纵横制交换由一个称为标志器的特定电路控制，标志器提供整个号码的公共控制并选择所有呼叫的路由。
Crossbar switching was carried out by a special circuit called a maker which provided common control of number entry and line selection for all calls.
纵横制交换由一个称为标志器的特定电路控制，标志器提供整个号码的公共控制并选择所有呼叫的路由。
Crossbar switching was carried out by a special circuit called a maker which provided common control of number entry and line selection for all calls.
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