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1.概论多年来人们早就知道用简便、价廉而有效的转发器作为转接通话的方法。尽管单频和双频混合分配制的特殊系统经常应用于复杂的转接通话转发器,即使由于信道间隔狭小而引入滤波问题也在所不惜,但是一般说来,这种方法还是局限于使用双频频率规划法的系统。虽然上述方法简便,但还存在着诸多缺点。本文集的目的不仅介绍其优点,而且要指出不适宜使用转接通话的地方,以及在使用时应尽量注意的地方。
1. Introduction Over the years, people have long known that simple, inexpensive, and effective transponders can be used as a method for transferring calls. Although the special system of single-frequency and dual-frequency hybrid distribution is often applied to the complicated switched talk transponder, even if the filtering problem is introduced due to the narrow channel spacing, in general, this method is still limited to the use of double Frequency Frequency Planning Law system. Although the above method is simple, there are still many shortcomings. The purpose of this essay is not only to introduce its advantages, but also to point out where it is not appropriate to use a transfer call, and where it should be used as much as possible.