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2.2 | WAN Devices |
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2.2.4 | CSU/DSUs on a WAN |
A CSU/DSU is a digital-interface device-or sometimes two separate
digital devices-that adapts the physical interface on a DTE device
(such as a terminal) to the interface of a DCE device (such as a
switch) in a switched-carrier network. The Figure illustrates the placement of the CSU/DSU
in a WAN implementation. Sometimes, CSUs/DSUs are integrated in the
router box.
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