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随着农村经济的发展,对电话通信事业的要求也日益增高,目前我省农村电话仍十分落后,不仅效率低,而且音量小,杂音大,广播伴音也大。为了改变这种状况,河南省邮电科研所最近研制成功ZHL-9环路载波机,并通过了专家鉴定。该机试制成功并投入使用后可实现农村电话自动化、多路化,使线路利用率提高9倍。目前正在使用的交换机都能与该设备配合;且使用灵活,能沿途下
With the development of the rural economy, the demand for telephony is also increasing. At present, rural telephony in our province is still lagging behind. It is not only inefficient, but also has a small volume, a large noise and a large broadcast sound. In order to change this situation, the Henan Posts and Telecommunications Research Institute recently developed ZHL-9 loop carrier, and passed the expert appraisal. After the successful trial of the aircraft and put into use can rural telephones automation, multiplexing, so that line utilization increased 9 times. Switches currently in use are compatible with the device; they are flexible and can be used along the way