常用的建筑弱电系统主要有以下几种:
Common building weak current systems mainly include the following:
(1) 电话通信系统
(1) Telephone communication system
实现电话(包括三类传真机、可视电话等)通信功能;星型拓扑结构;使用三类(或以上)非屏蔽双绞线，传输信号的频率在音频范围内。
Realize telephone (including three types of fax machines, videophones, etc.) communication function; Star topology; Class III (or above) unshielded twisted pair is used, and the frequency of the transmitted signal is within the audio range.
(2) 计算机局域网系统
(2) Computer LAN system蠕动泵 保定建筑设计 保定网站建设 保定网站制作 保定网络公司 保定办公家具 保定轻钢别墅
是实现办公自动化及各种数据传输的网络基础;星型拓扑结构;使用五类(或以上)非屏蔽双绞线，传输数字信号，传输速率可达100 Mb/s以上。
It is the network basis for realizing office automation and various data transmission; Star topology; Use category 5 (or above) unshielded twisted pair to transmit digital signals with a transmission rate of more than 100 MB / s.
(3) 音乐/广播系统
(3) Music / broadcasting system
通过安装在现场(如商场、车站、餐厅、客房、走廊等处)的扬声器，播放音乐，并可通过传声器对现场进行广播;多路总线结构;传输由功率放大器输出的定压(如120 V/120 Ω)的音频信号，以驱动现场扬声器发声，传输线使用铜芯绝缘导线。
Play music through loudspeakers installed on the site (such as shopping malls, stations, restaurants, guest rooms, corridors, etc.), and broadcast the site through microphones; Multi-channel bus structure; The audio signal with constant voltage (such as 120 V / 120 Ω) output by the power amplifier is transmitted to drive the field speaker to sound. The transmission line uses copper core insulated conductor.