在宾馆、饭店或医院的电气设计中,为提高服务质量,方便旅客和病员,常常需要在客房、病房与值班室之间设呼应讯号装置。传呼功能较完善的呼应讯号装置现已有很多厂家生产,可供设计中选用,但是,在工程实际中,往往限于投资或一些其他因素,如呼叫单元较少,也不是所有的饭店或医院都适于采用的。比如,我们设计的某招待所 In the electrical design of hotels, restaurants or hospitals, in order to improve the quality of service and to facilitate passengers and patients, it is often necessary to set up an echo signal device between rooms, wards and duty rooms. The echoing signal device with perfect paging function has been produced by many manufacturers and can be used in the design. However, in the actual project, it is often limited to investment or some other factors, such as less call units, and not all hotels or hospitals. Suitable for use. For example, we designed a guest house