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1. 发明授权

US4253157A Data access system wherein subscriber terminals gain access to a data bank by telephone lines 失效
标题翻译：数据访问系统，其中用户终端通过电话线路访问数据库
公开(公告)号：US4253157A
公开(公告)日：1981-02-24
申请号：US947699
申请日：1978-09-29
申请人： Wallace Kirschner , Lawrence M. Haskel
发明人： Wallace Kirschner , Lawrence M. Haskel
IPC分类号： G06F7/00 , G06F17/30 , G06Q30/00 , H04M11/08 , G06F3/04 , G06F3/153
CPC分类号： H04M11/085 , Y10S707/99939 , Y10S707/99945 , Y10S707/99948
摘要： A data access system comprises a plurality of intelligent terminals capable of selectively receiving data from a data bank by means of barge-in telephone lines. Each terminal includes a basic terminal into which application modules and device control modules may be plugged. The application modules contain programs enabling the computer to perform specified functions in conjunction with certain stored subroutines within the basic terminal. A device control module enables communication by telephone with the data bank. A terminal subscribes to the data bank by transferring selectively subscription data to memory within the terminal. In one embodiment, subscription data identifying by serial numbers the terminals which are to become subscribers is circulated on subscription barge-in telephone lines. If a terminal calls a subscription line on which there appears the serial number for that terminal, the subscription data for that terminal is permanently stored within the application module of the terminal. The text data to which the terminal has subscribed is retrieved from the data bank by calling a barge-in telephone line (on which such data is circulated) if the stored subscription data shows that the subscription is in effect.
摘要翻译：数据存取系统包括多个智能终端，能够通过插入式电话线路有选择地从数据库接收数据。每个终端包括可插入应用模块和设备控制模块的基本终端。应用模块包含程序，使计算机能够与基本终端内某些存储的子程序一起执行指定的功能。设备控制模块通过电话与数据库进行通信。终端通过选择性地将订阅数据传送到终端内的存储器来订阅数据库。在一个实施例中，通过序列号识别要成为订户的终端的订阅数据在签约电话线上循环。如果终端呼叫出现该终端的序列号的订阅行，则该终端的订阅数据被永久地存储在终端的应用模块内。如果所存储的订阅数据显示订阅有效，则通过呼叫插入电话线（在其上传播这样的数据）从数据库检索终端已经订阅的文本数据。

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