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本文采用盈亏点分析法对常见市话局间中继传输方式进行了经济性比较。提出了在数字传输与模拟传输的比较中,中继线路长度是决定性变量;而在基群与高次群的比较中,中继电路数是决定性变量的结论,文中还给出了有关计算结果的曲线。
In this paper, the profit and loss analysis of the common local exchange between cities and towns relay transmission economic comparison. Proposed in the digital transmission and analog transmission comparison, the length of the trunk line is the decisive variable; and in the comparison of the group and the high order group, the number of relay circuits is the decisive variable conclusion, the paper also gives the calculation results of the curve .