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On Defining VoIP Telephone Systems - Business and Finance Articles

On Defining VoIP Telephone Systems - Business and Finance Articles


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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, causing potential quality and security issues. Fortunately, most infrastructure manufacturer's supplies a collection of quality of service (QoS) and security features to ensure the quality and security of voice transmissions.


The power to transmit voice over an IP network (by way of example, the Internet) allows many corporate networks to readily interconnect their sites without purchasing dedicated leased lines between their sites or depending on the public switched telephone network (PSTN), which imposes charges for certain call types (for instance, cross country and international calls).


With the advent of VoIP technology, some confusion has arisen around its associated nomenclature. For example, look at the terms VoIP and IP telephony. Both talk about sending voice across an IP network. However, the main distinction involves the endpoints available. For example, in a very 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 distinction between VoIP and IP telephony, think about the drawings below. In the top portion of the figure, the endpoints within the VoIP network are, an analogue phone (attached to an analogue port over a gateway) as well as a private branch exchange (PBX) (connected to a digital port with a different gateway). Because neither of these endpoints natively speaks IP, the topology is known as a VoIP network. With VoIP, a Gateway or another 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 having a call manager or call processing server, helping to make call routing decisions for the IP phone. Therefore, the lower topology inside figure is considered an IP telephony network. With IP telephony the VoIP telephone systems be aware 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 with an appliance, server or cloud based for call control and signalling, rather than PBXs. The IP Phone itself performs voice-to-IP conversion, and voice enabled routers usually are not required within the enterprise network. If a connection to the PSTN is required, a voice enabled router or another gateway must be added where calls are forwarded to the PSTN. IP telephony describes cost-effective communication services, including voice, fax and voice messaging applications, transported through the packet-switched IP network rather than the circuit switched PSTN.


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