On Defining VoIP Telephone Systems - Business and Finance Articles
On Defining VoIP Telephone Systems - Business and Finance Articles
VoIP sends packetized voice over an IP network. Typically, the IP network serves as a data network too, leading to potential quality and security issues. Fortunately, most infrastructure manufacturer's offers a collection of quality of service (QoS) and security measures to ensure the quality and security of voice transmissions.
The capacity to transmit voice-over an IP network (as an example, the Internet) allows many corporate networks to readily interconnect their sites without purchasing dedicated leased lines between their sites or counting on the public switched telephone network (PSTN), which imposes charges for many call types (for example, international calls and international calls).
With the advent of VoIP technology, some confusion has arisen around its associated nomenclature. For example, think about the terms VoIP and IP telephony. Both reference sending voice across an IP network. However, the primary distinction involves the endpoints being used. For example, inside a VoIP network, traditional analogue or digital circuits connect into an IP network, typically through some type of gateway. However, VoIP telephone systems contain endpoints that natively communicate using IP.
To further illustrate the difference between VoIP and IP telephony, consider the drawings below. In the top portion of the figure, the endpoints inside the VoIP network are, an analogue phone (attached to an analogue port on the gateway) as well as a private branch exchange (PBX) (associated with a digital port on the different gateway). Because neither of those endpoints natively speaks IP, the topology is considered a VoIP network. With VoIP, a Gateway or any other device manages the conversion of Voice into IP packets.
The bottom portion of the drawings shows an IP phone, which does natively communicate using IP. The IP phone registers using a call manager or call processing server, helping to make call routing decisions on behalf of the IP phone. Therefore, the underside topology within the figure is recognized as an IP telephony network. With IP telephony the VoIP telephone systems be mindful on the conversion of Voice into IP packets. Realize, however, that some literature might use the terms VoIP and IP telephony interchangeably.
IP telephony replaces traditional phones with VoIP telephone systems and uses call processing software, normally by using an appliance, server or cloud based for call control and signalling, as opposed to PBXs. The IP Phone itself performs voice-to-IP conversion, and voice enabled routers are not required inside the enterprise network. If a link to the PSTN is essential, a voice enabled router or any other gateway should be added where calls are given to the PSTN. IP telephony describes cost-effective communication services, including voice, fax and voice messaging applications, transported through packet-switched IP network instead of the circuit switched PSTN.
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