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1. 发明授权

US4112261A Key telephone system and method 失效
标题翻译：关键电话系统及方法
公开(公告)号：US4112261A
公开(公告)日：1978-09-05
申请号：US797490
申请日：1977-05-16
申请人： Milo B. Shiff
发明人： Milo B. Shiff
IPC分类号： H04M9/00 , H04M1/00
CPC分类号： H04M9/007
摘要： An improved key telephone system realizes substantial reduction in installation costs, permits use of relatively small central units, provides compatability with telephone apparatus speaker phones, automatic dialers, etc., and provides additional advantages. The system basically embodies:(a) multiple adapter units each connected with and proximate to a station set,(b) multiple supervisory circuits to each of which at least two of said adapter units are connected via a talk pair and a control pair, said circuits being remote from said adapters,(c) system control means connected with said supervisory circuits via a data control bus for asynchronously transmitting to each adapter unit, via said supervisory circuits, data including a start pulse causing the adapter to poll the line select and other switches in the station sets, and return the results of said polling to the system control means via the supervisory circuit in the form of a data word, following which the system control means transmits a data word corresponding to light, bell ringing or intercom bell ringing information.
摘要翻译：改进的关键电话系统实现了大大降低安装成本，允许使用相对较小的中央单元，提供与电话设备扬声器电话，自动拨号器等的兼容性，并提供额外的优点。系统基本体现在：

2. 发明授权

US3973085A Key telephone system with directly associated station cards and sets 失效
标题翻译：主要电话系统，具有直接相关的站卡和套
公开(公告)号：US3973085A
公开(公告)日：1976-08-03
申请号：US509398
申请日：1974-09-26
申请人： Milo B. Shiff
发明人： Milo B. Shiff
IPC分类号： H04M9/00 , H04Q5/18
CPC分类号： H04M9/007
摘要： A telephone system comprises a plurality of station sets, each including a plurality of key buttons, and the system includesA. a station circuit for at least one of the station sets, said station circuit including interface means for transferring data to and receiving data from its associated station set, said interface means including between 2 and 3 pairs of wires connected with the station set, one pair of which is a talk pair, and the remainder of which is or are for power transmission and for transmission of data related to line, status and audible signalling and for control information including switch status, andB. a line circuit for at least one line, each line circuit including means for transmitting control, status and talk information to, and receiving control, status and talk information from, at least one station circuit connected therewith.
摘要翻译：电话系统包括多个站组，每个站组包括多个键按钮，并且系统包括A.用于至少一个站台的站台电路，包括用于传送数据和接收数据的接口装置的固定电路其相关站点，具有接口的两个和三对线之间的界面手段，包括与站台相连的一对对方，以及用于功率传输和传输与线路有关的数据的剩余部分，状态和可信信号和包括开关状态的控制信息，以及B.用于至少一条线路的线路电路，每条线路电路，包括用于发送控制，状态和信息信息以及接收控制，状态和信息信息的手段，至少连接一台电路。

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