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会议电话分机是会议电话网的终端设备,是供铁道部、铁路局、分局、各站段等用户召开会议用的专用通信设备,它的性能好坏将直接影响着会议质量,为保证会议电话分机的正常使用,部令规定一年进行一次轮修,轮修完的设备要保证外观强度和技术标准符合规定,其技术标准共有六项,而非线性失真和频率特性是六项指标中比较重要的二项技术指标。 会议电话分机中的混合线圈HQ是用来做二四线转换的,原理图如下;
The conference call extension is the terminal equipment of the conference call network. It is a special communication equipment used by the Ministry of Railways, the Railway Administration, the branch offices and other stations to hold meetings. Its performance will directly affect the conference quality. To ensure the conference call The normal use of the extension, the ministry stipulates a round of repair a year, round repair equipment to ensure appearance strength and technical standards comply with the provisions of its technical standards a total of six, and non-linear distortion and frequency characteristics of the six indicators in the comparison Important two technical indicators. Conference call extension in the hybrid coil HQ is used to do two or four conversion, the schematic is as follows;