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Data Circuit-terminating Equipment.
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DCE(1) (Distributed Computing Environment) Software from The Open Group that allows applications to be built across heterogeneous platforms in a network. DCE includes security, directory naming, time synchronization, file sharing, RPCs and multithreading services. See Open Group.
(2) (Data Communications Equipment or Data Circuit-terminating Equipment) A device that establishes, maintains and terminates a session on a network. It may also convert signals for transmission. It is typically the modem. Contrast with DTE.
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