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为使远距离用户可接入交换机 ,笔者研制了数字用户环路设备。该设备采用 80 86CPU作控制系统 ,用户电路和复用电路都采用 MITEL公司生产的集成芯片 ,这使系统控制信号的输出与输入变得极为方便 ,也便于系统功能的进一步提高 (如加入交换功能 )。该设备体积小 ,性能稳定 ,安装方便 ,具有实用价值。
For long-distance users can access the switch, I developed a digital user loop device. The device uses 8086CPU as the control system, the user circuit and multiplexing circuits are used MITEL company’s integrated chip, which makes the system control signal output and input becomes very convenient, but also facilitate the further improvement of system functions (such as adding the exchange function ). The device is small, stable performance, easy installation, with practical value.