The tristate driver circuit that interfaces with the main distributing frame and the transmit / receive filters . the drivers and filters are part of the port grouping 与主配线板和发送接收滤波器接口的三态驱动电路。驱动器和滤波器都是端口分组的一部分。
2.
The gas discharge exchanger and transistor used in main distributing frames of program control exchangers can meet the quality verification requirements for network access of ydt694 - 2004 main distributing frames and the technical requirements for lightning proof ensure public security of ga173 - 2002 computer information system 程控交换机总配线架用的气体放电管和半导体管满足yd t694 - 2004总配线架进网质量认证要求，和ga173 - 2002计算机信息系统防雷保安器技术要求。
