Therefore, there needs to be a compression taking place to compact the voice data into a considerable size before it gets transmitted over a packet switching network.
我们必需有发生，以紧凑的声音压缩成一个具有相当规模的数据，然后吃了分组交换传输网络。
2
A a device that handles the switching of voice and data in a local area network.
的装置把手开关的语音和数据，在局部区域网络。
3
This paper reports a multi-feature stored program controlled (SPC) switching system which has voice and data exchange feature and multi-interface.