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Cloud communications are Internet-based voice and data communications where telecommunications applications, switching and storage are hosted by a third-party outside of the organization using them, and they are accessed over the public Internet. Cloud services is a broad term, referring primarily to data-center-hosted services that are run and accessed over an Internet infrastructure. Until recently, these services have been data-centric, but with the evolution of VoIP (voice over Internet protocol), voice has become part of the cloud phenomenon.〔Arnold, Jon. ("Why businesses need to think differently about cloud communications" ), ''Focus'', April 16, 2010.〕 Cloud telephony refers specifically to voice services and more specifically the replacement of conventional business telephone equipment, such as a Private branch exchange (PBX), with third-party VoIP service.〔http://www.networkworld.com/columnists/2011/022111gearhead.html New Web-based VoIP Product launched〕 Cloud communications providers deliver voice & data communications applications and services, hosting them on servers that the providers own and maintain, giving their customers access to the “cloud.” Because they only pay for services or applications they use, customers have a more cost-effective, reliable and secure communications environment, without the headaches associated with more conventional PBX system deployment.〔Whitemore, James. ("Unified communications for the enterprise: hosted VoIP or cloud communications" ), ''Smoothstone IP Communications'', June 4, 2009.〕 Companies can cut costs with cloud communications services without sacrificing features.〔Morisy, Michael. ("Cloud-based unified communications could reduce costs and hassle" ), ''SearchUnifiedCommunications.com'', April 9, 2009.〕 The success of Google and others as cloud-based providers has demonstrated that a cloud-based platform can be just as effective as a software-based platform, but at a much lower cost. Voice services delivered from the cloud increases the value of hosted telephony, as users can equally well turn to a cloud-based offering instead of relying on a facilities-based service provider for hosted VoIP. This expands their options beyond local or regional carriers.〔 In the past, businesses have been able to do this for IT services, but not telecom. Cloud communications is attractive because the cloud can now become a platform for voice, data and video. Most hosted services have been built around voice, and are usually referred to as hosted VoIP. The cloud communications environment serves as a platform upon which all these modes can seamlessly work as well as integrate.〔 There are three trends in enterprise communications pushing users to access the cloud and allowing them to do it from any device they choose, a development traditional IT communications infrastructure was not designed to handle. The first trend is increasingly distributed company operations in branches and home offices, making WANs cumbersome, inefficient and costly. Second, more communications devices need access to enterprise networks – iPhones, printers and VoIP handsets, for example. Third, data centers housing enterprise IT assets and applications are consolidating and are often being located and managed remotely.〔Thornycroft, Peter. ("Moving communications into the cloud" ), ''Phone+'', April 1, 2010.〕 ==Applications== Cloud telephony services have been predominantly used for business processes, such as advertising, e-commerce, human resources, and payments processing.〔(Cloud Services - Cloud Computing Solutions ). Accenture. Retrieved on 2014-01-29.〕 Services include distributed call centers and economical teleworking.〔(Traditional Phone System or Cloud Telephony: Which is Right for Your Business? ). Communicationsdiversified.com (2012-08-02). Retrieved on 2014-01-29.〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Cloud communications」の詳細全文を読む スポンサード リンク
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