公开(公告)号：US5764643A

公开(公告)日：1998-06-09

申请号：US791331

申请日：1997-01-31

Applicant: Tomoyoshi Takebayashi ,  Toshihiro Azami ,  Ryuichi Matsukura ,  Hiroki Hasegawa ,  Satoshi Okuyama

Inventor： Tomoyoshi Takebayashi ,  Toshihiro Azami ,  Ryuichi Matsukura ,  Hiroki Hasegawa ,  Satoshi Okuyama

IPC: H04M1/00 ,  H04M11/00 ,  H04Q11/04 ,  H04Q1/30

CPC classification number: H04Q11/0471 ,  H04Q2213/13031 ,  H04Q2213/13034 ,  H04Q2213/1309 ,  H04Q2213/13093 ,  H04Q2213/13103 ,  H04Q2213/13106 ,  H04Q2213/13174 ,  H04Q2213/13176 ,  H04Q2213/13199 ,  H04Q2213/13202 ,  H04Q2213/13209 ,  H04Q2213/13214 ,  H04Q2213/1327 ,  H04Q2213/13271 ,  H04Q2213/13292 ,  H04Q2213/13297 ,  H04Q2213/13299 ,  H04Q2213/1332 ,  H04Q2213/13322 ,  H04Q2213/1336 ,  Y10S370/904

Abstract: An ISDN interface unit interconnects a data processing unit, an ISDN, and an analog telephone and comprises a DMA request signal generation circuit for generating a DMA request signal from an 8 kHz clock signal from an ISDN line. In accordance with the request signal, PCM coded data input from the ISDN line is transferred, using DMA, to a memory of the data processing unit or vice versa, or the ISDN interface unit comprises a code conversion circuit, data stored in the data processing unit are converted to nonlinear PCM coded data and transmitted to the ISDN line or vice versa. Further, the ISDN interface unit comprises communication functions for the digital signal and for the voice band signal, a control channel signal sent from the ISDN line is interpreted, and one of the communication functions can be selected.

Abstract translation: ISDN接口单元将数据处理单元，ISDN和模拟电话互连，并且包括用于从ISDN线路的8kHz时钟信号产生DMA请求信号的DMA请求信号生成电路。 根据请求信号，从ISDN线路输入的PCM编码数据使用DMA传输到数据处理单元的存储器，反之亦然，或者ISDN接口单元包括代码转换电路，存储在数据处理中的数据 单元转换为非线性PCM编码数据并传输到ISDN线路，反之亦然。 此外，ISDN接口单元包括用于数字信号的通信功能，并且对于语音频带信号，解释从ISDN线路发送的控制信道信号，并且可以选择通信功能之一。

公开(公告)号：US5450412A

公开(公告)日：1995-09-12

申请号：US799161

申请日：1991-11-27

Applicant: Tomoyoshi Takebayashi ,  Toshihiro Azami ,  Ryuichi Matsukura ,  Hiroki Hasegawa ,  Satoshi Okuyama

Inventor： Tomoyoshi Takebayashi ,  Toshihiro Azami ,  Ryuichi Matsukura ,  Hiroki Hasegawa ,  Satoshi Okuyama

IPC: H04Q11/04 ,  H04M11/06

CPC classification number: H04Q11/0471 ,  H04Q2213/093 ,  H04Q2213/103 ,  H04Q2213/13031 ,  H04Q2213/13034 ,  H04Q2213/1309 ,  H04Q2213/13093 ,  H04Q2213/13103 ,  H04Q2213/13106 ,  H04Q2213/13174 ,  H04Q2213/13176 ,  H04Q2213/13199 ,  H04Q2213/13202 ,  H04Q2213/13209 ,  H04Q2213/13214 ,  H04Q2213/1327 ,  H04Q2213/13271 ,  H04Q2213/13292 ,  H04Q2213/13297 ,  H04Q2213/13299 ,  H04Q2213/1332 ,  H04Q2213/13322 ,  H04Q2213/1336 ,  H04Q2213/214 ,  H04Q2213/292 ,  H04Q2213/32 ,  H04Q2213/322 ,  H04Q2213/36

Abstract: An ISDN interface unit interconnects a data processing unit, an ISDN, and an analog telephone and includes a DMA request signal generation circuit for generating a DMA request signal from an 8 kHz clock signal from an ISDN line. In accordance with the request signal, PCM coded data input from the ISDN line is transferred, using DMA, to a memory of the data processing unit or vice versa, or the ISDN interface unit includes a code conversion circuit, data stored in the data processing unit are converted to nonlinear PCM coded data and transmitted to the ISDN line or vice versa. Further, the ISDN interface unit includes communication functions for the digital signal and for the voice band signal, a control channel signal sent from the ISDN line is interpreted, and one of the communication functions can be selected.

Abstract translation: ISDN接口单元将数据处理单元，ISDN和模拟电话互连，并且包括用于从ISDN线路的8kHz时钟信号产生DMA请求信号的DMA请求信号生成电路。 根据请求信号，从ISDN线输入的PCM编码数据使用DMA传送到数据处理单元的存储器，反之亦然，或者ISDN接口单元包括代码转换电路，存储在数据处理中的数据 单元转换为非线性PCM编码数据并传输到ISDN线路，反之亦然。 此外，ISDN接口单元包括用于数字信号的通信功能，并且对于语音频带信号，解释从ISDN线路发送的控制信道信号，并且可以选择通信功能之一。