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US 5,317,630 AGranted
Interface for a data telephone and data terminal in a digital telephone system
AssigneeAT&T Bell Laboratories
InventorsLee A. Feinberg, Yiu K. Leung
Life of this patent
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AssigneeAT&T Bell Laboratories
InventorsLee A. Feinberg, Yiu K. Leung
Estimating the term…
A data terminal interface for a terminal adapter and an attached computer provides complete flexibility and control of information in a communication environment for a user. Communications between the terminal adapter and a digital network may be provided in existing digital systems, such as either the Digital Communications Protocol or Integrated Services Digital Network system, for example. The data terminal interface facilitates the exchange of information between the terminal adapter and the computer via an asynchronous data module in the terminal adapter. Through the data terminal interface, the computer is able to directly control user interface circuitry in the terminal adapter by responding to and sending unlimited information to this interface circuitry since conformance to a digital protocol is not required for message traffic between these two units. Also the data terminal interface permits all functions that a user is able to perform at the terminal adapter, such as going off-hook, pressing a button, etc., to be performed by the computer and provided to the network. Specific applications such as call screening, custom alerting and automatic call distribution are easily achieved through use of the data terminal interface.
In a terminal adapter arranged for attaching to a digital network and for attaching to a data terminal, a data terminal interface comprising:
In a terminal adapter arranged for attaching to a digital network and for attaching to a data terminal, a data terminal interface comprising:
In a terminal adapter arranged for attaching to a digital network and for attaching to a data terminal, a data terminal interface comprising:
In a digital communication system, a plurality of terminal adapters arranged for attaching to a digital terminal and for attaching to a digital network over a plurality of respectively associated lines, each of the plurality of terminal adapters comprising:
A method of providing control for a terminal adapter arranged for attaching to a digital network and for attaching to a data terminal, the method comprising the steps of:
A method of providing control for a terminal adapter arranged for attaching to a digital network and for attaching to a data terminal, the method comprising the steps of:
Dependencies are inferred from the claim text.