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1. 发明公开

EP0389492A1 INTELLIGENT ALARM APPARATUS WITH INTERFACING TO A TELEPHONE NETWORK 失效
标题翻译：于界面到电话网络的智能报警装置。
公开(公告)号：EP0389492A1
公开(公告)日：1990-10-03
申请号：EP88908699.0
申请日：1988-10-14
申请人： SOSTEL OY
发明人： MYLLYMÄKI, Matti
IPC分类号： G08B23 , H04B1 , H04M11
CPC分类号： G08B23/00 , H04M11/04 , H04W52/028 , H04W52/0296 , Y02D70/00
摘要： The invention concerns an intelligent alarm apparatus with interfacing to a telephone network, comprising of an alarm sensor (2), which is directly connected at a high impedance level via an integrator (2) and a detector (3) to the interrupt input of a processor (4) waiting in a power-saving mode. The interrupt generated to the processor (4) is adapted to activate an alarm transmission to an alarm control point. A power supply section (5) of the apparatus is connected to a telephone line (6), from which the apparatus obtains its power feed.

2. 发明公开

EP0324975A3 Transmission system for telephone communication or data transfer 失效
标题翻译：用于电话通信或数据传输的传输系统
公开(公告)号：EP0324975A3
公开(公告)日：1990-11-28
申请号：EP88121664.2
申请日：1988-12-24
申请人： SOSTEL OY
发明人： Myllymäki, Matti
IPC分类号： H04B14/00 , H04L5/14
CPC分类号： H04L5/1423 , H04B14/004
摘要： The invention concerns a transmission system for telephone communications comprising at least two telephone sets, each incorporating a microphone (9) and a receiver and/or loudspeaker, a telephone line connecting the telephone sets by at least two conductors in order to form a current loop. Connected to the current loop is an alternating-current generator (2) and current-steering switch elements (11), arranged to steer the current to be routed during the positive half-cycles generated by the generator via the microphone circuit (9) of the first set and the receiver and/or loudspeaker circuit (10′) of the second set as well as to steer the current during the negative half-cycles via the receiver and/or loudspeaker circuit (10′) of the first set and the microphone circuit (9) of the second set, whereby voice transmission takes place by sampling the microphone signals of the inter-connected telephone sets and transmitting the alternate signal samples superimposed on the generator signal so that the microphone signal of the first set is superimposed on the positive half-cycles of the generator signal while the microphone signal of the second set is superimposed on the negative half-cycles of the generator signal. The invention is also applicable to data transmission, wherein the telephone sets are replaced by modems of a simple construction.

3. 发明公开

EP0324975A2 Transmission system for telephone communication or data transfer 失效
标题翻译： Übertragungssystemfüreine Telephonverbindung oderfüreineDatenübertragung。
公开(公告)号：EP0324975A2
公开(公告)日：1989-07-26
申请号：EP88121664.2
申请日：1988-12-24
申请人： SOSTEL OY
发明人： Myllymäki, Matti
IPC分类号： H04B14/00 , H04L5/14
CPC分类号： H04L5/1423 , H04B14/004
摘要： The invention concerns a transmission system for telephone communications comprising at least two telephone sets, each incorporating a microphone (9) and a receiver and/or loudspeaker, a telephone line connecting the telephone sets by at least two conductors in order to form a current loop. Connected to the current loop is an alternating-current generator (2) and current-steering switch elements (11), arranged to steer the current to be routed during the positive half-cycles generated by the generator via the microphone circuit (9) of the first set and the receiver and/or loudspeaker circuit (10′) of the second set as well as to steer the current during the negative half-cycles via the receiver and/or loudspeaker circuit (10′) of the first set and the microphone circuit (9) of the second set, whereby voice transmission takes place by sampling the microphone signals of the inter-connected telephone sets and transmitting the alternate signal samples superimposed on the generator signal so that the microphone signal of the first set is superimposed on the positive half-cycles of the generator signal while the microphone signal of the second set is superimposed on the negative half-cycles of the generator signal. The invention is also applicable to data transmission, wherein the telephone sets are replaced by modems of a simple construction.
摘要翻译：本发明涉及一种用于电话通信的传输系统，其包括至少两个电话机，每个电话机包括麦克风（9）和接收器和/或扬声器，电话线通过至少两个导体连接电话机，以形成电流回路。连接到电流回路的是交流发电机（2）和电流转向开关元件（11），其被布置成在由发电机通过发电机的麦克风电路（9）产生的正半周期期间转向要路由的电流第一组的第一组和第二组的接收器和/或扬声器电路（10分钟），以及在负半周期期间经由第一组的接收器和/或扬声器电路（10分钟）控制电流，并且麦克风电路（9），由此通过对互连电话机的麦克风信号进行采样并发送叠加在发生器信号上的交替信号样本，使第一组麦克风信号叠加在一起，进行语音传输发生器信号的正半周期，而第二组的麦克风信号叠加在发生器信号的负半周期上。本发明也适用于数据传输，其中电话机由简单结构的调制解调器代替。

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