

connection An ATM connection consists of the concatenation of ATM Layer links in order to provide an end-to-end information transfer capability to access points.

connectionless A form of packet-switching that relies on global addresses in each communications packet rather than on predefined virtual circuits.

connection- A form of packet-switching that requires a predefined circuit from oriented source to destination to be established before data can be transferred.

communications

Data The equipment providing functions that establish, maintain and Communications terminate a data transmission connection.

Equipment (DCE)

Data Terminal The equipment connected to the common carrier communications Equipment (DTE) facility. The DTE is typically a computer system or terminal.

end system A system where an ATM connection is terminated or initiated. An originating end system initiates the ATM connection, and a terminating end system terminates the ATM connection.

Ethernet A CSMA/CD, 10 Mbps, local area data network, developed by Xerox Corporation. It is one of the most popular LANs in use.

header Protocol control information located at the beginning of a protocol data unit.

IEEE 802.3 IEEE standard for Ethernet local area networks.

IEEE 802.1d IEEE standard for bridging.