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与传统的PSTN电话交换网络相比,VoIP通过IP技术实现企业内部之间的日常沟通,能够为企业节省大量的长途费用。随着VoIP技术的日渐成熟,IP电话的通话质量已经接近和等同传统的PSTN网络通话质量,不用再担心通话出现延迟、抖动和杂音干扰。由于VoIP是基于IP网络的电话,因此,能够提供比传统的PSTN网络更加丰富的功能,除语音通话和传真外,还可能实现
Compared with the traditional PSTN telephone exchange network, VoIP realizes the daily communication between enterprises through IP technology, which can save enterprises a large amount of long-distance charges. With the gradual maturity of VoIP technology, IP phone call quality has been close to and equivalent to the traditional PSTN network call quality, do not have to worry about call delay, jitter and noise interference. Since VoIP is an IP-based phone, it offers richer features than traditional PSTN networks and can be implemented in addition to voice calls and faxes