VIOP不知道,如果是VOIP的話:
Voice over IP
Voice over Internet Protocol, also called VoIP, IP Telephony, Internet telephony, Broadband telephony, Broadband Phone and Voice over Broadband is the routing of voice conversations over the Internet or through any other IP-based network.
Protocols which are used to carry voice signals over the IP network are commonly referred to as Voice over IP or VoIP protocols. They may be viewed as commercial realizations of the experimental Network Voice Protocol (1973) invented for the ARPANET.ce providers. Some cost savings are due to utilizing a single network to carry voice and data, especially where users have existing underutilized network capacity they can use for VoIP at no additional cost. VoIP to VoIP phone calls on any provider are typically free, while VoIP to PSTN calls generally costs the VoIP user.
There are two types of PSTN to VoIP services: DID (Direct Inward Dialing) and access numbers. DID will connect the caller directly to the VoIP user while access numbers require the caller to input the extension number of the VoIP user. Access numbers are usually charged as a local call to the caller and free to the VoIP user[citation needed] while DID usually has a monthly fee. There are also DID that are free to the VoIP user but is
IP電話
IP電話(簡稱VoIP，源自英語Voice over Internet Protocol；又名寬帶電話或網絡電話)是壹種透過因特網或其他使用IP技術的網絡，來實現新型的電話通訊。過去IP電話主要應用在大型公司的內聯網內，以讓技術管理人員可以同時以壹個網絡提供數據及語音服務，簡化管理之余，更可提高生產力。隨著因特網日漸普及，以及跨境通訊數量大幅飆升，IP電話亦被應用在長途電話業務上。由於世界各主要大城市的通信公司競爭日劇，以及各國電信相關法令松綁，IP電話也開始應用於固網通信，其低通話成本、低建設成本、易擴充性及日漸優良化的通話質量等主要特點，被目前國際電信企業看成是傳統電信業務的潛在有力競爭者。