Many organizations, however, see VoIP as far more than this. More than simply using the network as transport (or plumbing), many organizations see value in not only placing voice "traffic" onto the IP network, but also in placing the actual voice "clients" (the telephones
Figure 1-3 illustrates how an IP gateway (often referred to as an IP blade) that is added to the existing PBX gives those PBX users the ability to place calls over a company's IP network from location to location in order to reduce long-distance charges. Toll-bypass, as this is commonly referred to, is the most obvious benefit of this type of VoIP deployment.
themselves) and new voice applications onto the IP network. This approach, although technically still VoIP, is commonly referred to as IP telephony, i.e., deploying a total telephony solution (including telephones, components, applications, and by extension, users) within the IP network.
In other words, IPT takes the premise of voice and data integration to its natural, albeit long-awaited conclusion: new voice clients (telephones, wireless devices, and desktop software) that, in their basic form, are designed to interface and interact with an IP network, obeying the rules of the IP network, utilizing its protocols, managed by its resources, and most importantly, accessing the myriad of applications that (can) exist on the network.
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