求翻译：它不仅继承了原有PSTN网络的所有业务，还能把大量的数据传输卸载到IP网络中以减轻PSTN网络的负荷；又由于网络融合的新特性，增加了许多新型业务是什么意思？

It not only inherited the original pstn network business, but also a lot of data transmission uninstall ip network in order to reduce the pstn network load; network integration of new features, many new business

It not only inherited the original PSTN network all of the business, but also the large amount of data transfer to uninstall IP PSTN network in order to reduce network load, and due to the network integration of new features, many new businesses have increased

Not only it has inherited original PSTN network all services, but also can unload the massive data transmission to the IP network in reduces the PSTN network the load; Also as a result of the network fusion new characteristic, increased many new services

It not only inherit all the existing PSTN network business, also to unload data into a large number of IP networks to reduce the load on the PSTN network and network integration of new features, a variety of new business

正在翻译，请等待...