local telephone exchange meaning in English

本地电话交换机

In 2004 , the capacity of telephone exchanges includes local telephone exchanges
2004年固定电话交换机容量含小灵通交换机。
It is a minitype of pbx with an single chip micyoco as the hardcore , it has four customer and one relay interfaces , a 16 x 16 exchange network , along with a keyboard as input and several leds as output . we can communicate within the local telephone exchange and also with the other phones in the other exchanger
该系统包括了程控交换机的所有基本部件：以单片机为核心的控制系统、四个用户接口、两个中继接口、 8 16交换网络以及信号发生源等，能够实现自动局内呼叫处理、出局呼叫处理以及入局呼叫处理。