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GLOSSARY
Covering User
The person at an alternate answering position who answers a
redirected call.
Data Channel
A communications path between two points used to transmit digital
signals.
Data Communications Equipment (DCE)
Refers to a specific RS-232C interface connector configuration. The
DCE devices are designed to interface directly (pin-for-pin) to Data
Terminal Equipment (DTE).
The transmit and receive pins are
reversed from that of a DTE interface. A modem is an example of a
DCE device.
Data Dial Code (DDC)
The extension number of a digital data endpoint.
Data Endpoint
Two general groups:
those having a DTE-type interface, which
encompasses almost all of the data terminal devices, and those
having a DCE interface, which are primarily modems. It should be
noted that within each category, control interfaces may vary. Refer
to Analog Data Endpoint and Digital Data Endpoints for additional
information.
Data Module
A DCE device providing a standard interface between data
equipment and a TN726 Data Line CP port on the switch. Only ADU
Models Z3A1, Z3A2, Z3A4, and Z3A5 are supported.
Data Terminal Equipment (DTE)
DTE refers to a specific RS-232C connector termination designed to
connect directly to a DCE-type connection. Typically associated with
video display terminals, printers, and computers that either originate
or terminate a data transmission path.
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