Profile: Guangzhou Yinxun Comm. Tech. Co., Ltd. is a manufacturer of PCM multiplexer, PDH multiplexer, telephone optical multiplexer, E1 failover (protection) switch, and fiber optic equipment. We are ISO 9001-2000 certified. PCM Multiplexer is the fundamental device for digital communication system, which is also called PCM basic group device. It is used to multiplex the signals such as voice, data, and image into a standard 2M interface via various interface cards, realizing point-to-point transmission. ZMUX-200 is a multi-service access MUX with optical link featuring flexible modular design based on VLSI solution. It provides max 16 channels of subscriber interfaces, a 4*E1 interface, and max 4 channels of 10/100Base_T interfaces for varied subscriber services.