ADTRAN 25 manual Glossary

GLOSSARY

GLOSSARY

The following is a list of definitions of terms used in System 25 documentation.

Administer

To access and change the parameters associated with the services or features of the system.

Analog Data Endpoint

Data endpoints connected to the system by (built-in or stand-alone) modems. They do not require the use of data modules (Asynchronous Data Units) and are addressed like a voice terminal, by Personal Dial Code (PDC). These endpoints connect to Tip/Ring circuit pack ports.

Analog Voice Terminals

See Single-Line Voice Terminals.

Appearance

See Call Appearance.

Asynchronous Data Transmission

A scheme for transmitting data where each character is preceded by a start bit and followed by a stop bit, thus permitting data elements to occur at irregular intervals. This type of transmission is advantageous when transmission is irregular (such as when characters are typed from a keyboard).

Asynchronous Data Unit (ADU)

A Data Communications Equipment (DCE) device that allows direct connection between RS-232C equipment and the digital switch through ports on the TN726 Data Line circuit pack.

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