A

Analog Display Services Interface (ADSI)

A Bellcore standard defining a protocol on the flow of information between a switch, a server, a voice mail system, or service bureau, for example, and a subscriber's telephone, PC, data terminal, or other communicating device with a screen. ADSI enables a text version of the conversation to be displayed on the screen during the telephone connection. As an example, the user dials into a voice mail account and receives an audio menu for the voice mail functions while the screen displays the menu in text form.

Assisted Telephony

The set of functions that are not just dedicated to telephonic functionality, but are designed to make the establishment of voice calls and media calls available to any Win32-based application. For additional information, see Assisted Telephony in the telephony overview. See also Basic Telephony, Extended Telephony, Supplementary Telephony.

asynchronous

Data transmission method that allows characters to be sent at irregular intervals over a line by preceding each character with a start bit and following it with a stop bit. See also synchronous.