市话信道测试研究

Measurement and Research of the City Telephone Channels

在对市内电话信道阻抗特性、衰耗特性测试的基础上,提出市话线路可采用频分复用的方法传递载波信号,如数字调制信号、语言载波信号等。从而提高市话信道的利用率。该测试结果可为研制市话信道复用的通信设备提供参考.

This paper,based on the measurement of the impedance-frequency characteristics and attenuation characteristics of the city telephone line network ,proposes a method of FDM to transfer carrier signal,such as digital modulation signal,tone carrier signal,etc . thus the utilization ratio of the city telephone line is improved. This measured result can offer reference for studying communication equipment of multiplexing the city telepone channels.