公开(公告)号：US4998275A

公开(公告)日：1991-03-05

申请号：US883295

申请日：1986-07-07

申请人： Marcel Braunstein ,  Craig Hauser

发明人： Marcel Braunstein ,  Craig Hauser

IPC分类号： H04M9/00

CPC分类号： H04M9/005

摘要： There is disclosed a multi-line telephone communications system where the need for the hundreds of conductors that are necessary to connect each station to the control and switching equipment is eliminated. This is achieved by replacing the status indicating leads with analog signals impressed upon the voice leads. A specific signal level is assigned to each of the ring, busy, idle and hold functions so that the voice leads carry both the audio signal and status information signal for each line selectable at the telephone station. In response to activation of the telephone keys by the user a cross point switch establishes a voice signal connection between a selected voice line and a talk path associated with the selecting telephone station. A status signal representative of the status of at least the connected voice line and distinct from voice signals is impressed upon the voice line. This status signal is detected and processed for activating the status indicators at each telephone station. Assignment of lines to particular keys of a telephone station is achieved by storing the assignment in a programmable memory. Whenever a line assignment is to be changed from one key to a different key, it is necessary only to enter the change by reprogramming the memory.

摘要翻译： 公开了一种多线电话通信系统，其中消除了将每个站连接到控制和交换设备所需的数百个导体的需要。 这是通过用模拟信号替代状态指示引线来实现的。 特定的信号电平被分配给每个环，忙，空闲和保持功能，使得语音线路携带在电话台可选择的每一行的音频信号和状态信息信号。 响应于用户激活电话密钥，交叉点交换机在选择的语音线路和与选择电话台相关联的通话路径之间建立语音信号连接。 代表至少所连接的语音线的状态并且与语音信号不同的状态信号被印在语音线上。 检测并处理该状态信号以激活每个电话台的状态指示器。 通过将分配存储在可编程存储器中来实现对电话台的特定键的分配。 每当一个行分配从一个键改变到另一个键时，只需要重新编程存储器即可进入更改。