Data terminal equipment (DTE) is an end instrument that converts user information into signals for transmission or reconverts received signals into user information. A DTE device communicates with the data circuit-terminating equipment (DCE). The DTE/DCE classification was introduced by IBM.
A DTE is the functional unit of a data station that serves as a data source or a data Sink_(computing) and provides for the data communication control function to be performed in accordance with link protocol.
The data terminal equipment may be a single piece of equipment or an interconnected subsystem of multiple pieces of equipment that perform all the required functions necessary to permit users to communicate. A user interacts with the DTE (e.g. through a human-machine interface), or the DTE may be the user.
DTE is usually a male connector and DCE is a female connector.
A general rule is that DCE devices provide the clock signal (internal clocking) and the DTE device synchronizes on the provided clock (external clocking). D-sub connectors follow another rule for pin assignment. DTE devices usually transmit on pin connector number 2 and receive on pin connector number 3. DCE devices are just the opposite: pin connector number 2 receives and pin connector number 3 transmits the signals.
This term is also generally used in the Telco and CISCO equipment context to designate any device unable to generate clock signs, hence a PC to PC ethernet connection can also be called a DTE to DTE communication. This communication is done via an Ethernet crossover cable as opposed to a PC to DCE (hub, switch, or bridge) communication which is done via an Ethernet straight cable.
US Patent Issued to Ricoh on Dec. 13 for "Lens Barrel, Camera, Portable Data Terminal Equipment, Image Input Equipment, and Cylinder for Lens Barrel" (Japanese Inventor)
Dec 15, 2011; ALEXANDRIA, Va., Dec. 15 -- United States Patent no. 8,075,206, issued on Dec. 13, was assigned to Ricoh Co. Ltd. (Tokyo). "Lens...