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公开(公告)号：US3944750A
公开(公告)日：1976-03-16
申请号：US511752
申请日：1974-10-03
CPC分类号： H04Q3/625
摘要： In a telephone switching system wherein a plurality of line circuits are terminated in station sets, the line circuits are interconnectable to a plurality of trunk circuits through a multistage switching network. A call originated by a calling party to a called party, engaged in a conversation with a third party, is completed by overriding the conversation between the called party and the third party provided the calling party is equipped with a class of service which permits call override. Call override is initiated by the calling party upon receipt of a busy tone by a flashing of his switchhook.
摘要翻译： 在其中多个线路电路在站组中终止的电话交换系统中，线路电路通过多级交换网络可互连到多个中继电路。 由被叫方发起的与被叫方进行通话的呼叫通过覆盖被叫方与第三方之间的对话来完成，只要主叫方配备了允许呼叫覆盖的服务等级 。 呼叫覆盖由主叫方在收到忙音后通过闪烁的他的开关灯启动。
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公开(公告)号：US3956595A
公开(公告)日：1976-05-11
申请号：US511753
申请日：1974-10-03
CPC分类号： H04Q3/625
摘要： In a telephone switching system wherein a plurality of line circuits are terminated in station sets, the line circuits are interconnectable to a plurality of trunk circuits through a multistage switching network. A call originated by a calling party to a called party, engaged in a conversation with a third party, is completed at the conclusion of the conversation between the called party and the third party by ringing back the calling party provided the calling party is equipped with the class of service which permits executive ringback. The ringback feature is initiated by the calling party upon receipt of a busy tone by a flashing of his switchhook.
摘要翻译： 在其中多个线路电路在站组中终止的电话交换系统中，线路电路通过多级交换网络可互连到多个中继电路。 由被叫方发起的与被叫方进行通话的呼叫在被叫方和第三方之间的对话结束时通过回叫主叫方配备的主叫方来完成 允许执行回铃的服务类。 响铃功能由主叫方在收到忙音时闪烁他的开关灯开始。
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