公开(公告)号：US4385380A

公开(公告)日：1983-05-24

申请号：US240228

申请日：1981-03-03

申请人： Frederick H. Rees ,  Daniel F. Martin ,  Joseph P. Ryness

发明人： Frederick H. Rees ,  Daniel F. Martin ,  Joseph P. Ryness

IPC分类号： H04M7/14 ,  H04Q11/04 ,  H04J3/14

CPC分类号： H04Q11/04

摘要： In a fully digital telephone switching system, a digital switch may serve a number of PCM sub systems each having separate forward and reverse highways and each serving a number of subscribers' lines. The highways are grouped in blocks of eight, from which intelligence is received in serial byte-interleaved form and converted by serial-parallel converters to parallel byte-interleaved form. While in this form they are switched to other channels and applied to a super-multiplexer which they leave in parallel byte-interleaved form from which they are restored by another converter to serial byte-interleaved form for application to the switch's outputs. For the reverse channel the arrangement is the reverse of the above, i.e. serial-parallel conversion, switching and parallel-serial conversion to the line multiplex highways. For local calls a loop-back connection is provided via a fixed delay of half a frame time. Thus, if the outputs fail, the arrangement can still handle local calls. Further it is usable on its own as a small exchange.

摘要翻译： 在全数字电话交换系统中，数字交换机可以服务多个PCM子系统，每个PCM子系统具有单独的正向和反向高速公路，并且每个服务于多个订户的线路。 高速公路被分组成八个块，其中以串行字节交织形式接收智能，并且由串行并行转换器转换成并行字节交织形式。 虽然以这种形式，它们被切换到其他通道并且被应用于超级多路复用器，它们以并行的字节交错形式离开，由另一个转换器将它们恢复为串行字节交错形式，以应用于交换机的输出。 对于反向信道，该布置与上述相反，即串行并行转换，开关和并行 - 串行转换到线路多路复用高速公路。 对于本地呼叫，通过半帧时间的固定延迟来提供环回连接。 因此，如果输出失败，则该配置仍然可以处理本地呼叫。 此外，它可以自己作为一个小交换。