通(tong)(tong)信(xin)及计算机网(wang)络设计、工程施工、安装、维护;通(tong)(tong)信(xin)管道建(jian)设、光电缆线路工程;通(tong)(tong)信(xin)信(xin)息(xi)网(wang)络系统集成(cheng)。