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Voice over Internet Protocol (VoIP) has become an increasingly popular way to provide phone services. At this moment there is a transition going on from de-livering voice over the Plain Old Telephone System (POTS) to using VoIP te ... celý popis
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Voice over Internet Protocol (VoIP) has become an increasingly popular way to provide phone services. At this moment there is a transition going on from de-livering voice over the Plain Old Telephone System (POTS) to using VoIP tech-nology. There are a num
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