US 5,095,445 A · Data communication system capable of communicating on-line with communication terminal equipment of a plurality of types

Abstract

A data transmission system avoids charging of line utilization fees when it is attempted to send data to a destination incapable of receiving the data and can be readily operated even by an operator having little technical knowledge. By storing function information relating to the terminals of a plurality of parties, the system automatically determines prior to transmission whether data is capable of being transmitted to a destination. On the basis of the function information and the data to be transmitted, a list of parties which are and are not capable of receiving a transmission is displayed on a CRT, thereby enabling the operator to visually identify in advance which parties can and cannot be sent data. The system makes it possible to identify at least the form of data to be transmitted and to display the list of parties which are and are not capable of receiving a transmission.

Claims30

Dependent claims

A data communication system capable of communicating with communication terminal equipment of a plurality of types through a communication line, comprising:

memory means which has previously stored information identifying a type of every terminal equipment, said types being of at least two types which communicate different types of data;
designation means for designating a communicating party to which transmission data is to be transmitted;
and
control means for reading out from said memory means said information identifying the type of terminal equipment corresponding to the communicating party designated by said designation means, for discriminating whether the communicating party designated by said designation means is capable of receiving said transmission data based on said transmission data and information read out from said memory means, and for controlling transmission processing based on the result of the discrimination,
wherein said control means terminates said transmission processing when the party designated by said designation means is incapable of receiving said transmission data before the transmission line is connected.

2 more elements

Dependencies are inferred from the claim text.

Data communication system capable of communicating on-line with communication terminal equipment of a plurality of types

Life of this patent

Data communication system capable of communicating on-line with communication terminal equipment of a plurality of types

Life of this patent

Abstract

Claims30