An Analog Telephone Adapter (ATA), also known as the Analog Telephony Adapter, is an electronic device used to enable one or more analog telephones or facsimile machines for Voice over Internet Protocol (VoIP) calls and faxes. An Analog Telephone Adapter basically creates a physical connection by use of telephone and internet cables between a conventional phone or fax and a computer or an Ethernet gateway. The ATA usually comes with a digital phone and internet plan provider but it can also be bought independently. The Analog Telephone Adapter makes voice calls and faxing over the internet possible without the user needing to upgrade existing
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