首页> 外国专利> Multi-stage time division multiplexing - a telephone exchange system with of data stations, image remote speakers, conference devices, vermittlungsplaetzen and the like. Existing but groups

Multi-stage time division multiplexing - a telephone exchange system with of data stations, image remote speakers, conference devices, vermittlungsplaetzen and the like. Existing but groups

机译:多级时分多路复用-具有数据站,图像远程扬声器,会议设备,验证台等的电话交换系统。现有但团体

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