telephone exchange circuit

The communication system is composed by fiber, exchanger and way-side telephone. Development of the circuit providing timing and synchronization signals for private automatic branch exchange

通信系统主要由光纤数字传输系统、数字程控用户交换机系统和路侧紧急电话系统三部分组成。数字程控用户交换机时钟与同步系统电路设计

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Hotel service functions, equipped with international direct dial telephone, circuit television, business center, exchange, laundry room.

宾馆服务功能齐全, 内设国际直拔电话, 闭路电视, 商务中心 、 外汇兑换处 、 洗衣房.

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