In monitoring realm the digital and network is a trend that can be extensively applied in telecommunication, power, transportation, bank, irrigation works, intelligence mansion etc.
在监控领域中，数字化和网络化是一种趋势，可广泛应用在电信、电力、交通、银行、水利、智能大厦等领域。
2
With the rapid development of Internet and the modern telecommunication technology, Digital information security has increasingly been cared.
随着网络和现代通信技术的飞速发展，数字化多媒体信息的安全问题正日益成为人们关注的焦点。
3
The switch signal was encoded directly and one state was expressed with 3 long distance sequence code, then it was transmitted through the digital relay line of telecommunication network.