In
telecommunication, a
distributed-queue dual-bus [network] (DQDB) is a distributed multi-
access network that (a) supports integrated
communications using a
dual bus[?] and distributed queuing, (b) provides access to local or metropolitan area networks, and (c) supports connectionless
data transfer,
connection-oriented data transfer, and
isochronous communications, such as voice communications.
Source: from Federal Standard 1037C