可靠性是通讯网性能主要指标之一。

Reliability is one of the main indexes of the communication network's performance.

这个地区还不在通讯网的覆盖之内。

This area has not been covered by the communication net.

有线无线一体化技术是通讯网的发展趋势。

The trend of technological development of telecommunication networks is to provide both wired access and wireless access.