To above-mentioned problem, author designed and realized a general telephone exchange office signaling transceiver.
针对上述问题，作者设计并实现了一种通用型电话网局间信令收发器。
The main attemper telephone is a special purview telephone and have the function of telephone exchange and office telephone.
主调度话机作为一个特殊权限的编程话机，具有话务总机及办公电话的一切功能。
The main attemper telephone is a special purview telephone and have the function of telephone exchange and office telephone.
主调度话机作为一个特殊权限的编程话机，具有话务总机及办公电话的一切功能。
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