Instruction manual

GLOSSARY
Data Communications Equipment (DCE)
The equipment on the network side of a communication link that provides all the func-
tions required to make the binary serial data from the source or transmitter compatible
with the communications channel.
Data Terminal Equipment (DTE)
Equipment comprising the source or link of data, or both, that also provides communica-
tion control functions (protocol). DTE is any piece of equipment at which a communica-
tions path begins or ends.
Delay-Dial Trunk
After a request for service (called a seizure) is detected on an incoming trunk, the system
sends a momentary signal followed by a steady tone over the trunk. This informs the cal-
ling party that dialing can start. This type of trunk allows dialing directly into the system.
That is, the digits are received as they are dialed.
Designated Voice Terminal
The specific voice terminal to which calls, originally directed to a certain extension
number, are redirected. Commonly used to mean the ‘‘forwarded-to’’ terminal when Call
Forwarding All Calls is active.
Dial Repeating Tie Trunk
A telecommunications channel between two private switching systems. The number
dialed is repeated or dialed-in at the distant end.
Digital Communications Protocol (DCP)
Defines the capability for providing simultaneous voice and data transmission over the
same channel.
Digital Data Endpoints
In DEFINITY Generic 1, digital data endpoints include the following:
510D Personal Terminal or 515-Type Business Communications Terminal
7404D Terminals
7406D or 7407D Equipped With Optional Data Module Base
Asynchronous Data Units
Digital Terminal Data Modules
Modular Processor Data Modules
Modular Trunk Data Modules
3270 Data Modules
Internal Data Channels
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